黄瓜嫩果皮颜色的遗传研究

 以2 个嫩果皮颜色不同的黄瓜自交系为试验材料，通过目测分类、色彩色差仪测定果皮色L 值和C 值，并利用P₁、P₂、F₁、B₁、B₂ 和F₂ 等6 个世代联合分析方法，研究了黄瓜嫩果皮颜色的遗传规 律。结果表明：黄瓜嫩果皮颜色性状符合两对加性-显性-上位性主基因 + 加性-显性-上位性多基 因模型（E-0 模型）；L 值和C 值F2 代主基因遗传力分别为93.61%和80.86%，遗传力较高；多基因遗传 力和环境效应都较低，在育种时对黄瓜嫩果皮颜色的选择应在早期分离世代进行。

Genetic Study on Immature Fruit Color of Cucumber

Hybrid combinations of cucumber（Cucumis sativus L.）were made with two inbred lines with different immature fruit skin color. The C and L values of immature fruit skin color were measured by color difference meter after visually classified. The generations of F₁，F₂，backcrosses B₁ and B₂ and their parents P₁ and P₂ were used to explore the inheritance of immature fruit skin color traits with the method of conjoint analysis. The results showed that the major gene and polygene（E-0 model）inheritance of immature fruit skin color in cucumber accorded with the additive-dominance-epitasis pattern. The L value and C value of major gene heritability in F2 are 93.61% and 80.86% respectively. The major gene heritability in F2 is higher while the polygene heritability and environmental effect are lower，so we suggest that the fruit skin color breeding of cucumber should be selected in the early generation.