摘要
用RAPD标记对来自欧美地区及中国市场常见等的共计40份多花黑麦草(Lolium multiflorum L.)种质资源材料,进行遗传变异及多样性研究.用18个能扩增出高度重复性条带的引物对40份材料总DNA进行PCR扩增,其结果如下:(1)共扩增出307条清晰可辨的条带,其中270条带(占87.95%)具有多态性;多态性信息含量(PIC)范围0.387(S3)到0.499(S48),其平均值为0.478.(2)供试材料间遗传相似系数(GS)在0.59到0.93之间,平均为0.75,其中国外品种(P,75.24%)和引进品种(P,60.59%)类群遗传多样性较高,表明供试多花黑麦草种质遗传变异较低.(3)根据结果进行聚类及主成分分析,表明利用RAPD标记基本上可将40份多花黑麦草材料按地理来源和品种类型聚为一类.
Genetic diversity and genetic variation of 40 accessions of Lolium multiflorum L. collected from Europe, America and China are analyzed using randomly amplified polymorphic DNA (RAPD) molecular markers with 18 RAPD primers. The following results are obtained. (I)307 discernible DNA fragments are generated with 291(78. 65%) being polymorphic, the polymorphic information contents (PIC) ranged from 0. 387(S3) to 0. 499(S48) with an average of 0. 478. (2) The genetic similarity (GS) among all accessions ranged from 0. 59 to 0. 93 with an average of 0. 75, and genetic diversity are observed in abroad-cultivar (P, 75. 24%) and imported-cultivar (P, 60. 26%) groups. These results suggest that there is a poor genetic diversity among all Lolium multiflorum L. accessions tested. (3) Based on the cluster and principal component analysis, it suggests that RAPD markers can separate 40 accessions into cultivars and wild clearly, and the accessions from the same origin frequently clustered into one group.
出处
《西南民族大学学报(自然科学版)》
CAS
2011年第2期228-234,共7页
Journal of Southwest Minzu University(Natural Science Edition)
基金
国家重点基础研究发展计划973项目(编号:2007CB108907)
现代农业产业技术体系建设专项资金资助
关键词
多花黑麦草
种质资源
RAPD
遗传变异
Lolium multiflorum L.
germplasm resource
RAPD
genetic diversity