Inheritance Analysis of Main Biological Traits during Maturity for Brassica napus L

Inheritance analysis of six biological traits was conducted using 31 rapeseed lines with designated-cross method.Results showed that the mean performance of six biological traits of F1 progeny were better than their parents.The inheritance of stem mass,biological yield for aboveground part,and harvest index were main as the additive effect,but that of seed mass and mass of seed and silique wall were main as the dominance effect.There is the great difference among the mean heterosis of the different biological traits,of which seed mass and mass of seed and silique wall were the best.The correlated analysis showed that coordinating the relationship between biological yield for aboveground part and harvest index is critical to getting the high yield of rapeseed.