New occurrence of B chromosomes in Rheum tanguticum Maxim. ex Balf. (Polygonaceae)

NWIPB OpenIR

	New occurrence of B chromosomes in Rheum tanguticum Maxim. ex Balf. (Polygonaceae)
	Hu Yanping ; Li Wang ; Yi Li
	2011-07-01
发表期刊	CARYOLOGIA
摘要	A cytogenetic study was conducted on Rheum tanguticum populations from Huangnan Tibetan Autonomous Prefecture, China. The results revealed the chromosome numbers 2n=22 and the karyotype formulae are 2n=22=22m or 2n=22=2sm+20m, belonging to Stebbins 1A type. However, it was interesting to observe metaphases with variable B chromosomes (1, 2, 3, 4, 6, 7) in a few specimens. For the first time, the occurrence of B chromosomes was reported in natural populations of R. tanguticum. The number of B chromosomes in R. tanguticum varied not only among individuals but also within the same root tip.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/38343
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Hu Yanping,Li Wang,Yi Li. New occurrence of B chromosomes in Rheum tanguticum Maxim. ex Balf. (Polygonaceae)[J]. CARYOLOGIA,2011.
APA	Hu Yanping,Li Wang,&Yi Li.(2011).New occurrence of B chromosomes in Rheum tanguticum Maxim. ex Balf. (Polygonaceae).CARYOLOGIA.
MLA	Hu Yanping,et al."New occurrence of B chromosomes in Rheum tanguticum Maxim. ex Balf. (Polygonaceae)".CARYOLOGIA (2011).