甘蓝型油菜雄性不育系性状关联性分析

目的]评估甘蓝型油菜雄性不育系性状间的关系。方法]采用半双列杂交方法,利用10个甘蓝型油菜隐性细胞核雄性不育系为材料配制了45个杂交组合。45的杂交组合和10个亲本材料于2007-2008年在贵阳种植并用于评估。结果]植株高度、株有效角果数、初花期和成熟期与产量成显著正相关,相关系数分别为0.644,0.583,0.281和0.341;每角粒数与种子大小（千粒重）成显著负相关（-0.533）。株有效角数、每角粒数、千粒重和植株高度对产量的直接通径系数分别为0.5562、0.4074、0.4813和0.4017。结论]株有效角数、每角粒数、千粒重和植株高度与种子产量成正相关,并对产量有较高的直接贡献。其它性状包括株分枝数、初花期、成熟期和含油量对产量的贡献较低。

Correlation Analysis on Male Sterile Lines Characters in Rapeseed (Brassica napus L.)

Objective] This study was conducted to evaluate the associations of many characters of male sterile lines in Brassica napus L.Method]10 recessive genetic male sterile（RGMS）lines were used as parents to cross in a half diallel cross method to produce 45 single cross hybrids.These 45 crosses and their 10 parents were evaluated at Guiyang during 2007-2008.Result]The positive correlations of seed yield with plant height,pods per plant,days to flowering and days to maturity were significant.Their respective correlation coefficients（r）were 0.644,0.583,0.281 and 0.341.Highly significant and negative correlation was observed between seeds per pod and seed size（-0.533）.Direct path coefficients were observed for pods per plant（0.556 2）,seeds per pod（0.407 4）,1 000-seed weight（0.481 3）,and plant height（0.401 7）to seed yield.Conclusion]Pods per plant,seeds per pod,1 000-seed weight and plant height were positive correlated with seed yield and showed high direct contributions to yield.Other characters including branches per plant,days to flowering,days to maturity and oil content had low contributions to seed yield.