普通玉米3个子粒性状的基因效应分析  

Analysis of Gene Effect on Three Kernel Traits in Normal Maize(Zea mays L.)

作　　者：樊庆琦[1] 杨克诚[1] 乔善宝[1] 

机构地区：[1]四川农业大学玉米研究所,四川雅安625014

出　　处：《玉米科学》2006年第1期61-63,共3页Journal of Maize Sciences

基　　金：四川省玉米育种攻关项目资助

摘　　要：为了研究与产量和商品品质有关的子粒性状的遗传机制,利用子粒性状差异明显的6个自交系在加性-显性模型下对子粒长度、子粒容重、HKWI3个子粒性状进行了遗传分析。结果表明,3个子粒性状在多数组合中不符合加性-显性模型,存在上位性效应,其加性效应和显性效应均显著存在,加性效应除子粒长度在多数组合中表现为减效,其余性状为增效;3个子粒性状的显性效应均为增效,且显性效应大于加性效应;上位性效应因材料而异。根据3个子粒性状的遗传特性,通过自交系的选育对其进行选择应该是有效的,一般应在较高世代进行单株选择,同时还应重视亲本间的组配。Aiming at studying the kernel trait genetic mechanism which is related to yield and quality, using six inbred lines as research subject that are very different in kernel trait, we conducted a genetic analysis on kernel length, kernel density, and HKWI under the additive-dominance model. The results are as follows. It is found that in most groups the above three traits are not following the additlve-dominance model. In most groups, epistasis effect is found to be existing and the additive effect, and dominance effect are also widely functioning. Among addictive effect, within most groups many showed the addictive effect except for kernel length and the dominance effect is more than additive effect; epistasis effect changes according to the maize. According to genetic characteristics of the three kernel traits, it is estimated to be effective to conduct selection through inbred lines. Individual selection should be conducted in comparatively higher generation and simultaneously matching between parent generation should not be neglected.

关 键 词：玉米 子粒性状 遗传模型 基因效应 

分 类 号：S513.01[农业科学—作物学]