High phylogeographic and genetic diversity of Tidestromia lanuginosa supports full-glacial refugia for arid-adapted plants in southern and central Coahuila, Mexico
Por:
Sanchez-del Pino, Ivonne, Alfaro, Alejandra, Andueza-Noh, Ruben H., Mora-Olivo, Arturo, Chavez-Pesqueira, Mariana, Ibarra-Morales, Ariadna, Moore, Michael J., Flores-Olvera, Hilda
Publicada:
1 ene 2020
Resumen:
Premise: Recent phylogeographic work suggests the existence of latitudinal gradients in genetic diversity in northern Mexican plants, but very few studies have examined plants of the Chihuahuan Desert. Tidestromia lanuginosa is a morphologically variable annual species whose distribution includes the Chihuahuan Desert Region. Here we undertook phylogeographic analyses of chloroplast loci in this species to test whether genetic diversity and differentiation of Mexican populations of T. lanuginosa change along a latitudinal gradient and whether diversity is higher in Coahuila, consistent with ideas of lower plant community turnover during the Pleistocene. Methods: Haplotype network, maximum likelihood tree, and Bayesian phylogenetic haplotype were reconstructed, and genetic diversity was assessed among 26 populations. Barrier analysis was used to explore barriers to gene flow. Results: Four major population groups were identified, corresponding with physiographic provinces in Mexico. Each population group displayed high levels of genetic structure, haplotype, and nucleotide diversity. Diversity was highest in southern populations across the species as a whole and among the Chihuahuan Desert populations. Conclusions: Tidestromia lanuginosa provides an important example of high phylogeographic and genetic diversity in plants of northern Mexico. Barriers to gene flow among the major population groups have most likely been due to a combination of orographic, climatic, and edaphic variables. The high genetic diversity of T. lanuginosa in southern and central Coahuila is consistent with the hypothesis of full-glacial refugia for arid-adapted plants in this area, and highlights the importance of this region as a center of diversity for the Chihuahuan Desert flora. © 2020 Botanical Society of America
Filiaciones:
Sanchez-del Pino, Ivonne:
Centro de Investigación Científica de Yucatán, A.C. Calle 43 No 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida, Yucatán C.P. 97205, Mexico
Ctr Invest Cient Yucatan AC, Calle 43 130 X 32 & 34, Merida 97205, Yucatan, Mexico
Alfaro, Alejandra:
Centro de Investigación Científica de Yucatán, A.C. Calle 43 No 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida, Yucatán C.P. 97205, Mexico
Ctr Invest Cient Yucatan AC, Calle 43 130 X 32 & 34, Merida 97205, Yucatan, Mexico
Andueza-Noh, Ruben H.:
CONACYT-Instituto Tecnológico de Conkal, Avenida Tecnológico s/n Conkal, Yucatán, Mérida, Yucatán C.P. 97345, Mexico
CONACYT, Inst Tecnol Conkal, Ave Tecnol S-N Conkal, Merida 97345, Yucatan, Mexico
Mora-Olivo, Arturo:
Instituto de Ecología Aplicada, Universidad Autónoma de Tamaulipas, Ciudad Victoria, Tamaulipas, Mexico
Univ Autonoma Tamaulipas, Inst Ecol Aplicada, Ciudad Victoria, Tamaulipas, Mexico
Chavez-Pesqueira, Mariana:
Centro de Investigación Científica de Yucatán, A.C. Calle 43 No 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida, Yucatán C.P. 97205, Mexico
Ctr Invest Cient Yucatan AC, Calle 43 130 X 32 & 34, Merida 97205, Yucatan, Mexico
Ibarra-Morales, Ariadna:
Centro de Investigación Científica de Yucatán, A.C. Calle 43 No 130 x 32 y 34, Col. Chuburná de Hidalgo, Mérida, Yucatán C.P. 97205, Mexico
Ctr Invest Cient Yucatan AC, Calle 43 130 X 32 & 34, Merida 97205, Yucatan, Mexico
Moore, Michael J.:
Department of Biology, Oberlin College, Oberlin, OH, United States
Oberlin Coll, Dept Biol, Oberlin, OH 44074 USA
Flores-Olvera, Hilda:
Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Apdo. Postal 70-367, Ciudad de México, C.P. 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Biol, Dept Bot, Apdo Postal 70-367, Mexico City 04510, DF, Mexico
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