Cytological study on Kelloggia (Rubiaceae), an intercontinental disjunct genus between eastern Asia and western North America
Tu, Tie-Yao; Sun, Hang; Bartholomew, Bruce; Nie, Ze-Long
2006-07-01
发表期刊JOURNAL OF PLANT RESEARCH
ISSN0918-9440
卷号119期号:4页码:397-400
摘要A cytological study was carried out for the first time on four populations of the only two species of Kelloggia (Rubiaceae), which occur disjunctly in eastern Asia (K. chinensis Franch.) and western North America (K. galioides Torr.). The consistent mitotic prophase chromosome condensation pattern and interphase nuclei type were determined for both species. The chromosome base number of the genus is suggested to be x = 11. The karyotype of 2n = 22 = 2x = 16m + 6sm was examined for both species. The karyotypical asymmetry of 1A and 2A was found in K. chinensis and K. galioides, respectively. According to the predominant evolutionary direction of karyotype asymmetry in angiosperms, K. galioides (2A) seems slightly more evolved than K. chinensis (1A). Our finding is consistent with the hypothesis of the Old World origin of Kelloggia based on molecular study.
关键词Cytology Kelloggia Disjunction Eastern Asia Western North America
收录类别SCI
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/151853/2725
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, Kunming Inst Bot, Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
3.Calif Acad Sci, Dept Bot, San Francisco, CA 94118 USA
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Tu, Tie-Yao,Sun, Hang,Bartholomew, Bruce,et al. Cytological study on Kelloggia (Rubiaceae), an intercontinental disjunct genus between eastern Asia and western North America[J]. JOURNAL OF PLANT RESEARCH,2006,119(4):397-400.
APA Tu, Tie-Yao,Sun, Hang,Bartholomew, Bruce,&Nie, Ze-Long.(2006).Cytological study on Kelloggia (Rubiaceae), an intercontinental disjunct genus between eastern Asia and western North America.JOURNAL OF PLANT RESEARCH,119(4),397-400.
MLA Tu, Tie-Yao,et al."Cytological study on Kelloggia (Rubiaceae), an intercontinental disjunct genus between eastern Asia and western North America".JOURNAL OF PLANT RESEARCH 119.4(2006):397-400.
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