Geographic isolation and long-distance gene flow influence the genetic structure of the blue fan palm Brahea armata (Arecaceae)
Por:
Perez-Alquicira, Jessica, Wehncke, Elisabet V., Garcia-Loza, Gustavo A., Carstens, Bryan C., Dominguez, Cesar A., Perez-Ishiwara, Ruben, Molina-Freaner, Francisco E., Zamora-Tavares, Maria del Pilar, Rico, Yessica, Cabrera-Toledo, Danae, Vargas-Ponce, Ofelia, Rodriguez, Aaron, Ezcurra, Exequiel
Publicada:
1 ene 2023
Ahead of Print:
1 mar 2023
Categoría:
Plant science
Resumen:
The formation of the Baja California Peninsula (BCP) has impacted the
microevolutionary dynamics of different species in ways that depend on
biological traits such as dispersal capacity. Plants with relatively low
levels of vagility have exhibited high genetic divergence between the
BCP and Continental mainland. Brahea armata (Arecaceae) is a palm
species inhabiting the northern part of the BCP and Sonora; its
distribution occurs in isolated oases of vegetation. We aimed to
evaluate the influence of the formation of the BCP on the genetic
structure of B. armata using nuclear microsatellites and chloroplast
markers (cpDNA) to compare patterns of genetic diversity and structure
with previous published studies. Because gene flow through seeds is
usually more limited compared to pollen flow, we expect to find stronger
genetic structure at (cpDNA) than at nuclear markers. Moreover, larger
genetic structure might also be explained by the smaller effective
population size of cpDNA. We analyzed six microsatellite markers and two
cpDNA regions. The main results indicated high levels of genetic
differentiation among isolated populations located in the BCP, while low
genetic differentiation was found between southern populations of the
BCP and Sonora, suggesting long distance gene flow. In contrast,
chloroplast markers indicated high levels of genetic structure between
BCP and Sonora populations, suggesting asymmetrical gene flow between
pollen (measured by nuclear microsatellites) and seed (cpDNA markers).
This study provides valuable information on genetic diversity of B.
armata that can be relevant for conservation and management; and
develops microsatellites markers that can be transferred to other Brahea
species.
Filiaciones:
Perez-Alquicira, Jessica:
Univ Guadalajara, Ctr Univ Ciencias Biol & Agr, Dept Bot & Zool, Lab Nacl Identificac & Caracterizac Vegetal, Camino Ingn Ramon Sanchez Padilla 2100, Zapopan 45200, Jalisco, Mexico
CONACYT, Mexico City, DF, Mexico
Wehncke, Elisabet V.:
Univ Autonoma Estado Morelos, Ctr Invest Biodivers & Conservac, Ave Univ 1001, Cuernavaca 62209, Morelos, Mexico
Garcia-Loza, Gustavo A.:
Univ Guadalajara, Ctr Univ Ciencias Biol & Agr, Dept Bot & Zool, Lab Nacl Identificac & Caracterizac Vegetal, Camino Ingn Ramon Sanchez Padilla 2100, Zapopan 45200, Jalisco, Mexico
Carstens, Bryan C.:
Ohio State Univ, Dept Evolut Ecol & Organismal Biol, 1315 Kinnear Rd, Columbus, OH 43212 USA
Ohio State Univ, Museum Biol Divers, 1315 Kinnear Rd, Columbus, OH 43212 USA
Dominguez, Cesar A.:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, Mexico
Perez-Ishiwara, Ruben:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City 04510, DF, Mexico
Molina-Freaner, Francisco E.:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Biodivers, Hermosillo 83250, Sonora, Mexico
Zamora-Tavares, Maria del Pilar:
Univ Guadalajara, Ctr Univ Ciencias Biol & Agr, Dept Bot & Zool, Lab Nacl Identificac & Caracterizac Vegetal, Camino Ingn Ramon Sanchez Padilla 2100, Zapopan 45200, Jalisco, Mexico
Rico, Yessica:
CONACYT, Mexico City, DF, Mexico
Inst Ecol AC, Red Divers Biol Occidente Mexicano, Patzcuaro, Michoacan, Mexico
Cabrera-Toledo, Danae:
Univ Guadalajara, Ctr Univ Ciencias Biol & Agr, Inst Bot, Dept Bot & Zool, Ramon Padilla Sanchez 2100, Zapopan 45200, Jalisco, Mexico
Vargas-Ponce, Ofelia:
Univ Guadalajara, Ctr Univ Ciencias Biol & Agr, Inst Bot, Dept Bot & Zool, Ramon Padilla Sanchez 2100, Zapopan 45200, Jalisco, Mexico
Rodriguez, Aaron:
Univ Guadalajara, Ctr Univ Ciencias Biol & Agr, Inst Bot, Dept Bot & Zool, Ramon Padilla Sanchez 2100, Zapopan 45200, Jalisco, Mexico
Ezcurra, Exequiel:
Univ Calif Riverside, Dept Bot & Plant Sci, 2142 Batchelor Hall, Riverside, CA 92521 USA
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