J Syst Evol

• Research Articles •    

The importance of the Mexican taxa of Asteraceae on the family phylogeny

Patricia Rivera1,2*, José Luis Villaseñor2, Teresa Terrazas2, José L. Panero3   

  1. 1Instituto de Biología, Universidad Nacional Autónoma de México, Departamento de Botánica, Apartado Postal 70-367, 04510 Ciudad de México, México
    2Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México
    3Department of Integrative Biology, University of Texas, 1 University Station C0930, Austin, TX 78712, USA
  • Received:2020-03-18 Accepted:2020-08-17

Abstract:

Asteraceae is the largest plant family in México with about 417 genera and 3,113 species, more than 60% of them endemic. Phylogenetic relationships at subfamily and tribal levels have been previously resolved employing both nuclear and plastid molecular markers. However, Asteraceae species native to Mexico have been underrepresented in such phylogenies. To tackle this issue, the taxon sampling of this study included 90 Asteraceae species native to México, four species from the Caribbean, 119 previously sequenced species, and six outgroups. With this sampling, all the Asteraceae subfamilies and all of the tribes recognized to date are represented. The analyzed data set consisted of eleven chloroplast markers (atpB, matK, ndhC, ndhD, ndhF, ndhI, ndhJ, ndhK, rbcL, trnL-trnF, 23S-trnA). We present two phylogenetic reconstructions obtained by maximum likelihood and pseudocoalescent methods. Besides, we present a time-calibrated phylogeny, used to infer the best configuration of diversification rate shifts. Our results show that Mexican species are distributed mainly in the subfamily Asteroideae (80 species), followed by Cichorioideae (6 species), Carduoideae (2 species), and Mutisioideae (2 species). Four net diversification rate shifts were found: One near the base of the tree and four within Asteroideae subfamily. Our extended sampling of the family with the representation of native species to Mexico allowed us to identify important events in the evolutionary history of the family.

Key words: Asteraceae phylogeny, Asteroidae, Bajacalia, Electranthera, Heliantheae alliance, Mexican Asteraceae