A Study on Karyotypes of 6 Species of Elymus in China

Shi Ying, Kuo Pen-Chao, Li Jian-Hua

Received:1900-01-01 Revised:1900-01-01 Online:1989-05-10 Published:1989-05-10
Contact: Shi Ying

Abstract:

The present paper deals with the karyotype analysis of 6 species of Elymus

which are native to Qinghai-Tibetan plateau. The number of somatic chromosomes in root-

tip cells of the 6 species and their karyotypes are reportad here for the first time, and they are

all hexaploid, with 2n=6x=42. The karyotype formulae are as follows: E. melantherus,

2n=6x=42=32m+10sm, E. kengii, 2n=6x=42=34m+8sm, E grandiglumis, 2n=6x=42=

30 m+12 sm, E. laxiflorus, 2n=6x=42=32 m +10 sm, E. kokonoricus, 2n+6x=42=34 m

+8 sm, E. longiglumis, 2n+6x=42=34 m+8 sm. No satellites have been founded in the 6

species and all the karyotypes belong to 1B or 2B type:

Key words: Elymus, karyotypes

Shi Ying, Kuo Pen-Chao, Li Jian-Hua. A Study on Karyotypes of 6 Species of Elymus in China[J]. .

[1]	LU Bao-Rong. Revision of two Elymus species (Poaceae) [J]. , 2002, 40(6): 539-545.
[2]	ZHOU Yong-Hong, ZHENG You-Liang, YANG Jun-Liang, YAN Ji, JIA Ji-Zeng. Phylogenetic relationships among ten Elymus species based on random amplified polymorphic DNA [J]. , 1999, 37(5): 425-432.
[3]	Lu Bao-rong. A Study on Systematic Relationships Between Elymus and Hordeum (Poaceae) [J]. , 1997, 35(3): 193-207.
[4]	Lu Bao-rong. Morphological Identification of Elymus sibiricus, E. nutans, and E. burchan-buddae, and Their Genomic Relationships [J]. , 1994, 32(6): 504-513.

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