Genetic Limitation and Conservation Implications in <i>Tetracentron sinense</i>: SNP-Based Analysis of Spatial Genetic Structure and Gene Flow.

ABSTRACT: The present research investigates the fine-scale spatial genetic structure (SGS) and gene flow dynamics in the endangered relict tree Tetracentron sinense, a keystone species in China's montane ecosystems facing severe habitat fragmentation and genetic erosion. Utilizing genome-wide SNPs from 378 individuals across four natural populations (BMXS, MGFD, GLGS, SXFP), derived from ddRAD-seq, we quantified genetic diversity, SGS (Sp statistic), and dispersal patterns through spatial autocorrelation, parentage analysis, and age-class stratification. Results indicated critically low heterozygosity (observed heterozygosity, H_O = 0.019-0.022) and high inbreeding coefficient (Fis = 0.147-0.304), with moderate SGS (Sp = 0.0076-0.021) suggesting restricted gene flow (e

SUBMITTER: Liu X 

PROVIDER: S-EPMC12467406 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature