甘蓝型油菜细胞质雄性不育三交种优势潜力分析

甘蓝型油菜细胞质雄性不育三交种和相应单交种进行了对比,结果表明:三交种的总体平均产量略低于单交种,但两者差异不显著,产量最高的组合是单交种09×412,居第二位的是三交种09A×10B×355.与相应的两个单交种相比较,25%的三交种比其两个单交种具有较明显的优势,33.3%的三交种杂种优势介于两个单交种之间,其余41.7%的三交种优势低于两个单交种.12个三交种的各性状株间变异系数平均值除单株角果数和角粒数较明显高于单交种的平均值外,其它性状株间变异系数平均值相当.三交种的整齐性略差于相应的两个单交种,而抗倒性和抗菌核病能力强于相应的两个单交种或介于两个单交种之间.

Heterosis potential analysis of cytoplasmic male sterile three-way crosses hybrids in Brassica napus

A comparison between cytoplasmic male sterile three-way cross and single-cross hybrids was studied in Brassica napus. The result showed that , the highest yield in all of the combinations was one single cross hybrid, the second one was three-way cross hybrid. The average yield of three-way cross hybrids was little lower than that of single cross hybrids. Comparing to the corresponding two single cross hybrids, 25% of three-way cross hybrids had higher heterosis, 41.7% of them had lower heterosis , and 33.3% of them had the heterosis between those of two single cross hybrids. The average plant CV(%) of 12 three-way cross hybrids in 7 agronomic characters had little difference between the three-way cross hybrids and single-cross hybrids except pods per plant and seeds per pod which were higher. Comparing to each three-way cross hybrid with the corresponding two single cross hybrids, the uniformity of three-way cross hybrids was worse than that of the single cross hybrids. Three-way cross hybrids had better resistance to Sclerotinia sclerotiorum and lodging than those of their corresponding two single cross hybrids.