中间偃麦草和长穗偃麦草染色体核型分析  

Analysis of chromosome karyotypes of Elytrigia intermedia and Elytrigia elongate

作　　者：张晓燕[1,2] 毛培春[2] 孟林[2] 张德罡[1] 

机构地区：[1]甘肃农业大学草业学院,甘肃兰州730070 [2]北京市农林科学院北京草业与环境研究发展中心,北京100097

出　　处：《草业科学》2011年第7期1315-1319,共5页Pratacultural Science

基　　金：北京市自然科学基金项目(6082009);"十一五"国家重点科技支撑项目(2008BADB3B05);农业部牧草种质资源保护项目;北京市农林科学院常规育种财政专项

摘　　要：选用从国外引进的中间偃麦草(Elytrigia intermedia)和长穗偃麦草(E.elongata)种子为材料,采用根尖压片法进行细胞染色体核型分析。结果表明,中间偃麦草染色体数目为2n=6x=42,染色体相对长度组成为:10L+10M2+12M1+10S,核型公式为:K(2n)=6x=42=34m+8sm,属于"2B"类型。长穗偃麦草染色体数目为2n=10x=70,染色体相对长度组成为:10L+22M2+30M1+8S,核型公式为:K(2n)=10x=70=38m+22sm+8st+2t,属于"2B"类型。本研究结果可以为中间偃麦草和长穗偃麦草的细胞学特性和遗传机制的研究提供理论依据。The chromosome karyotypes of Elytrigia intermedia and E. elongata were determined by the root tip squash method. This study showed that the chromosome type of E. intermedia was K （2n）=6x=42=34m＋ 8sm, and the composition of relative length chromosomes was 10L＋10M2 ＋ 12M1 ＋ 10S, belonging to 2B type. The chromosome type of E. elongata was K（2n）= 10x=70=38m＋ 22sm＋8st＋ 2t, and the composition of rela- tive length chromosomes was 10L＋22M2 ＋30M1 ＋8S, belonging to 2B type. These results would provide theoretical basis for their cytological characteristics and genetic mechanism research.

关 键 词：中间偃麦草 长穗偃麦草 染色体 核型 

分 类 号：S543.9[农业科学—作物学]