Miocene diversification of a golden-thread nanmu tree species (Phoebe zhennan, Lauraceae) around the Sichuan Basin shaped by the East Asian monsoon.

ABSTRACT: Understanding the role of climate changes and geography as drivers of population divergence and speciation is a long-standing goal of evolutionary biology and can inform conservation. In this study, we used restriction site-associated DNA sequencing (RAD-seq) to evaluate genetic diversity, population structure, and infer demographic history of the endangered tree, Phoebe zhennan which is distributed around the Sichuan Basin. Genomic patterns revealed two distinct clusters, each largely confined to the West and East. Despite sympatry of the two genomic clusters at some sites, individuals show little or no evidence of genomic introgression. Demographic modeling supported an initial divergence time between the West and East lineages at ~15.08 Ma with further diversification within the

SUBMITTER: Xiao JH 

PROVIDER: S-EPMC7548194 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature