The Effect of Crossing Patterns on the Inheritance and Variation of Wheat Traits: Ⅱ.Parent-Offspring Correlation and Segregation of Grain Quality Characters
Wang Yueguang;Liu Guangtian; Wang Jianshe; Li Baoyun (Dept. of Crop Genetic & Breeding, College of Plant Sci & Tech)
Studies on parent-offspring correlation and distribution of grain quality characters in single cross F2, back cross F1 and three-way cross F1 were carried out,the following results were obiained: (1) In F2 generation, grain quality characters including GPC,WPC, DPC and S. D. S SV were significantly or highly significantly correlated with that of their high-value parent, low-value parent and mid-parent. The grain quallty characters of backcross F1 were positively correlated with that of the recurrent parent, while correlation coefficients between the quality characters and that of the third parent were positively higher in F1 generation of the three-way cross. These indicated that if we expect more high quality plants in offspring, the quality characters of parents should be better, especially for the third parent in three - way cross. (2 ) The distribution of grain quality characters tended to the recurrent parent in back cross population, and tended to the third parent in three-way cross population.