香梨自交后代的遗传表现

Inheritance of Selfing Progeny of Xiangli (Pyrus. bretschneideri. Rehd)

本文以香梨自交后代9个株系实生树为试材，对其果实经济性状、过氧化物（POD）同工酶酶谱、花粉形态进行了观测。结果表明：香梨自交后代在许多经济性状上表现中庸回归；果面红晕属于质量性状遗传；POD酶谱的一致性证明了自交纯化基因型的遗传效应；自交后代较高的雄性不育率反映了异花授粉植物雄性不育的普遍性。本试验也证明了花粉器官的保守性。

Economic characters of fruit, peroxidase (POD) isozymic patterns, and pollen extrastructure of selfing progeny of Xiangli (Pyrus. bretschneideri. Rehd)were studied in the paper. The results indicated that the inheritance of many economic characters of fruit tended to be middle and regression. Red color on the fruit surface belonged to qualitative character inheritance. The consistency of POD isozymic patterns proved selfing was an useful way to purify genotype. High male-sterility rate showed that male-sterility was common in cross-pollinated plants. The conservatism of pollen was observed in the study,too.