玉米雄穗分枝数性状遗传、杂种优势与亲子相关分析  

Analysis of Inheritance,Heterosis and Parent-offSpring Correlation of Tassel Branch Number in Maize(Zea mays L.)

作　　者：孙振[1,2] 莫乔程[3] 程备久[3] 谢传晓[2] 林凤[1] 

机构地区：[1]沈阳农业大学生物科学技术学院,辽宁沈阳110866 [2]中国农业科学院作物科学研究所,农作物基因资源与基因改良国家重大科学工程,北京100081 [3]安徽农业大学生命科学学院,安徽合肥230036

出　　处：《作物杂志》2012年第2期31-35,共5页Crops

基　　金：国家自然科学基金面上项目(31171562)

摘　　要：以15个玉米F1代杂交种及8个亲本自交系为材料,在两种氮环境下研究了玉米雄穗分枝数的遗传力、杂种优势及亲子关系等。结果表明,玉米雄穗分枝数性状存在显著的基因型和基因型×氮水平互作差异,广义遗传力达0.52～0.86。该性状F1杂交种呈近中亲遗传和超显性遗传共存的特点,大多数组合表现出正向杂种优势。亲子相关分析表明,F1雄穗分枝数与父本、高亲值及中亲值之间相关性较高。研究结果为玉米育种关于雄穗分枝性状选择提供了一定的参考。The objective of this research is to study the heritability, heterosis and parent-offspring correlation of tassel branch number （TBN） trait in maize. To meet the ends, 15 F1 hybrids and their 8 parental inbred lines were studied under two nitrogen environments. The results showed that there were significant genetic variance and genotypic x N treatment interaction among them. Whereas,the broad-sense heritability of TBN ranged from O. 52 to 0. 86. TBN of all F1 hybrids represented both mid-parent and over dominance heredity on this trait. The positive heterosis effect on TBN were found among most of the analyzed hybrids. TBN of F1 had high correlation with TBN of male, high-parental line and mid-parent score. The results provided some useful reference for TBN in maize breeding.

关 键 词：玉米 雄穗分枝数 广义遗传力 杂种 优势 亲子相关 

分 类 号：S513[农业科学—作物学]