Natural hybridization and introgression in sympatric Ligularia species (Asteraceae, Senecioneae)
Yu, Jiao-Jun1,2; Kuroda, Chiaki3; Gong, Xun1
2011-09-01
发表期刊JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN1674-4918
卷号49期号:5页码:438-448
摘要The difficulty in clarifying species of genus Ligularia Cass. has been attributed to rapid and continuous allopatric speciation in small and isolated populations, combined with interspecific diploid hybridization in the Qinghai-Tibetan Plateau and adjacent areas. However, no concrete example has been reported to prove this hypothesis. We studied a natural mixed population of six species of Ligularia in which some individuals were morphologically intermediate between L. subspicata and L. nelumbifolia. Based on DNA sequences (trnC-F, trnL-rpL32, trnQ-5' rps16, trnK-rps16, and internal transcribed spacer) and inter-simple sequence repeat data, we concluded that putative hybrids are primarily products of hybridization between L. nelumbifolia and L. subspicata. The other four species or additional, unknown species may also be involved in hybridization. This hybridization is bidirectional but asymmetrical. Hybrid individuals were mostly the first generation, but F-2 and later-generation hybrids were also present. Moreover, the backcrossed individuals detected indicate that natural gene flow occurs among at least three Ligularia species. Hybrids may become stabilized to form new species or may function as intermediates in evolutionary diversification.
关键词Chloroplast Fragments Issr Markers Ligularia Natural Hybridization Nuclear Ribosomal Its
资助信息National Natural Science Foundation of China[30870242]; National Basic Research Program of China (973 Program)[2007CB411600]
学科领域Plant Sciences
DOI10.1111/j.1759-6831.2011.00150.x
收录类别SCI
语种英语
WOS研究方向Plant Sciences
WOS类目Plant Sciences
WOS记录号WOS:000295322200007
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被引频次:13[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/5295
专题资源植物与生物技术所级重点实验室
作者单位1.Chinese Acad Sci, Key Lab Econ Plants & Biotechnol, Kunming Inst Bot, Kunming 650201, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Rikkyo Univ, Dept Chem, Tokyo 1718501, Japan
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Yu, Jiao-Jun,Kuroda, Chiaki,Gong, Xun. Natural hybridization and introgression in sympatric Ligularia species (Asteraceae, Senecioneae)[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2011,49(5):438-448.
APA Yu, Jiao-Jun,Kuroda, Chiaki,&Gong, Xun.(2011).Natural hybridization and introgression in sympatric Ligularia species (Asteraceae, Senecioneae).JOURNAL OF SYSTEMATICS AND EVOLUTION,49(5),438-448.
MLA Yu, Jiao-Jun,et al."Natural hybridization and introgression in sympatric Ligularia species (Asteraceae, Senecioneae)".JOURNAL OF SYSTEMATICS AND EVOLUTION 49.5(2011):438-448.
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