摘要
选用产地来源不同的3份偃麦草的种子为试验材料,采用根尖压片法进行细胞染色体核型分析,旨在为其细胞学特性和演化趋势的研究奠定科学基础。结果表明,来源于俄罗斯列宁格勒的偃麦草种质ER044染色体数目为2n=6X=42,染色体相对长度组成为:4L+14M2+20M1+4S,核型公式为:K(2n)=6X=42=2M+32m+8sm。来源于阿富汗喀布尔的偃麦草种质ER058染色体数目为2n=6X=42,染色体相对长度组成为:2L+20M2+16M1+4S,核型公式K(2n)=6X=42=30m+12sm(2sat)。采自于中国新疆的偃麦草种质ER132染色体数目为2n=6X=42,染色体相对长度组成为:4L+16M2+16M1+6S,核型公式为:K(2n)=6X=42=32m+8sm(4sat)+2st。3份偃麦草种质的染色体核型均属于"2B"类型。
The chromosome karyotypes of three germplasm of Elytrigia repens were studied using the root tip squash method in order to provide the important scientific basis for the researches of cytological characteristics and evolutionary tendency.The results showed that the chromosome type of ER044 growing in Leningred of Russia was K（2n）=6X=42=2M＋32m＋8sm,the composition of relative length chromosomes was 4L＋14M2＋20M1＋4S.The chromosome type of ER058 growing in Kabul of Afghanistan was K（2n）=6X=42=30m＋12sm（2sat）,the composition of relative length chromosomes was 2L＋20M2＋16M1＋4S.The chromosome type of ER132 growing in Xinjiang,China was K（2n）=6X=42=32m＋8sm（4sat）＋2st,the composition of relative length chromosomes was 4L＋16M2＋16M1＋6S.The chromosome karyotypes of three germplasm were belonged to ＂2B＂ types.
出处
《草业学报》
CSCD
北大核心
2011年第4期194-201,共8页
Acta Prataculturae Sinica
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(2008BADB3B01
2008BADB3B05)
北京市农林科学院科技创新能力建设专项(KJCX201101003)资助
关键词
偃麦草
染色体
核型
Elytrigia repens
chromosome
karyotypes
