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题名: Cytological study on Kelloggia (Rubiaceae), an intercontinental disjunct genus between eastern Asia and western North America
作者: Tu, Tie-Yao; Sun Hang(孙航); Bartholomew, Bruce; Nie, Ze-Long
刊名: JOURNAL OF PLANT RESEARCH
关键词: cytology ; Kelloggia ; disjunction ; eastern Asia ; western north America
英文摘要: 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.
出版日期: 2006-07-01
卷号: 119, 期号:4, 页码:397-400
DOI标识: 10.1007/s10265-006-0276-0
语种: 英语
ISSN号: 0918-9440
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/2725
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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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

Recommended Citation:
Tu, TY; Sun, H; Bartholomew, B; Nie, ZL.Cytological study on Kelloggia (Rubiaceae), an intercontinental disjunct genus between eastern Asia and western North America,JOURNAL OF PLANT RESEARCH,2006,119(4):397-400
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