Karyotypical studies on thirteen Iris plants from China

	Karyotypical studies on thirteen Iris plants from China
	Shen Yun-Guang ; Wang Zhong-Lang ; Guan Kai-Yun
通讯作者	Guan, KY (reprint author), Chinese Acad Sci, Inst Bot, Kunming 650204, Peoples R China. guanky@mail.kib.ac.cn
	2007
发表期刊	ACTA PHYTOTAXONOMICA SINICA
ISSN	0529-1526
卷号	45 期号:5 页码:601-618
摘要	Cytological studies were carried out for 13 taxa in the genus Iris from China, of which three species, namely L subdichotoma, L delavayi and L cuniculiformis were endemic to China. The chromosome numbers in somatic cells for each taxon were as follows: L subdichotoma, 2n=42; L japonica, 2n=34; L wattii, 2n=30; L laevigata, 2n=32; L ruthenica var. nana, 2n=42; L collettii, 2n=28; L dolichosiphon and L cuniculiformis, 2n=22; L bulleyana, L delavayi, L chrysographes, L forrestii, and L lactea var. chinensis, 2n=40. The chromosome number and karyotype of L cuniculiformis were reported here for the first time and its karyotype formula was 2n=22=4m+6sm+l2st(2SAT). The karyotype of L dolichosiphon was also firstly reported, whose karyotype formula was 2n=22=4m+12sm+6st. The chromosome number and karyotype of L subdichotoma was newly observed, whose karyotype formula was 2n=42=20m+22sm. Three populations of L ruthenica var. nana from different localities were investigated and all the three populations had the same chromosome numbers different than previously reported. The karyotype formulae for L ruthenica var. nana were shown as follows: Zhongdian population, 2n=42=30m+12sm (2SAT); Lijiang population, 2n=42=28m+l4sm(2SAT); Nixi population, 2n=42=36m+6sm (4SAT). In addition, the 2n chromosome numbers of three subgenera Limniris, Iris and Nepalensis in the genus Iris from present results and previous reports were summarized. The results showed that the chromosome number varied considerably in subgen. Nepalensis, in which L subdichotoma was possibly a key species between the genus Pardanthopsis and subgen. Nepalensis. Chromosome number of I. ruthenica was reported as 2n=84 which was twice as much as its variety I. ruthenica var. nana (2n=42) we observed. By comparing with related groups, L ruthenica is likely to derive from diploid group. Finally, variation of chromosome number and evolutional tendency of karyotype in the genus Iris were also discussed.
关键词	Iris Chromosome Number Karyotype
学科领域	Plant Sciences
收录类别	sci
语种	中文
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/15546
专题	资源植物与生物技术所级重点实验室
推荐引用方式 GB/T 7714	Shen Yun-Guang,Wang Zhong-Lang,Guan Kai-Yun. Karyotypical studies on thirteen Iris plants from China[J]. ACTA PHYTOTAXONOMICA SINICA,2007,45(5):601-618.
APA	Shen Yun-Guang,Wang Zhong-Lang,&Guan Kai-Yun.(2007).Karyotypical studies on thirteen Iris plants from China.ACTA PHYTOTAXONOMICA SINICA,45(5),601-618.
MLA	Shen Yun-Guang,et al."Karyotypical studies on thirteen Iris plants from China".ACTA PHYTOTAXONOMICA SINICA 45.5(2007):601-618.

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