小麦蛋白质含量遗传规律及品质改良途径研究

研究了小麦籽粒蛋白质含量在F1及F2代中的表现情况。结果表明,控制蛋白质含量的基因作用以加性效应为主,同时存在非加性效应;F1代子粒蛋白质含量与双亲平均值高度相关,F2代中子粒蛋白质含量分离呈正态分布,且正态分布的峰值蛋白质含量也接近双亲平均值。蛋白质含量的一般配合力大于特殊配合力方差,在优质育种的亲本选配上,一般配合力更重要一些,应重视蛋白质高配合力亲本的鉴定应用,并计算了蛋白质含量的广义和狭义遗传力。同时对蛋白质数量改良途径进行了分析。

Study on Hereditary Regularity of Protein Content in Wheat

The expression of wheat grain protein content in F1 as well as descendant F2 were studied.The result showed that the genes that control protein content transmitted to the descendants were mainly based on additive effect,but also with the non-additive effect.The grain protein content of F1 was highly related to the average value of both parents,and the protein content in descendant F2 appeared in normal distribution.The variance of general combining ability is larger than that of special combining ability.On parents,choicing of quality breeding,general combining ability is more important than the special combining ability,and should emphasize the appraisal and use of parents with high combining ability on protein content.The heritability in broad and narrow sense were calculated. Improved mothed on protein quantity is analysesed too.