Table of Contents
  • Volume 59 Issue 1

    Cover illustration: Cover illustration: The population genetic structure and admixture history of Tibeto-Burman-speaking Tujia people are largely unknown due to a lack of sampling. Investigation on the fi ne-scale genetic structure in 505 unrelated individuals from 63 indigenous central Chinese populations by He et al. (pp. 1–20 in this issue) not only discovered the strong genetic similarities between Tujia and surrounding Han Chinese, suggesting massive population movements and genetic admixture under language bor [Detail] ...
      
      Issue Information
    • 2021, 59 (1): 1–4
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    • Research Articles
    • Guang‐Lin He, Ying‐Xiang Li, Meng‐Ge Wang, Xing Zou, Hui‐Yuan Yeh, Xiao‐Min Yang, Zheng Wang, Ren‐Kuan Tang, Su‐Min Zhu, Jian‐Xin Guo, Ting Luo, Jing Zhao, Jin Sun, Zi‐ Yang Xia, Hao‐Liang Fan, Rong Hu, Lan‐Hai Wei, Gang Chen, Yi‐ Ping Hou, and Chuan‐Chao Wang
      2021, 59 (1): 1–20
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      Archaeological, genetic, and linguistic evidence has supported the idea that northern China is the original center of modern Sino‐Tibetan‐speaking populations. However, the demographic history of subsequent southward migration and genetic admixture of Han Chinese with surrounding indigenous populations remain uncharacterized, and the language shifts and assimilations accompanied by movement of people, or just an adaptation of cultural ideas among populations in central China is still unclear, especially for Tibeto‐Burman‐speaking Tujia and central Han Chinese populations. To resolve this, we genotyped over 60K genome‐wide markers in 505 unrelated individuals from 63 indigenous populations. Our results showed both studied Han and Tujia were at the intermediate position in the modern East Asian North–South genetic cline and there was a correlation between the genetic composition and the latitude. We observed the strong genetic assimilation between Tujia people and central Han Chinese, which suggested massive population movements and genetic admixture under language borrowing. Tujia and central Han Chinese could be modeled as a two‐way admixture deriving primary ancestry from a northern ancestral population closely related to the ancient DevilsCave and present‐day Tibetans and a southern ancestral population closely related to the present‐day Tai‐Kadai and Austronesian‐speaking groups. The ancestral northern population we suspect to be related to the Neolithic millet farming groups in the Yellow River Basin or central China. We showed that the newly genotyped populations in Hubei Province had a higher proportion of DevilsCave or modern Tungusic/Mongolic‐related northern ancestries, while the Hunan populations harbored a higher proportion of Austronesian/Tai‐Kadai‐related southern ancestries.
    • We genotyped over 600K genome‐wide markers in 505 unrelated individuals from 63 indigenous populations. Our results showed that both studied Han and Tujia were at the intermediate position in the modern East Asian North–South genetic cline and there was a correlation between the genetic composition and the latitude. We observed the strong genetic assimilation between Tujia people and central Han Chinese, which suggested massive population movements and genetic admixture under language borrowing. Tujia and central Han Chinese could be modeled as a two‐way admixture deriving primary ancestry from a northern ancestral population closely related to the ancient DevilsCave and present‐day Tibetans and a southern ancestral population closely related to the present‐day Tai‐Kadai and Austronesian‐speaking groups. The ancestral northern population we suspect to be related to the Neolithic millet farming groups in the Yellow River Basin or central China. We showed that newly genotyped populations in Hubei Province had a higher proportion of DevilsCave or modern Tungusic/Mongolic‐related northern ancestries, while the Hunan populations harbored a higher proportion of Austronesian/Tai‐Kadai‐related southern ancestries.
    • Rebeca Laino Gama , Alexandra Nora Muellner‐Riehl , Diego Demarco , and José Rubens Pirani
      2021, 59 (1): 21–43
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      Meliaceae are a mostly pantropical family in the Sapindales, bearing flowers typically provided with a staminal tube, formed by filaments that are fused partially or totally. Nevertheless, several genera of subfamily Cedreloideae have free stamens, which may be adnate to an androgynophore in some taxa. The fact that the family exhibits a wide diversity of floral and fruit features, as well as of sexual systems and pollination syndromes, presents interesting questions on the evolutionary processes that might have taken place during its history. In this study, we analyzed the distribution of 20 reproductive morphological traits of Meliaceae, upon an available molecular phylogenetic framework, using 31 terminals from the family's two main clades (Cedreloideae and Melioideae), plus six Simaroubaceae taxa as outgroup. We aimed to identify and/or confirm synapomorphies for clades within the family and to develop hypotheses on floral evolution and sexual systems in the group. Our reconstruction suggests that the ancestor of Meliaceae was possibly provided with united stamens and unisexual flowers in dioecious individuals, with a subsequent change to free stamens and monoecy in the ancestor of Cedreloideae. Most characters studied show some degree of homoplasy, but some are unique synapomorphies of clades, such as the haplostemonous androecium. An androgynophore defines the Cedrela‐Toona clade. The comparative approach of our study and the evolutionary hypotheses generated herein reveal several aspects demanding further structural investigation, and possible evolutionary pathways of the reproductive structures along with the lineages' diversification, mostly related to the specialization of sexual systems, floral biology, and dispersal strategies.
    • Li He, Natascha Dorothea Wagner, and Elvira Hörandl
      2021, 59 (1): 44–57
      The Hengduan Mountains (HDM) in China are an important hotspot of plant diversity and endemism, and are considered to be a secondary diversification center for the woody plant genus Salix L. (Salicaceae). Here we aimed to reconstruct the spatiotemporal evolution of the Salix ChamaetiaVetrix clade in the HDM and to test for the occurrence of a local radiation. We inferred phylogenetic relationships based on more than 34 000 restriction‐site associated DNA loci from 27 species. Phylogenetic analyses recovered a well‐resolved tree topology with two major clades, the Eurasian clade and the HDM clade, with a divergence time of ca. 23.9 Ma. Species in the HDM clade originated in the northern part of the range and adjacent areas, and then dispersed into the southern HDM, westwards to the Himalayas and eastwards to the Qinling Mountains. Niche modelling analyses reveal that range contractions occurred in the northern areas during the last glacial maximum, while southward expansions resulted in range overlaps. Reconstructions of character evolution related to plant height, inflorescence, and flower morphology suggest that adaptations to altitudinal distribution contributed to the diversification of the HDM willows. Our data support the occurrence of a radiation in the HDM within the Salix ChamaetiaVetrix clade. Dispersal within the mountain system, and to adjacent regions, in addition to survival in glacial refugia shaped the biogeographical history of the clade, while adaptations of the HDM willows along an altitudinal gradient could be important ecological factors explaining the high species diversity of Salix in this area.
    • Marcin Piwczyński, Paulina Trzeciak, Madalina‐Oana Popa, Maciej Pabijan, José María Corral, Krzysztof Spalik, and Andrzej Grzywacz
      2021, 59 (1): 58–72
      The angiosperm Apiaceae tribe Scandiceae includes four major clades—subtribes Daucinae, Ferulinae, Torilidinae, and Scandicinae—that originated ca. 20 Mya. Although all four subtribes are highly supported in molecular analyses, and morphological data indicate a sister relationship between Daucinae and Torilidinae, their branching order has not been resolved using standard Sanger multilocus data. Therefore, in this study, we test the utility of genomic RAD seq data in resolving deep phylogenetic relationships (up to 20 Mya) in Apiaceae subfamily Apioideae, with special emphasis on tribe Scandiceae using 12 representative species. We used two bioinformatic pipelines, pyRAD and RADIS (based on STACKS), to assemble RAD seq data and we tested the influence of various combinations of parameters on the robustness of the inferred tree topologies. Although different data processing approaches produced alignments with various amounts of missing data, they converged to two well‐supported topologies, irrespective of the phylogenetic method applied. Highly supported trees showed Scandicinae as sister to all other clades and indicated that Daucinae and Torilidinae are sister groups, thus confirming the relationship inferred from morphology. We conclude that the RAD seq method can be successfully used to resolve deep relationships formed 20 Mya within Apiaceae. We provide recommendations for parameter settings in RADIS and pyRAD for the analysis of taxa that have accumulated considerable genomic divergence.
    • Xin Yao, Yu Song, Jun‐Bo Yang, Yun‐Hong Tan, and Richard T. Corlett
      2021, 59 (1): 73–82
      The holly genus, Ilex L., in the monogeneric Aquifoliaceae, is the largest woody dioecious genus (>664 spp.), with a near‐cosmopolitan distribution in mesic environments. We constructed a phylogeny based on two nuclear genes, representing 177 species spread across the geographical range, and dated using macrofossil records. The five main clades had a common ancestor in the early Eocene, much earlier than previously suggested. Ilex originated in subtropical Asia and extant clades colonized South America by 30 Ma, North America by 23 Ma, Australia by 8 Ma, Europe by 6 Ma, and Africa by 4 Ma. South and North America were colonized multiple times. Ilex also reached Hawaii (10 Ma) and other oceanic islands. Macrofossil and pollen records show the genus has tracked mesic climates through time and space, and had a wider distribution before late Miocene global cooling. Our phylogeny provides a framework for studies in comparative ecology and evolution.
    • Terezie Mandáková, Kaylynn Ashby, Bo J. Price, Michael D. Windham, John G. Carman, and Martin A. Lysak
      2021, 59 (1): 83–92
      Apomixis in crucifer (Brassicaceae) species is rare, reported in just four genera (Boechera, Draba, Erysimum, and Parrya), and one intergeneric hybrid (Raphanobrassica). It is well studied only in Boechera, where it is widespread among 100+ recognized species. However, its occurrence in related genera of the tribe Boechereae has not been documented previously. Here we analyzed genome evolution, mode of reproduction, and fertility of the monospecific Boechereae genus Phoenicaulis (P. cheiranthoides), endemic to the northwestern United States. We discovered that the species encompasses diploid (2n = 2x = 14), triploid (2n = 3x = 21), and tetraploid (2n = 4x = 28) populations. Comparative chromosome painting analyses revealed that the three karyotypes are essentially structurally identical, differing only in the presence of a largely heterochromatic chromosome (Het) in the triploid and tetraploid cytotypes. The genome structure of Phoenicaulis appeared identical to that of Boechera species previously analyzed, suggesting genomic stasis despite the morphological and molecular divergence of the two genera. This genome colinearity extended to the presence and structure of the Het chromosomes, which are closely associated with apomictic reproduction in Boechera. Interestingly, all three cytotypes of Phoenicaulis proved to be apomictic, regardless of the presence or absence of a Het chromosome, and sexual populations have yet to be identified.
    • Siddharthan Surveswaran, Sharad S. Kambale, Mansa Srivastav, Sachin A. Punekar, Shrirang R. Yadav, and K. Praveen Karanth
      2021, 59 (1): 93–112
      The Indian subcontinent has experienced a major shift in climatic regime from a wet tropical regime to increased seasonal rainfall, since the late Miocene. This shift has been attributed to the intensification of monsoons, which led to opening up of dry habitats in humid forests and formation of deciduous forests. We explored the role of this climatic shift in the origin and diversification of dry‐adapted plant genera Ceropegia and Brachystelma (Ceropegiae, Asclepiadoideae, Apocynaceae). We sampled Ceropegia and Brachystelma from across India and used five markers (two nuclear and three plastid regions) to reconstruct a global phylogeny of this group. Indian members of the tribe Ceropegiae were derived from Africa through at least four independent dispersal events. All dispersal events occurred in late Miocene after establishment of a monsoon climate. One of these early dispersing lineages underwent rapid radiation in peninsular India, giving rise to around 50 species. Thus, both dispersal and diversification events coincided with the intensification of monsoons and concomitant aridification. The role of environment in the evolution of floral characteristics and root type in the Indian radiation is also discussed. This is one of the first reports on a dry‐adapted endemic radiation of plants in India.
    • Romana Urfusová, Václav Mahelka, František Krahulec, and Tomáš Urfus
      2021, 59 (1): 113–124
      Hybridization, polyploidization, and crop‐to‐wild gene transfer within the agriculturally important tribe Triticeae are well explored experimentally, but the true consequences of both phenomena under natural conditions remain understudied. The present paper reports on an investigation of three species of couch grasses (Elymus hispidus, E. repens, and E. caninus) examining the ploidy levels and absolute genome sizes (1081 plants from 302 natural populations in Central Europe, verified by chromosome counts) and their morphological delimitation. In the present study, the hexaploid level prevailed in E. hispidus and E. repens whereas E. caninus was exclusively tetraploid. Introgressive hybridization between hexaploid species, unidirectionally shifted towards E. hispidus, was indicated by a continual pattern of genome size values. We did not find any evidence for heteroploid hybridization involving tetraploid E. caninus; however, we detected minority cytotypes among both E. caninus plants (hexaploid) and E. repens–E. hispidus hybrids (heptaploid and nonaploid) suggesting the formation of unreduced gametes. Morphometric results (367 plants, redundancy analysis, principal component analysis, and correlation analysis) mirrored the continual homoploid pattern of absolute genome size (including the unidirectional shift), and a significant correlation between absolute genome size and morphology was confirmed. Moreover, morphometric analyses detected additional characteristics for the delimitation of the Elymus taxa under study. Considering the crossability of E. hispidus with Triticum aestivum (bread wheat), the revealed extent of introgressive hybridization has implications for assessing the potential risk of gene flow between crops and troublesome weeds.
    • Si‐Qi Liang, Ronald L. L. Viane, Xian‐Chun Zhang, and Ran Wei
      2021, 59 (1): 125–140
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      The Asplenium pekinense complex mainly comprises one diploid, A. sarelii Hook. (rare), one autotetraploid, A. pekinense Hance (best known and very common), and shares two allotetraploids, A. anogrammoides Christ (common but often misidentified) and A. altajense (Komarov) Grubov (rare and endemic) with the A. varians complex. The latter is further constituted by two diploids, A. tenuicaule Hayata (widespread) and A. semivarians Viane & Reichstein (rare), as well as other three tetraploids, A. kansuense Ching (barely known), A. varians Wallich ex Hooker & Greville (well‐known, relatively common, and morphologically variable), and A. kukkonenii Viane & Reichstein (rare and often misidentified). These two species complexes are notorious for their taxonomic difficulty based on general morphology, which is mainly caused by their history of reticulate evolution. Here, we collected most species within the two complexes, and obtained ploidy information by spore size measurement and flow cytometry investigation. Phylogenetic analyses using DNA markers representing maternally inherited chloroplast and biparentally inherited nuclear genomes helped to reconstruct the reticulate evolution history. The present results support previous hypotheses that A. sarelii is the ancestor of both A. pekinense and A. anogrammoides, as well as that A. tenuicaule is the common progenitor of A. anogrammoides, A. varians, and A. kukkonenii. We also unraveled the autotetraploid origin of A. kansuense from A. tenuicaule for the first time, and found that A. altajense shares essentially identical genomes with A. anogrammoides.
    • Ya‐Dong Zhou, Biyansa Hirpo Boru, Sheng‐Wei Wang, and Qing‐Feng Wang
      2021, 59 (1): 141–150
      Woody and herbaceous plants are differentially influenced by the environment, with non‐random association with the evolutionary history of these taxa and their traits. In general, woody plants may have climate‐dominated niches, whereas herbaceous plants may have edaphic and microhabitat‐dominated niches. Here, we explored and mapped how the patterns of species richness, phylogenetic diversity, and structures of total, woody, and herbaceous plants vary across the geographical regions and with respect to 12 environmental variables across Ethiopia and Eritrea, in the horn of Africa. Our result showed that both richness and phylogenetic diversity had almost the same tendency in total woody and herbaceous plants, in which they showed positive relationships with annual precipitation, precipitation annual range of climate, all the three variables of topography, and total nitrogen and total extractable phosphorus of soil, and negative relations with mean annual temperature. Compared with the total and herbaceous plants, the environmental variables explained greater variance both in the standardized effect size phylogenetic diversity and net relatedness index for woody plants. Our results highlight that, on the large spatial scales, the environmental filtering process has played a greater role in structuring species into local communities for woody plants than for herbaceous plants.
    • Santosh Kumar Rana, Dong Luo, Hum Kala Rana, Alexander Robert O’Neill, and Hang Sun
      2021, 59 (1): 151–168
      Geoclimatic factors related to the uplift of the Himalaya and the Quaternary climatic oscillations influence the population genetic connectivity in the Himalaya–Hengduan Mountains (HHM) biodiversity hotspot. Therefore, to explore the relative roles played by these two factors, we examined the population dynamics and dispersal corridors of Incarvillea arguta (Royle) Royle incorporating ensemble species distribution modelling (SDM). Thirty‐seven populations were genotyped using plastid chloroplast DNA and low copy nuclear gene (ncpGS) sequences. Phylogeographic analysis was carried out to reveal the genetic structure and lineage differentiation. Ensemble SDMs were carried out for distributional change in the last glacial maximum, present, and future. Finally, the least cost path method was used to trace out possible dispersal corridors. The haplotypes were divided into four clades with strong geographical structure. The late Miocene origin of I. arguta in the western Himalaya ca. 7.92 Ma indicates lineage diversification related to the uplift of the HHM. The variability in habitat connectivity revealed by SDM is due to change in suitability since the Pleistocene. A putative dispersal corridor was detected along the drainage systems and river valleys, with strong support in the eastern Hengduan Mountains group. Our results support the signature of geoclimatic influence on population genetic connectivity of I. arguta in the HHM. We proposed that the major drainage systems might have assisted the rapid dispersal of isolated riverine plant species I. arguta in the HHM. The population genetic connectivity, using the fine‐tuned ensemble SDMs, enables scientists and policymakers to develop conservation strategies for the species gene pool in the HHM biodiversity hotspots.
    • Yi‐Qin Xu, Xin Li, Yang Zhong, and Yu‐Fang Zheng
      2021, 59 (1): 169–182
      The diversity of axon guidance (AG) receptors reflects gains in complexity of the animal nervous system during evolution. Members of the Roundabout (Robo) family of receptors interact with Slit proteins and play important roles in many developmental processes, including AG and neural crest cell migration. There are four members of the Robo gene family. However, the evolutionary history of Robo family genes remain obscure. We analyzed the distribution of Robo family members in metazoan species ranging in complexity from hydras to humans. We undertook a phylogenetic analysis in metazoans, synteny analysis, and ancestral chromosome mapping in vertebrates, and detected selection pressure and functional divergence among four mammalian Robo paralogs. Based on our analysis, we proposed that the ancestral Robo gene could have undergone a tandem duplication in the vertebrate ancestor; then one round of whole genome duplication events occurred before the divergence of ancestral lamprey and gnathostome, generating four paralogs in early vertebrates. Robo4 paralog underwent segmental loss in the following evolutionary process. Our results showed that Robo3 paralog is under more powerful purifying selection pressure compared with other three paralogs, which could correlate with its unique expression pattern and function. Furthermore, we found four sites under positive selection pressure on the Ig1‐2 domains of Robo4 that might interfere with its binding to Slits ligand. Diverge analysis at the amino acid level showed that Robo4 paralog have relatively greater functional diversifications than other Robo paralogs. This coincides with the fact that Robo4 predominantly functions in vascular endothelial cells but not the nervous system.
    • Gui‐Liang Xin, Guo‐Lun Jia, Xiao‐Long Ren, Yue‐Yue Wang, Peng Zhao, and Wen‐Zhe Liu
      2021, 59 (1): 183–197
      The evolutionary pathway between hermaphroditism and dioecy (females and males in a single population) draws widespread interests, and androdioecy (bisexuals and males in a single population) is rarely achieved as an intermediate state between the two breeding systems. Flower bud differentiations in the pistils of hermaphrodites and the pistillodes of males in androdioecious Tapiscia sinensis Oliv. are investigated by routine paraffin section technology, light microscopy, and scanning electron microscopy. A phylogenetic approach is used to analyze the origin of androdioecy. In T. sinensis, hermaphroditic flowers (HF) and male flowers (MF) experienced a similar development pattern in early flower bud differentiation, including the initiation of tepals and stamens. However, the carpel differentiation of MF and HF proceed in different patterns. In HF, the central zone bulges out and produces a ring meristem on which two to three carpel primordia emerge, which eventually developed into a normal pistil with a stigma, a style, and an ovary. However, in most MF, vestigial pistils are stem‐like (type I), and very few have an empty ovary (type II) or a sterile ovule (type III). Moreover, the evolution of sexual systems within the Huerteales indicates that hermaphroditism is the primitive character of T. sinensis. Tapiscia sinensis shows different degrees of reduction between male flowers and bisexual ones in the evolution to dioecy. Functional androdioecy originated from a hermaphroditic ancestor in T. sinensis and, as an intermediate sexual system, involves evolution from hermaphrodites to dioecy.
    • Lu‐Liang Huang, Jian‐Hua Jin, and Alexei A. Oskolski
      2021, 59 (1): 198–215
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      Keteleeria is a small genus of Pinaceae now mainly restricted to eastern Asia. Although this genus has been documented with a wide distribution in the geologic record of Europe, North America, and Asia, its history in low‐latitude areas (including South China) has remained obscure. In this paper, a fossil wood of Keteleeria sp. is described from the Late Pleistocene (29–27 ka BP) of the Maoming Basin, South China. This wood is the most ancient megafossil evidence of Keteleeria within the modern distribution area of this genus. The fossil records of Keteleeria suggests that this thermophyllous genus migrated into South China by the Middle Pleistocene escaping from glacial cooling and became widespread over this region in the Late Pleistocene beginning from the interglacial stage preceding the Last Glacial Maximum. The analysis of growth rings in the fossil wood and its comparison with those of modern Keteleeria davidiana (Bertrand) Beissner indicates that in the Late Pleistocene of Maoming Basin (29–27 ka BP) there was a humid climate with less pronounced seasonality of precipitation than that seen in the subtropical monsoonal climate of modern northeastern Vietnam. Apparently, the Maoming Basin was influenced by interglacial regime with summer–monsoon circulation. The previously proposed method to distinguish between evergreen and deciduous conifers based on growth ring anatomy, is not reliable because of the wide variance and ambiguity in its results.
    • Lin‐Bo Jia, Steven R. Manchester, Jian Huang, Tao Su, Li Xue, Shi‐Tao Zhang, Yong‐Jiang Huang, and Zhe‐Kun Zhou
      2021, 59 (1): 216–226
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      Fossil records of endemic plants play an important role in recognizing the floristic history of East Asia and thereby facilitate the conservation of plant diversity in the region. However, the fossil record of many extant East Asian endemic genera remains poorly documented thus far. Here, we report an infructescence fossil of an East Asian endemic genus, Sladenia (Sladeniaceae), from the early Miocene of southeastern Yunnan, China. The fossil is characterized by: (i) dichasial cymes; and (ii) flask‐shaped ovary with dense subparallel ribs on the surface extending from the base to the distal end of the united style. It represents the first fossil record of Sladenia in Asia, showing that the genus was established in the region at least by the early Miocene. Given that a much older fossil record of Sladeniaceae has been reported from Africa and the sister group of Sladenia is distributed only in Africa, Sladenia is not likely of East Asian origin. The present endemic status of Sladenia was possibly achieved by regional extirpation in Africa and taking refuge in East Asia. This case thus supports the “Museum” rather than “Cradle” hypothesis for the genesis of high plant species in the flora of East Asia. A comparison of the present fossil with extant Sladenia infructescence shows morphological stasis from the early Miocene to present. Such evolutionary tardiness might have resulted in the reduced fitness of the genus, which further caused its current endangered situation.
    • Reviewers List
    • 2021, 59 (1): 227–228
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      The Journal of Systematics and Evolution would like to acknowledge and thank the following reviewers for their contributions in the period January 1–December 31 in 2020:

      Andrés‐Sánchez, Santigo

      Antunes Carvalho, Fernanda

      Appelhans, Marc

      Bachelier, Julien

      Bai, Wei‐Ning

      Baldwin, Bruce

      Banasiak, Lukasz

      Bao, Ying

      Bard, Nicholas

      Benítez Benítez, Carmen

      Berry, Paul

      Bonifacio de Leon, Mauricio

      Bontrager, Megan

      Boufford, David

      Brandrud, Marie Kristine

      Bruederle, Leo

      Camara, Paulo

      Cameron, Kenneth

      Cannon, Chuck

      Carta, Angelino

      Catherine, Lafarge

      Chen, Chun‐Yan

      Chen, Hua

      Chen, Lei

      Chen, Zhi‐Duan

      Clark, Lynn

      Compton, James

      Conran, John

      Corlett, Richard

      Costa, Suzana

      Crane, Peter

      Crawford, Daniel

      Crespo, Manuel B.

      Crowl, A

      Davis, Aaron

      Davis, Jerrold

      De Franceschi, Dario

      de Sousa, Philipe

      Del Rio, Cédric

      Deng, Min

      Denk, Thomas

      Dickinson, Timothy A.

      Dou, Quan‐Wen

      Du, Fang

      Dupuis, Julian R.

      Duvall, Melvin

      Ebersbach, Jana

      Eder, Johanna

      Edera, Alejandro

      Elliott, Tammy L.

      Eriksson, Torsten

      Escudero, Marcial

      Evans, Timothy M.

      Favre, Adrien

      Figlar, Dick

      Fior, Simone

      Fitzpatrick, Matt

      Ford, Bruce

      Foster, Charles

      Freire, Susana

      Freudenstein, John

      Friis, Else

      Fritsch, Peter

      Gao, Lian‐Ming

      Ge, Xue‐Jun

      Geltman, Dmitry

      Gensel, Patricia

      Gerrath, Jean

      Gillespie, Emily

      Givnish, Thomas

      Goetghebeur, Paul

      Gold, Zack

      Gong, Yan‐Bing

      Gostel, Morgan

      Graham, Sean

      Hao, Gang

      Harris, AJ

      Herendeen, Patrick

      Hermsen, Elizabeth

      Herrera, Fabiany

      Hipp, Andrew

      Huang, Chien‐Hsun

      Huang, Shuang‐Quan

      Huarte, Roberto

      Ickert‐Bond, Stefanie

      Jiao, Yuan‐Nian

      Jiménez‐Mejías, Pedro

      Jin, Xiao‐Hua

      Jin, Jian‐Hua

      Joyce, Elizabeth

      Jud, Nathan

      Kang, Ming

      Karunarathne, Piyal

      Kenrick, Paul

      Kessler, Michael

      Khine, Phyo Kay

      Klein, Tamir

      Klimešová, Jitka

      Klopper, Ronell R.

      Knoop, Volker

      Kress, John

      Kuo, Li‐Yaung

      Lakusic, Dmitar

      Landis, Jacob

      Lashermes, Philippe

      Lehnert, Marcus

      Lehtonen, Samuli

      Levin, Geoffrey

      Li, Fay‐Wei

      Li, Hui

      Li, Jianhua

      Li, Lin‐Feng

      Li, Sirius

      Li, Zhen

      Li, Zheng

      Li, Zhong‐Hu

      Liao, Wan‐Jin

      Lin, Zhenguo

      Liu, Bing

      Liu, Bo‐Ling

      Liu, Jian‐Quan

      Liu, Juan

      Liu, Jun‐Feng

      Lu, Li‐Min

      Luceño, Modesto

      Lunau, K.

      Ma, Jian‐Chao

      Ma, Tao

      Ma, Xiao‐Fei

      Mairal Pisa, Mario

      Mandel, Jennifer

      Manos, Paul

      Mao, Jian‐Feng

      Mao, Kang‐Shan

      Marlien, van der Merwe

      Marrano, Annarita

      Martín‐Bravo, Santiago

      Martinetto, Edoardo

      Mathews, Sarah

      McLay, Todd

      McNeal, Joel

      Michelangeli, Fabian A.

      Molina Venegas, Rafael

      Momohara, Arata

      Moody, Michael

      Moore, Abigail

      Morrone, Juan José

      Mu, Xian‐Yun

      Naghiloo, Somayeh

      Nie, Ze‐Long

      Niu, Yang

      Nobis, Marcin

      Oberprieler, Christoph

      Ohlsen, Daniel

      Ojeda, Dario

      Otero, Ana

      Packer, Jasmin

      Pais, Andrew

      Papini, Alessio

      Pedrosa‐Harand, Andrea

      Pelser, Pieter

      Peterson, Paul

      Pigg, Kathleen

      Pipes, Leonore

      Poschlod, Peter

      Potter, Daniel

      Qi, Ji

      Qian, Hong

      Qiu, Ying‐Xiong

      Quan, Cheng

      Ran, Jin‐Hua

      Ree, Richard

      Reginato, Marcelo

      Ren, Ming‐Xun

      Ren, Zong‐Xin

      Reznicek, Anton

      Riina, Ricarda

      Roalson, Eric

      Rong, Jun

      Röβler, Ronny

      Sahu, Sunil Kumar

      Salariato, Diego

      Salino, Alexandre

      Saunders, Richard

      Sauvage, Thomas

      Sawicki, Jakub

      Schneeweiss, Gerald

      Schneider, Harald

      Schutz, Nicole

      Sengupta, Aniket

      Shan, Hong‐Yan

      Shao, Lisha

      Shi, Cheng‐Min

      Shi, Gong‐Le

      Simon‐Porcar, Violeta

      Smýkal, Petr

      Søchting, Ulrik

      Solis‐Montero, Lislie

      Soltis, Douglas

      Soltis, Pamela

      Song, Yi‐Gang

      Soreng, Robert

      Sosa, Victoria

      Spalink, Daniel

      Steinmann, Victor

      Storchova, Helena

      Stubbs, Rebecca L.

      Su, Tao

      Su, Xu

      Sun, Bai‐Nian

      Sun, Fengjie

      Sun, Gen‐Lou

      Sun, Gui‐Ling

      Sun, Hai‐Qin

      Sun, Hang

      Sun, Jian

      Sun, Miao

      Sun, Yong‐Shuai

      Surget‐Groba, Yann

      Susanna, Alfonso

      Tate, Jennifer A.

      Taylor, Jo

      Teixido, Alberto

      Tolke, Elisabeth

      Toniutti, Lucile

      Tosal Alcobé, Aixa

      Triplett, Jimmy

      Trunschke, Judith

      VanWallandael, Acer

      Villa, Irene

      von Balthazar, Maria

      Wade, Rachael

      Walker, Joseph F.

      Wang, Bao‐Sheng

      Wang, Hong

      Wang, Jing

      Wang, Jun

      Wang, Li

      Wang, Nian

      Wang, Qing‐Feng

      Wang, Wei

      Wang, Yin‐Zheng

      Wang, Ying‐Qiang

      Wang, Yu‐Fei

      Wang, Yu‐Guo

      Wang, Ze‐Fu

      Wang, Zhi‐Heng

      Wanke, Stefan

      Waterway, Marcia

      Wei, Ran

      Wei, Xin‐Li

      Wester, Petra

      Westerberg, Lars

      Westergaard, Kristine

      Weston, Peter

      Wilson, Andrew

      Wilson, Barbara

      Wilson, Paul

      Wojciechowski, Martin

      Wu, Zhi‐Qiang

      Xiang, Chun‐Lei

      Xing, Yao‐Wu

      Xu, Qing

      Xu, Shu‐Hua

      Xu, Xiao‐Ting

      Yabe, Atsushi

      Yan, Hai‐Fei

      Yan, Yue‐Hong

      Yang, Hai‐Ling

      Yang, Ji

      Yang, Jun

      Yang, Melinda

      Yang, Shi‐Xiong

      Yang, Ze‐Feng

      Ye, Qing

      Yesilyurt, Jovita

      Yi, Ting‐Shuang

      Yu, Wen‐Bin

      Yu, Yan

      Zander, Richard

      Zavada, Michael

      Zavialova, Natalia

      Zeng, Qing‐Yin

      Zeng, Yan‐Fei

      Zhang, Hai‐Qing

      Zhang, Jian‐Qiang

      Zhang, Jin‐Long

      Zhang, Kai‐Mei

      Zhang, Li‐Bing

      Zhang, Shu‐Ren

      Zhang, Ti‐Cao

      Zhang, Wenheng

      Zhang, Wen‐Ju

      Zhang, Wen‐Xia

      Zhang, Xiao‐Ming

      Zhang, Yu‐Xiao

      Zhang, Zhen‐Hua

      Zhang, Zhi‐Yong

      Zhao, Yun‐Peng

      Zhou, Ren‐Chao

      Zhu, An‐Dan

      Zhu, Shan‐Shan

      Zuluaga, Alejandro

Editors-in-Chief
Song Ge
Jun Wen
Impact Factor
4.098
JCR 2020 IF ranking: 41/235 (Plant Sciences, top 17.24%, Q1 quartile)
Journal Abbreviation: J Syst Evol
ISSN: 1674-4918 (Print)
1759-6831 (Online)
CN: 11-5779/Q
Frequency: Bi-monthly

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