Population structure in Quercus suber L. revealed by nuclear microsatellite markers

PeerJ

article

Filipe Sousa¹  Joana Costa¹  Carla Ribeiro¹  Marta Varandas³  Francisco Pina-Martins¹  Fernanda Simões³  José Matos³  Maria Glushkova⁵  Célia Miguel⁶  Maria Manuela Veloso³  Margarida Oliveira⁸  Cândido Pinto Ricardo⁸  Dora Batista¹  Octávio S. Paulo¹ 

[1] Faculdade de Ciências, Universidade de Lisboa, cE3c—Centre for Ecology;RAIZ;Instituto Nacional de Investigação Agrária e Veterinária;Polytechnic Institute of Setúbal;Forest Research Institute of B.A.S., Department of Forest Genetics;Faculdade de Ciências, Universidade de Lisboa, Biosystems & Integrative Sciences Institute;iBET;Universidade Nova de Lisboa ,(ITQB-NOVA), Instituto de Tecnologia Química e Biológica António Xavier;Instituto Superior de Agronomia, Universidade de Lisboa, LEAF—Linking Landscape, Environment, Agriculture and Food

关键词: Cork oak;    Population genetics;    Glacial refugia;    Conservation;    West Mediterranean;   

DOI  :  10.7717/peerj.13565

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Quercus suber L. is a sclerophyllous tree species native to the western Mediterranean, a region that is considered highly vulnerable to increased temperatures and severe dry conditions due to environmental changes. Understanding the population structure and demographics of Q. suber is essential in order to anticipate whether populations at greater risk and the species as a whole have the genetic background and reproductive dynamics to enable rapid adaptation. The genetic diversity of Q. suber has been subject to different studies using both chloroplast and nuclear data, but population structure patterns remain unclear. Here, we perform genetic analyses on Q. suber using 13 nuclear microsatellite markers, and analysed 17 distinct locations across the entire range of the species. Structure analyses revealed that Q. suber may contain three major genetic clusters that likely result from isolation in refugia combined with posterior admixture and putative introgression from other Quercus species. Our results show a more complex structure scenario than previously inferred for Q. suber using nuclear markers and suggest that different southern populations contain high levels of genetic variation that may contribute to the resilience of Q. suber in a context of environmental change and adaptive pressure.

【 授权许可】

CC BY