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TAXON

Plant Diversity and Resources

Journal of Systematics and Evolution

Volume 56 Issue 2, Pages 105119.

Published Online: 21 Dec. 2017

DOI: 10.1111/jse.12291

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Phylogeny and maternal donor of Roegneria and its affinitive genera (Poaceae: Triticeae) based on sequence data for two chloroplast DNA regions (ndhF and trnHCpsbA)

Ying-Xia Lei1, Jia Liu1, Xing Fan1,2, Li-Na Sha1,2, Yi Wang1,2, Hou-Yang Kang1,2, Yong-Hong Zhou1,2, and Hai-Qin Zhang1,2*

1Triticeae Research Institute, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China

2Key Laboratory of Crop Genetic Resources and Improvement, Ministry of Education, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China

Keywords: Campeiostachys; Elymus; maternal donor; ndhF; Roegneria; trnHCpsbA

Abstract:

Roegneria C. Koch is a relatively large polyploid perennial genus with 130 species in the Triticeae, and consisting of the St and Y genomes. There are different opinions about whether Roegneria is an independent genus, or whether it should be included in the genus Elymus L. For many species of Roegneria, their genome constitution and phylogenetic relationship are still unknown. More research about the maternal genome donor of the Roegneria species is needed. To investigate the phylogenetic relationships and maternal genome donor of Roegneria and its affinitive genera, phylogenetic analyses of two chloroplast regions ndhF and trnH–psbA sequences were carried out in this study. The results showed that: (i) Campeiostachys Drobow (StYH) and all Roegneria (StY, StStY) species were scattered with Pseudoroegneria Á. Löve (St) species; (ii) R. sinica Keng, R. schugnanica (Nevski) Nevski, R. seriotina Keng, and Elymus calcicolus (Keng) Á. Löve containing the St genome; (iii) there was differentiation among species of Pseudoroegneria; and (iv) the St genome in diploid, tetraploid, and hexaploid species are divergent. Thus, it is suggested that: (i) Pseudoroegneria served as the maternal genome donor of Roegneria, including four species with unknown genomic constitutions (R. sinica, R. schugnanica, R. seriotina, and E. calcicolus); (ii) species of Roegneria or Pseudoroegneria might serve as the maternal genome donor of Campeiostachys; and (iii) the St genome has undergone differentiation during polyploidization in diploid, tetraploid, and hexaploid species.


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