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Systematic position of the enigmatic genus Sheareria (Asteraceae)-evidence from molecular, morphological and cytological data
Gao, Tian-Gang1; Wang, Wei1; Bayer, Randall J.2; Li, De-Zhu3
2009-08-01
发表期刊TAXON
卷号58期号:3页码:769-780
摘要The systematic position of the monoecious rheophyte, Sheareria (Asteraceae), a genus endemic to China, has been long disputed and never rigorously examined. In this study, two molecular datasets (trnL-F, ITS), Plus morphological and cytological characters, were used to assess the systematic position of Sheareria. The broader phylogenetic analyses based on the trnL-F data placed Sheareria in the tribe Astereae with strong support. This placement was also supported by the lanceolate style, "Asteroid type" ligule epidermis, yellow anthers, green achenes, and basic chromosome number of x = 9. Analysis of the tribe Astereae based oil the ITS dataset showed that Sheareria and three East Asian genera (Kalimeris, Aster, Rhynchospermum) formed a strongly Supported clade characterized by flat, 2-ribbed, glandular disc achenes. Detailed morphological comparisons indicate that Sheareria is more similar to Kalimeris than to Rhynchospermum. Within this clade, Sheareria is distinguished from other genera by its monoecious breeding system (vs. gynomonoecious). Based on fossil and geological evidence, the development of monoecy in Sheareria is discussed. Within Sheareria, only one species, S. nana, is recognized; S. leshanensis, a newly described species, is placed in synonymy.
关键词Astereae Cytology Molecular Phylogeny Morphology Sheareria
资助信息National Natural Science Foundation of China [30670148]
学科领域Plant Sciences ; Evolutionary Biology
收录类别SCI
语种英语
WOS研究方向Plant Sciences ; Evolutionary Biology
WOS类目Plant Sciences ; Evolutionary Biology
WOS记录号WOS:000269774900007
引用统计
被引频次:3[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/151853/14103
专题中国西南野生生物种质资源库
作者单位1.Chinese Acad Sci, Inst Bot, State Ke Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
2.Univ Memphis, Dept Biol, Memphis, TN 38152 USA
3.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China
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GB/T 7714
Gao, Tian-Gang,Wang, Wei,Bayer, Randall J.,et al. Systematic position of the enigmatic genus Sheareria (Asteraceae)-evidence from molecular, morphological and cytological data[J]. TAXON,2009,58(3):769-780.
APA Gao, Tian-Gang,Wang, Wei,Bayer, Randall J.,&Li, De-Zhu.(2009).Systematic position of the enigmatic genus Sheareria (Asteraceae)-evidence from molecular, morphological and cytological data.TAXON,58(3),769-780.
MLA Gao, Tian-Gang,et al."Systematic position of the enigmatic genus Sheareria (Asteraceae)-evidence from molecular, morphological and cytological data".TAXON 58.3(2009):769-780.
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