甘蓝型油菜与红菜薹的杂种及其后代遗传变异分析

Genetic Variation Analyses on Brassica napus×Purple-Caitai Hybrids and Their Backcross Progenies

摘要: 本研究采用一种新型甘蓝型油菜细胞质雄性不育系(Eru CMS)(Brassica napus2n=4x=38)与红菜薹(B.campestris L.ssp.chinensis L.var.utilis Tsen et Lee.2n=2x=20)进行远缘杂交,并以红菜薹为轮回亲本连续回交,对甘蓝型油菜细胞质雄性不育系与红菜薹的杂种一代及其回交后代进行植物学性状及品质性状调查测定。结果表明,供体亲本和受体亲本在回交转育过程中发生明显的核置换,其杂交及回交后代的农艺性状及品质性状出现波动,并且随着回交次数的增多,世代越高的材料越相似于轮回亲本红菜薹,而世代越低材料遗传变异范围更大。

Abstract: Distant hybridization of a new kind of cytoplasmic male sterility of Brassica napus(2n=4x=38) and Purple-Caitai was carried out.Purple-Caitai was used as the recurrent parent to continue backcross.Agronomic and quality traits of the hybrids and backcross progenies of Brassica napus×Purple-Caitai were analyzed.The results showed that the donor parent and the recipient parent exhibited nucleus replacement,the values of agronomic traits and quality traits of hybridization and backcross progenies had a certain fluctuation and the higher the generation of material,the more similar to the recurrent parent,while the variation range of lower generation was wide.