蚂蚱麦×碧玉麦杂交F_2代部分重要农艺性状的遗传分析  

Genetic Analysis on Several Important Agronomic Traits in F_2 Generation of Mazhamai×Quality

作　　者：杜希朋[1,2] 闫媛媛[1,2] 刘伟华[2] 高爱农[2] 张锦鹏[2] 李秀全[2] 杨欣明[2] 车永和[1] 郭小敏[2] 

机构地区：[1]河北科技师范学院生命科技学院,河北秦皇岛066004 [2]中国农业科学院作物科学研究所,北京100081

出　　处：《麦类作物学报》2011年第4期624-629,共6页Journal of Triticeae Crops

基　　金：国家"973"计划项目:主要粮食作物骨干亲本遗传效应和利用的基础研究(2011CB100100)

摘　　要：蚂蚱麦是小麦骨干亲本之一,对蚂蚱麦进行研究可为探讨小麦骨干亲本的遗传机制及对小麦杂交育种亲本的选配和提高育种效率提供帮助。本研究利用相关分析和主基因+多基因混合遗传模型分析方法对蚂蚱麦×碧玉麦杂交F2代185个单株的株高、有效分蘖、穗长、小穗数、穗粒数和千粒重等性状进行遗传分析,结果表明这些性状是多基因控制的数量性状,其中有效分蘖受一对主基因+多基因控制,主基因遗传率为0.557,加性效应为6.916,主基因表现为负完全显性;穗长、小穗数、穗粒数和千粒重受微效多基因控制,无主效基因存在。蚂蚱麦和碧玉麦在株高、穗长、小穗数、穗粒数和千粒重方面差异显著,这表明二者是一对优异的杂交组合,有利于在后代中选择出优异的基因型。Mazhamai is one of the backbone parents in the wheat breeding.Genetic analysis of the Mazhamai is very important in studying the genetic mechanism of the backbone parents,and also in selecting parents in wheat breeding and improving breeding efficiency.Genetic analysis on plant height,number of fertile tillers,spike length,spikelets number per spike,kernels number per spike and thousand kernels weight was conducted on the 185 individuals of the F2 population derived from Mazhamai×Quality using correlation analysis and master genes ＋ multiple genes mixture genetic model analysis methods in this study.The results indicated that all traits studied were quantitative traits controlled by polygene.The number of fertile tillers was controlled by a pair of master genes and polygene with heritability value of 0.557 and additive effect of the major genes estimated as 6.916.The lord gene expression was negative completely dominant.Plant height,spike length,spikelets number per spike,kernels number per spike and thousand kernels weight were all controlled by polygene.There were significant variations in plant height,spike length,spikelets number per spike,kernels number per spike and thousand kernels weight between Mazhamai and Quality,which meant that Mazhamai×Quality was an excellent combination and excellent genotypes could be selected from their progenies.

关 键 词：小麦 骨干亲本 遗传分析 多基因控制 

分 类 号：S512.1[农业科学—作物学] S330