不同基因型高直链淀粉玉米的遗传效应

Genetic effect of high amylose maize in different genotype

将3个ae基因供体亲本和8个普通玉米自交系进行回交转育,测定了自交系本身及其回交转育的BC1F1和BC1F2代的千粒质量和直链淀粉含量.结果表明,BC1F2与BC1F1相比,大多数组合的直链淀粉含量有一定程度的提高,但千粒质量有降低的趋势.在回交的早代材料中,千粒质量和直链淀粉含量无明显的相关性;不同的ae基因供体亲本在遗传背景不同的轮回亲本中的表达效果有很大的差别.

Three ae gene donor parents and eight maize inbred lines BC1F1 ,BC1F2 of 24 cross were used to test the kilo-grain weightiness and amylase starch content of inbred lines and BC1 F1 ,BC1F2 of different donor backcross. The results showed that amylase starch content of most cross increased in BC1 F2 ,instead, kilo-grain weightiness decreased in BC1F2. In the front material of backcross, there was no significant difference. Different donor gene ae had noticeable expression with difference recurrent parent under different genetic background. It was initial to select recurrent parent which was beneficial to express gene ae.