Molecular evidence for asymmetric hybridization in three closely related sympatric species
Zhang, Ning-Ning1,2,3; Yu, Jiao-Jun2; Wang, Yue-Hua1; Gong, Xun2
2018-02-01
发表期刊AOB PLANTS
ISSN2041-2851
卷号10期号:1页码:ply011
摘要Natural hybridization is common in plants and results in different evolutionary consequences to hybridizing species. Pre- and post-zygotic reproductive isolating barriers can impede hybridization between closely related species to maintain their species integrity. In Northwest Yunnan, three Ligularia species (Ligularia cyathiceps, L. duciformis and L. yunnanensis) and four types of morphologically intermediate individuals were discovered growing together in an area subject to human disturbance. In this study, we used three low-copy nuclear loci to test the natural hybridization hypothesis and the hybridization direction was ascertained by three chloroplast DNA fragments. The results indicated there were two hybridization groups at the study site, L. cyathiceps x L. duciformis and L. duciformis x L. yunnanensis, and two types of morphologically intermediate individuals were produced by L. cyathiceps and L. duciformis, and another two types were produced by L. duciformis and L. yunnanensis, while no hybrids between L. cyathiceps and L. yunnanensis were observed. Both hybridizing groups showed bidirectional but asymmetric hybridization and the factors influencing the symmetry are discussed. Most hybrids produced by the two hybridization groups seemed to be F-1 generation. Hybrids with different morphologies within the same hybridization group showed similar genetic components. The results suggest that although human disturbance may promote natural hybridization among the three Ligularia species bringing them together, hybrids are limited to F(1)s and therefore species boundaries might be maintained.
关键词Asymmetric Hybridization Chloroplast Dna F-1 Generation Ligularia Nuclear Loci Two Hybridization Groups
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/60441
专题植物化学与西部植物资源持续利用国家重点实验室
作者单位1.Yunnan Univ, Sch Life Sci, Plant Sci Inst, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Div & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Zhang, Ning-Ning,Yu, Jiao-Jun,Wang, Yue-Hua,et al. Molecular evidence for asymmetric hybridization in three closely related sympatric species[J]. AOB PLANTS,2018,10(1):ply011.
APA Zhang, Ning-Ning,Yu, Jiao-Jun,Wang, Yue-Hua,&Gong, Xun.(2018).Molecular evidence for asymmetric hybridization in three closely related sympatric species.AOB PLANTS,10(1),ply011.
MLA Zhang, Ning-Ning,et al."Molecular evidence for asymmetric hybridization in three closely related sympatric species".AOB PLANTS 10.1(2018):ply011.
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