甘蓝型油菜杂交种亲本的遗传多样性评价

Evaluation of the Genetic Diversity of Hybrid Parents in Brassic napus

利用SSR和ISSR分子标记对18份不育系、21份恢复系和11份对照品种共50份甘蓝型油菜进行了遗传多样性评价。UPGMA聚类结果显示,50份材料被聚为四大类群,其中所有的不育系聚在第四大类,恢复系都聚在了其它三大类中。不育系又分为2个亚类,其中核不育系聚为一亚类(除1471AB外),而所有的细胞质雄性不育系均聚为另一亚类。不育系间的遗传差异比恢复系间小。

Genetic diversity of 50 Brassic napus varities including 18 sterile lines, 21 restorer lines and 11 check cultivars was estimated by SSR and ISSR. The UPGMA results showed that 50 Brassica napus varities were divided into 4 groups. The restorer lines tested were classified into Group I-III respectively; The sterile lines tested were classified into Group IV. In addition, The sterile lines could be further divided into two subgroups: except 1471AB, all genic male sterile lines were in subgroup I, 1471AB and all cytoplasmic male sterile lines were in subgroup II. The UPGMA results also indicated that the restorer lines had more genetic diversity than the sterile lines.