甘蓝型油菜矮秆突变体bndf-1的遗传鉴定及利用潜力分析

油菜矮秆资源的研究和利用是解决目前油菜品种易倒伏问题并实现机械化操作的有效途径之一。在甘蓝型油菜杂交选育后代中发现了一株高75 cm左右、株型紧凑、1次分枝明显增多的矮秆突变体，暂命名为bndf-1(Brassica napus L., dwarf-1)。该突变体与高秆常规种品系0003、0826的正反交F1株高小于中亲值而偏向矮秆亲本，相应F2分离群体高矮株分离比符合1:3的期望比值，表明bndf-1的矮秆性状受一对不完全显性核基因控制。对正反交F1的产量性状分析表明，该矮秆资源具有较好的生产应用前景。

The Identification and Application of Dwarf Mutation bndf-1 in Brassica napus

Dwarfism in oilseed rape is one of the main strategies to improve lodging resistance and be suitable for the mechanized operation. A dwarf mutation bndf-1with plant height of about 75cm discovered from hybrid offspring showed obviously decreased height and increased numbers of primary branches in comparison with the wild type. The mutant also showed other values such as compact construct, strong stem stalk and as well as much more primary branches than the wild type. Genetic analysis on F1 and F2 populations derived from reciprocal crosses between bndf-1 with high-stalk lines 0003 and 0826, respectively, indicated that the dwarfism was controlled by an incomplete dominant gene. In addition, the analysis of F1 yield traits indicated that the dwarfism of bndf-1 has great potential to be used in breeding.