关键词: 甘蓝, 抽薹, 遗传分析, QTL定位

Abstract: We constructed the populations of F1，BC1，BC2，and F2 by using cabbage lines‘S-1’（early flower）and‘G-1’（late flower）as parents and adopted the plant quantitative trait major gene + polygenic mixed genetic model method to analysis the genetic model of bolting time of cabbage. Besides，we used SLAF-BSA technology to mapping the bolting time QTLs. The results showed that the bolting time fitted the model of two additive-dominant-epistatic major genes and additive-dominance polygenes. The average heritability of major genes plus polygenes was 93.41%，which indicated that bolting trait of cabbage was mainly affected by major gene inheritance. Moreover，two QTLs were detected，which located on chromosome C02 2.31–3.09 Mb and 33.57–34.40 Mb，respectively，with a total length of 1.61 Mb.

Key words: cabbage, Brassica oleracea, bolting, genetic analysis, QTL mapping