Recolonization and radiation in Larix (Pinaceae): evidence from nuclear ribosomal DNA paralogues

Molecular Ecology
Xiao-Xin Wei, Xiao-Quan Wang

Abstract

Gene paralogy frequently causes the conflict between gene tree and species tree, but sometimes the coexistence of a few paralogous copies could provide more markers for tracing the phylogeographical process of some organisms. In the present study, nrDNA ITS paralogues were cloned from all but one species of Larix, an Eocene genus having two sections, Larix and Multiserialis, with a huge circumboreal distribution and an Eastern Asia-Western North America disjunction, respectively. A total of 96 distinct clones, excluding five putative pseudogenes or recombinants, were obtained and used in the gene genealogy analysis. The clones from all Eurasian species of section Larix are mixed together, suggesting that recolonization and recent morphological differentiation could have played important roles in the evolution of this section. In contrast, the species diversification of the Eurasian section Multiserialis may result from radiation in the east Himalayas and its vicinity, considering extensive nrDNA founder effects in this group. Our study also suggests that the distribution pattern analysis of members of multiple gene family would be very useful in tracking the evolutionary history of some taxa with recent origin or rapid radiatio...Continue Reading

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Citations

Jul 30, 2008·Journal of Molecular Evolution·Maria Rosario García-Gil
Aug 28, 2012·Journal of Biosciences·J PurkayasthaV Veer
Nov 15, 2011·BMC Genomics·Wenxuan LiuDaniel G Peterson
Jun 29, 2007·Molecular Phylogenetics and Evolution·Xian-Zhao KanXiao-Quan Wang
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Feb 26, 2014·Molecular Phylogenetics and Evolution·Xiao-Quan Wang, Jin-Hua Ran
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Feb 9, 2017·Scientific Reports·Qinggang WangZhiheng Wang
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Jan 5, 2020·Mycologia·Gang WuZhu L Yang
Dec 1, 2020·Annals of Botany·Yunheng JiJiahui Chen

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