Maintenance of species boundaries in three sympatric Ligularia (Senecioneae, Asteraceae) species
Zhang, Ningning1,2; Ma, Yongpeng1; Folk, Ryan A.3; Yu, Jiaojun1; Pan, Yuezhi1; Gong, Xun1
2018-10-01
发表期刊JOURNAL OF INTEGRATIVE PLANT BIOLOGY
ISSN1672-9072
卷号60期号:10页码:986-999
摘要The key process in speciation concerns the formation and maintenance of reproductive isolating barriers between diverging lineages. Although species boundaries are frequently investigated between two species across many taxa, reproductive isolating barriers among multiple species (>2) that would represent the most common phenomenon in nature, remain to be clarified. Here, we use double digest restriction-site associated DNA (ddRAD) sequencing to examine patterns of hybridization at a sympatric site where three Ligularia species grow together and verify whether those patterns contribute to the maintenance of boundaries among species. The results based on the RAD SNP datasets indicated hybridization Ligularia cyathiceps x L. duciformis and L. duciformis x L. yunnanensis were both restricted to F(1)s plus a few first-generation backcrosses and no gene introgression were identified, giving rise to strong reproductive isolation among hybridizing species. Moreover, hybrid swarm simulation, using HYBRIDLAB, indicated the RAD SNP datasets had sufficient discriminatory power for accurate hybrid detection. We conclude that parental species show strong reproductive isolation and they still maintain species boundaries, which may be the key mechanism to maintain species diversity of Ligularia in the eastern Qinghai-Tibetan Plateau and adjacent areas. Moreover, this study highlights the effectiveness of RAD sequencing in hybridization studies.
资助信息National Natural Science Foundation of China
语种英语
资助项目National Natural Science Foundation of China[31470336] ; National Natural Science Foundation of China[31600178]
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/62774
专题中国科学院东亚植物多样性与生物地理学重点实验室
通讯作者Gong, Xun
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA
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Zhang, Ningning,Ma, Yongpeng,Folk, Ryan A.,et al. Maintenance of species boundaries in three sympatric Ligularia (Senecioneae, Asteraceae) species[J]. JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2018,60(10):986-999.
APA Zhang, Ningning,Ma, Yongpeng,Folk, Ryan A.,Yu, Jiaojun,Pan, Yuezhi,&Gong, Xun.(2018).Maintenance of species boundaries in three sympatric Ligularia (Senecioneae, Asteraceae) species.JOURNAL OF INTEGRATIVE PLANT BIOLOGY,60(10),986-999.
MLA Zhang, Ningning,et al."Maintenance of species boundaries in three sympatric Ligularia (Senecioneae, Asteraceae) species".JOURNAL OF INTEGRATIVE PLANT BIOLOGY 60.10(2018):986-999.
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