关键词: 气温日较差, 气温日较差, 变化特征, 气象因子, 相关性

Abstract: To study the flower characters inheritance rule of red flower Phalaenopsis, and solve the problem of fungoid disease and late florescence in common commercial variety P.‘Big chili’, the hybrids were obtained from the reciprocal cross from P.‘Big chili’and P.‘Red swan’. Results showed that distinct segregation appeared in the F1 generation of reciprocal cross. The depth of red was in gradient change, and the segregation regular of reciprocal cross was the same. The flower color was controlled by several pairs of genes, mainly dominant genes, and the more the dominant genes existed, the deeper red the flowers were. Moreover, the flower heart color, the decorative pattern and leaf characters might be dominant heredity. The 3 characters of F1 generation of‘Big chili’and‘Red swan’were more like thos e of‘Red swan’, which could improve the leaf resistance of‘Big chili’to reduce the fungoid disease, and the rate of fungoid disease caused by honeydew secreting on leaves in F1 generation could be below 25%. The average value of flower diameter, flower number and inflorescence length were all below the parents, and the mid- parent and positive heterosis were not obvious.