Multiple evidences of past evolution are hidden in nrDNA of Juniperus arizonica and J. coahuilensis populations in the trans-Pecos, Texas region

摘要

Geographical analysis of variation in nrDNA polymorphisms of J. arizonica and J. coahuilensisin the trans-Pecos, TX region showed multiple patterns of hybridization, both modem and relictual(Pleistocene) introgression, incomplete lineage sorting and relictual hybridization. The concept thatnrDNA from a single plant could harbor multiple evidences of past evolution appears to be novel. TotalnrDNA polymorphisms were maximal in the Ft. Davis, Alpine, Marfa trans-Pecos area and on thegranitic rocks at Hueco Tanks State Park, TX.