中文摘要：

利用牙签接种和花瓣接种法鉴定了甘蓝型油菜DH821（抗）×DHBao604（感）组合P1、P2、F1、BC1、BC2和F26个世代群体菌核病的抗性，通过主基因-多基因混合遗传模型分析表明，牙签接种3d的抗性受2对加性主基因＋加性-显性多基因控制，BC1、BC2、F2群体主基因遗传率为12．49％。28．48％，多基因遗传率为21．08％～27．87％；接种5d的抗性由2对加性-显性-上位性主基因控制，显性及显性互作效应明显，无多基因修饰，BC1、BC2和F2群体主基因遗传率为25．19％～38．69％；接种3～5d的菌丝扩展抗性由2对加性-显性-上位性主基因＋加性-显性多基因控制，主基因效应明显，多基因效应不明显，BC1、BC2、F2群体主基因遗传率为0．72％～54．06％，多基因遗传率为7．34％-46．79％。花瓣接种15d的抗性由2对加性-显性-上位性主基因＋加性-显性-上位性多基因控制，2对主基因的加性效应和显性效应为-3．6051～-3．5225，互作效应为3．5190～3．6089，主基因遗传率为0．91％～41．79％，多基因遗传率为19．32％～73．69％。

英文摘要：

Resistance to Sclerotinia sclerotiorum （Lid） de Bary in cross of DH821×DHBao604 （Brassica napus L. ） was assessed by mycelial toothpicks and petals inoculations, and the inheritance of resistance in this cross was analyzed by applying the major gene plus polygene model of quantitative traits to a joint analysis of multi-generations （P1, P2, F1, BC1, BC2 and F2 ）. The results showed that resistance measured 3 d after myeelial toothpicks inoculation was controlled by 2 pairs of major genes with additive effects plus polygene with additive-dominant effects. Hedtability values of the major genes of BC1, BC2, and F2 populations were from 12.49% to 28.48%, while these of polygene were from 21.08% to 27.87%. Resistance measured 5 d after inoculation was controlled by 2 pairs of major genes with additive-dominant-epistatic effects, among which dominant and associated epistatie effects were significant. Heritability values of the major genes of BC1, BC2, and F2 populations were from 25.19 % to 38.69 %. Resistance to expansion of mycelia during 3 - 5 d after inoculation was controlled by 2 pairs of major genes with significant additive-dominant-epistatie effects plus polygene with low additive- dominant effects. Hedtabilities of major genes and polygene in BC1 , BC2, and F2 populations were from 0.72% to 54.06% and from 7.34% to 46.79%, respectively. Resistance detected 15 d after infested petals inoculation was controlled by 2 pairs of major genes with ndditive-dominant-epistatic effects plus polygene with additive-dominant-epistatic effects. The additive and dominant effects of the major genes were from - 3.605 to - 3. 5225, and the interaction effects from 3.5190 to 3.6089. Heritability of major genes and polygene in BC1, BC2 and F2 populations were from 0.91% to 41.79% and from 19.32% to 73.69%, respectively.