作物学报2011，Vol.37Issue(9)：1585-1591,7.DOI:10.3724/SP.J.1006.2011.01585
玉米籽粒赖氨酸含量的遗传及其与产量的关系分析
Inheritance Analysis of Lysine Content in Maize Kernel and Its Relationship with Grain Yield
摘要
Abstract
Fifteen inbred lines selected from five basic populations of maize (Zea mays L.) were crossed with five elite inbred lines derived from different heterotic groups according to NCII design, and the 75 combinations were evaluated in two environments in 2009. The lysine contents in kernels of parents as well as their hybrids F1 and F2 populations was analyzed using the Near Infrared Reflectance Spectroscopy (MRS) method. Statistical analysis of lysine contents was conducted based on the model of triploid seed endosperm, cytoplasm and maternal effect. The results showed that lysine content in kernels was controlled not only by three sets of genetic system, namely seeds, maternal effects and cytoplasm effects, but also affected by environmental factors. The genetic variance of VG (VG=VA+VD+Vc+Vam+VDm) accounted for 76.3% of total genetic variance (Vg+Vge), of the total genetic variance VG. Variances of seed effect (VA+VD), cytoplasm effect (VC), and maternal effect (Vam+VDm) accounted for 24.6%, 19.7%, and 55.7%, respectively. The maternal heritability (h2m=40.98%) of lysine content was the highest, followed by seed heritability (A2o=17.86%), and the cytoplasm heritability (A2c=14.29%) was relatively lower. No significant correlation was found between the lysine contents in kernel and kernel yield (r = -0.0269). Therefore, much attention should be paid to selecting high-value parental lines, especially female lines, in lysine content and to making diversified crosses among lines from different maize heterotic groups in high-lysine breeding. Based on the results from this study, it seems to be possible to improve lysine content and kernel yield simultaneously from breeding materials with extensive variances.关键词
玉米/赖氨酸/遗传效应/环境Key words
Maize/ Lysine/ Inheritance effect/ Environment引用本文复制引用
汤继华,季洪强,刘义宝,张君,谭晓军,胡彦民,刘宗华..玉米籽粒赖氨酸含量的遗传及其与产量的关系分析[J].作物学报,2011,37(9):1585-1591,7.基金项目
本研究由国家自然科学基金项目(30871537),国家高技术研究发展计划(863计划)项目(2009AA10AA03)和河南省重大公益项目资助. （30871537）
