中文摘要：

摘要：试验以种皮颜色为褐色的白菜自交系（P1）和种皮颜色为黄色的欧洲白菜型油莱自交系（P2）杂交及获得的6个基本世代（P1、P2、F1、B1、B2、F2）为材料，采用人为目测分级法和色差计法测定种皮颜色，并应用主基因＋多基因混合模型对其进行了遗传分析。结果表明：种皮颜色主要受2对加性-显性-上位性主基因控制（E或E-1），二对主基因间加性效应、显性效应差别较大且存在明显的交互作用。各分离世代的多基因遗传率均较低（0～3．36％），除B1世代外（40．63％～55．09％），各分离世代均表现较高的主基因遗传率（95．86％-97．87％），对种皮颜色性状的改良应以主基因为主，适于早期选择。

英文摘要：

The mixed major-gene plus polygene inheritance model was used to analyze the inheritance of seed coat color in B. rapa L. ssp. pekinensis and B. rapa L. ssp. dichotoma with six generations of PI （brown） and Pz（yellow） and their, F1, BI, B2 and F2. The phenotypic score was measured by visual observation and portable colormeter CR- 400. The results show that the seed coat color traits were con- trolled mainly by two major genes with additive-dominance-epistatic effects （E or E- 1 model）. Signifi- cant difference existed between additive and dominance effects of the two major genes, and significant in- teraction inside the two major genes was also detected. The polygcne heritability is lower（O--3.36% ）, and the heritability of the two major genes is greater in all segregating populations （95.86%--97.87%） except in B1 generation （40.63%--55.09%）. This implies that in the genetic improvement of seed coat color, major gene is a main factor. It is fit for early selection.