樱桃番茄果色的遗传分析

摘要

Various hybrids were generated by crossing among two black ,6 red ,4 pink ,2 orange ,and 2 yellow cherry tomato inbred lines . The visual fruit color classification for the tomatoes was obtained using a Royal Horticultural Society plant color chart .The phenotypic observation of 6 samples was performed on a color difference meter .And ,the major plus multi-gene analysis of quantitative traits in plant was used to study the genetic law of the fruit color in black cherry tomato .The results showed that the black fruit color was a recessive trait .The parents must be of black type in order to achieve the same fruit color in hybrid F1 .The genetic fruit color trait of the combination ,PINK × Z2 ,was determined by additive-dominant-epistemic model of two major genes ,and there was an epistemic effect between the two major genes .%以2个黑色樱桃番茄的自交系Z1、Z2，与红色、粉红色、橙色和黄色樱桃番茄自交系（分别以R、P、O和Y代表各类型）为试材，进行杂交。采取RHS植物色卡比对结合目测进行分类、色彩色差仪测定果色；并利用植物数量性状主基因＋多基因的遗传分析方法，对黑色樱桃番茄果色的遗传规律进行研究。结果表明：樱桃番茄果色黑色性状为隐性性状遗传，双亲果色必须都是黑色类型，才能获得同类型果色的杂种一代；组合PINK × Z2果色性状遗传符合2对加性-显性-上位性主基因模型，主基因的遗传力非常高，早期世代就要注意果色性状的选择；果色黑色性状是由基因 R和gf 这2对主基因控制，且它们之间存在着互作效应。