甘蓝型细胞质雄性不育杂交油菜的育性不稳定性及其对产量的影响

Fertility Instability and Its Effection on Yield in Cytoplasmic Male-Sterile Hybrid Rapeseed (Braissic napus.L)

选用甘蓝型油菜细胞质雄性不育系统的3个油菜杂交种,田间考察各杂交种F1的育性稳定情况及其对产量的影响。结果表明:3个油菜杂交种F1群体均有不育株和半不育株出现,它们的花器形态呈显著差异。3个杂交种F1群体中不育株率分别为5%、3%与11%,不育株的单株有效角果数少,单株产量分别为正常可育株的11.42%、10.45%与5.73%;导致3个杂交种F1群体产量分别下降8.60%、13.93%与17.38%。

Three cytoplasmic male-sterile hybrid rapeseeds (Braissic napus.L)were tested to estimate their fertility instability and its effection on the yield of hybrids.The results showed that all the three hybrids showed different fertility instability which was already related to the changes in flower organs. The percentage of male-sterile plants in these F1 hybrids reached 5%,3%,11%,respectively. Number of effective pods were fewer in male-sterile plant; Yield of per plant in sterile plants were 11.42%,10.45%,5.73% as compared with normal hybrid plants. Therefore, yields of the three hybrids dropped by 8.60%,13.93%,17.38% ,respectively.