Abstract: The inheritance of late bolting in Chinese cabbage, paktroi and turnip were analyzed in this paper to enhance subsequently transferring late bolting into Chinese cabbage from paktroi or turnip. Five typical lines of Brassica campestris were used to study inheritance of late bolting. Four lines were late bolting Chinese cabbage(B. campestris L. ssp. pekinensis)YH, Paktroi(B. campestris L. ssp.chinensis) FMS and WS, turnip(B. campestris L. ssp. rapifera)MM, the other one was early bolting, Chinese cabbage BY. Four groups of six generations(P₁,P₂,F₁,F₂,B₁,B₂) of an Chinese cabbage cross YH×BY and three intraspecific crosses FMS×BY,BY×WS, MM×BY were analyzed to characterize inheritance of late bolting. The similar results indicated that the inheritance of late bolting agreed with the additive,dominant and epistatic model,and the additive component was predominant with dominant and epistatic ones, Early bolting is dominant; but the dominant component of WS was not prominent. Both broad sense heritability and narrow sense heritability were relatively high. To breed late bolting Chinese cabbages, both parent lines should be late bolting.

Key words: Chinese cabbage, Paktroi, Turnip, Bolting, Inheritance

CLC Number: 

• S634.1