Genetic homogenization of the nuclear ITS loci across two morphologically distinct gentians in their overlapping distributions in the Qinghai-Tibet Plateau

NWIPB OpenIR

	Genetic homogenization of the nuclear ITS loci across two morphologically distinct gentians in their overlapping distributions in the Qinghai-Tibet Plateau
	Hu, Quanjun ; Peng, Huichao ; Bi, Hao ; Lu, Zhiqiang ; Wan, Dongshi ; Wang, Qian ; Mao, Kangshan
	2016-09-30
发表期刊	SCIENTIFIC REPORTS
摘要	Interspecific hybridization and introgression can lead to partial genetic homogenization at certain neutral loci between morphologically distinct species and may obscure the species delimitation using nuclear genes. In this study, we investigated this phenomenon through population genetic survey of two alpine plants (Gentiana siphonantha and G. straminea) in the Qinghai-Tibet Plateau, where the distributions of two species are partly overlapped. We identified two clusters of chloroplast DNA haplotypes which correspond to the two species, and three clusters of ITS ribotypes. In addition to clusters specific to each species, the third ITS cluster, which was most likely derived from hybridization between the other two clusters and subsequent recombination and concerted evolution, was widely shared by two species in their adjacent areas. In contrast to the morphological distinctiveness of the two species, interspecific gene flow possibly led to genetic homogenization at their ITS loci. The new ITS lineage recovered for species in adjacent areas is distinctly different from original lineages found in allopatric areas. These findings may have general implications for our understanding of cryptic changes at some genetic loci caused by interspecific gene flow in the history, and they indicate that species delimitation should be based on a combination of both nuclear and chloroplast DNA sequence variations.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/22696
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Hu, Quanjun,Peng, Huichao,Bi, Hao,et al. Genetic homogenization of the nuclear ITS loci across two morphologically distinct gentians in their overlapping distributions in the Qinghai-Tibet Plateau[J]. SCIENTIFIC REPORTS,2016.
APA	Hu, Quanjun.,Peng, Huichao.,Bi, Hao.,Lu, Zhiqiang.,Wan, Dongshi.,...&Mao, Kangshan.(2016).Genetic homogenization of the nuclear ITS loci across two morphologically distinct gentians in their overlapping distributions in the Qinghai-Tibet Plateau.SCIENTIFIC REPORTS.
MLA	Hu, Quanjun,et al."Genetic homogenization of the nuclear ITS loci across two morphologically distinct gentians in their overlapping distributions in the Qinghai-Tibet Plateau".SCIENTIFIC REPORTS (2016).