摘要
对33个不同来源的玉米自交系的遗传多样性进行SSR分析,其结果为,自交系间遗传距离在0.1763-0.9490,平均为0.3228。除贞367遗传距离为大于0.90外,其他32个的遗传距离均小于0.51,表明玉米自交系间遗传基础狭窄。33个自交系的遗传距离按类平均法可聚为6类,其中Ⅱ、Ⅲ和Ⅳ类又分为两个亚类。提高玉米的杂种优势利用水平,必须丰富亲本的遗传基础,扩大其遗传差异。
SSR markers were used to study genetic diversity of 33 lines in maize（Zea mays L. ）, which had different sources. The main results were summarized as follows：The genetic distances between lines were small with an average of 0. 3228,ranged from 0. 1763 -0. 9490. Except the genetic basis of Zhen367 was limited, the lines were classified into six groups according to genetic distance by SSR analysis. The Ⅱ , Ⅲ, and Ⅳ were classified into two subgroups. To increase the heterosis of hybrid maise,the genetic diversity should be enriched and the genetic differences between parental lines should be expanded.
出处
《西南农业学报》
CSCD
北大核心
2009年第1期29-31,共3页
Southwest China Journal of Agricultural Sciences
基金
重庆市重大科技专项水稻玉米良种创新工程项目资助(CSTC2007AB1045)
