几个冬小麦品种主要农艺性状配合力与遗传力初探.pdf

In order to explore the relationship between combining ability of main agronomic traits of different varieties of winter wheat and heredity of hybrid offspring, more hybrid combinations were provided for the selection of parent wheat varieties with good traits for hybrid breeding. Under the guidance of our tutor, we selected five wheat varieties with high yield as the mother plant. The test codes of the five wheat varieties are QM1-7, QM1-9, QM2-1, QM2-3 and QM2-9, which have the characteristics of high yield, high drought resistance and compact plant type, and are the ideal varieties for the mother plant. At the same time, we selected the tobacco farmer 19, lumai 21, tobacco farmer 836, he-mai 17, Ken xing 1 as the father. Using 5 x5 incomplete diallel cross method on winter wheat varieties (lines), a total of 25 hybrid combinations, and the varieties of wheat cultivars and hybridization of plant height, stronger spikelet, ear grain number and grain, several properties such as yield measurement records, and analysis of the combining ability of every agronomic characters, each character of combining ability effect value measurement record. In the parental group, keshang 19, tobacco farmer 19, QM2-9 and QM2-1 were all ideal parental wheat varieties with relatively good data, which could be observed and cultivated with emphasis. In the hybrid combination, there were four parent combinations (QM2-1 × yanong 19) (QM2-1 × ruma21) (QM2-1 × hemai 17) (QM2-1 × kexing-1) that showed the ideal state. By exploring the combining ability of mother and father and the heredity of traits of hybrid offspring, it has an important role in breeding hybrid varieties of father and mother correctly, improving the breeding efficiency and saving the time used in breeding. Key words: winter wheat; Agronomic character; Combining ability; heritability 1 绪论：