Abstract: The segregation analysis method of identifying mixed major genes and polygenes by using a doubled haploid (DH) population derived from F1 microspore culture of a cross between 624 and 24-5 was conducted to study the inheritance of 8 agronomy traits in cabbage. Except the plant spreading showed model of polygenes, the other of the inheritances of the 7 traits showed the models of two major genes plus polygenes. The largest petiole length had the highest heritability of major genes of 90.44%,the heritability of the largest leave width was 67.22%,basic stem length and core length had a lower heritability of major genes of 58.62% and 56%, head height had the lowest heritability of major genes of 20.30%,the next are the largest leave length and plant height of 23.32% and 31.74%.Head height had the highest heritability of polygenes of 49.80%.The influence of environment in trait of the plant spreading is best, the environmental variance is 81.35% of phenotypic variance. The influence of environment in trait of the petiole length is lest, the environmental variance is 9.56% of phenotypic variance.

Key words: Brassica oleracea var. capitata, DH population, agronomy trait, mixed major gene and polygene genetic model, inheritance analysis