SRAP分子标记分析糯玉米自交系的遗传多样性

Genetic Diversity of Wax Corn Inbred Lines by SRAP Molecular Marker

利用SRAP分子标记技术对46个糯玉米自交系进行遗传多样性研究及杂种优势群划分。结果表明:46个糯玉米自交系可分为9个类群,分析结果与这些自交系综合性状的差异性表现基本一致。参照部分糯玉米自交系进行的配合力测试结果来看,高产组合的双亲基本都在不同的类群,而类内杂交较难产生优良的杂交组合,这也从实践角度说明SRAP标记技术对糯玉米杂种优势群的划分是合理可信的。

The genetic diversity and heterosis groups of 46 wax corn inbred lines were classified by the SRAP molecular marker. Results showed that the 46 lines can be divided into 9 groups, which was approximately in accordance with the comprehensive characters of these in- bred lines. The combining ability analysis for some of these inbred lines indicated that the parents of superior crosses were mostly originated from the different groups. Superior cresses hardly appeared in combining parents within the groups, so it was also suggested that the heterosis greup-division of wax corn by SRAP was creditable.