Phylogeographic analyses of a widely distributed : Further evidence for the existence of glacial refugia of cool-temperate deciduous trees in northern East Asia.

Despite several phylogeographic studies had provided evidence to support the existence of glacial refugia of cool-temperate deciduous trees in northeast China, the species used in these studies were limited by the species ranges, which could not exclude the possibility that northern populations were the colonists from southern refugial populations during the last glacial maximum (LGM). Here, we estimated the nucleotide variation in , a widespread species distributed in Eurasia. Three groups in northeast, central, and southwest China were constructed according to the simulation results from SAMOVA, composition of chloroplast haplotypes and structure results.

Phylogenetic and Taxonomic Status Analyses of the Abaso Section from Multiple Nuclear Genes and Plastid Fragments Reveal New Insights into the North America Origin of (Salicaceae).

Although, the Abaso section is widely accepted as an independent section, the taxonomic status of (section Abaso) has not yet been resolved due to the limited availability markers and/or the lack of specimens in previous studies. Thirty-one poplar species that represent six sections of the genus were sampled, and 23 single-copy nuclear DNA and 34 chloroplast fragments were sequenced. The present study obtained two updated phylogenies of .