Chromosome counts and karyotypes in Chaetoseris and Stenoseris (Asteraceae-Cichorieae) from the Hengduan Mountains of SW China
Deng, Tao1; Meng, Ying1,2; Sun, Hang1; Nie, Ze-Long1
2011-07-01
发表期刊JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN1674-4918
卷号49期号:4页码:339-346
摘要

Chaetoseris and Stenoseris are two morphologically close genera from the tribe Cichorieae of the sunflower family and they are endemic in alpine eastern Himalayas to the Hengduan Mountains of SW China. Mitotic chromosome numbers and karyotypes are reported for 12 populations representing eight species of Chaetoseris and two species of Stenoseris from the Hengduan Mountains region. Eight species are new and the other two provide confirmation of previous reference. All Chaetoseris and Stenoseris taxa are diploidy with 2n = 16 and their basic number is tentatively suggested as x = 8. Karyotypes of Chaetoseris and Stenoseris are similar to each other with 2A and 2B for the former and 2A for the latter. Cytological data of chromosomal numbers and karyotypes support a close relationship of the two genera. Currently no polyploids are found for these two genera and it seems that polyploidization has played a minor role in their evolutionary speciation in the Hengduan Mountains region.

关键词Asteraceae Chaetoseris Cichorieae Hengduan Mountains Karyotype Stenoseris
资助信息National Natural Science Foundation of China[30770167, 30625004, 40930209]; Ministry of Science and Technology of China[2007FY110100]
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/3910
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
作者单位1.Chinese Acad Sci, Key Lab Biodivers & Biogeog, Kunming Inst Bot, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res Kunming, Kunming 650204, Peoples R China
推荐引用方式
GB/T 7714
Deng, Tao,Meng, Ying,Sun, Hang,et al. Chromosome counts and karyotypes in Chaetoseris and Stenoseris (Asteraceae-Cichorieae) from the Hengduan Mountains of SW China[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2011,49(4):339-346.
APA Deng, Tao,Meng, Ying,Sun, Hang,&Nie, Ze-Long.(2011).Chromosome counts and karyotypes in Chaetoseris and Stenoseris (Asteraceae-Cichorieae) from the Hengduan Mountains of SW China.JOURNAL OF SYSTEMATICS AND EVOLUTION,49(4),339-346.
MLA Deng, Tao,et al."Chromosome counts and karyotypes in Chaetoseris and Stenoseris (Asteraceae-Cichorieae) from the Hengduan Mountains of SW China".JOURNAL OF SYSTEMATICS AND EVOLUTION 49.4(2011):339-346.
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