Analysis on Genetic Characteristics of Leaf Angle in Waxy Corn  

糯玉米叶夹角遗传特性分析（英文）

作　　者：陈趣[1] 曾慕衡[1] 蒋锋[1] 黄成威 王晓明[1] 刘鹏飞[1] 

机构地区：[1]仲恺农业工程学院农学院作物研究所,广东广州510225

出　　处：《Agricultural Science & Technology》2015年第6期1147-1150,共4页农业科学与技术（英文版）

基　　金：Supported by Special Fund for Agro-scientific Research in the Public Interest of China(201303008);Special Funds for Modern Agricultural Science and Technology Innovation,Promotion and Information Construction in Guangdong Province(YCN[2014]492);Science and Technology Plan Project of Guangdong Province(2012B020301006);Key Breeding Project for Special Maize of Department of Agriculture of Guangdong Province(B3071328)~~

摘　　要：The leaf angle in waxy corn is a significant trait for breeding corn with compact plant type, which is beneficial to improve yield. According to the Griffing method II, the GCA （general combining ability） and SCA （specific combining ability） of leaf angle trait in the 7 waxy corn inbred lines and 21 combinations were esti-mated, and the genetic characteristics of leaf angle in corn were also analyzed. The results showed that among the 7 inbred lines, the GCA values ranked as N22 〉N8 〉 N28 〉 N7 〉 N23 〉 N27 〉 N4. The GCA of N27 showed great negative ef-fect, and the genetic variance of its SCA was lower. It suggested that the N27 can be used as an ideal parent for breeding excel ent combinations with smal leaf angle and compact plant type. The inheritance of leaf angle trait in waxy corn is in ac-cordance with the model of ＂additive - dominant - epistatic＂. The efficiency of leaf angle trait is control ed by recessive genes. The broad heritability of leaf angle trait in waxy corn is relative low （68.5%）, but its narrow heritability is relatively high （72.62%）. In the breeding practices, the early-generation selection is more suitable for the leaf angel trait.按双列杂交Griffing II估算了7个糯玉米自交系及21个组合叶夹角性状的配合力,并对玉米叶夹角遗传特性进行分析。结果表明:7个自交系叶夹角性状的GCA值大小顺序为N22>N8>N28>N7>N23>N27>N4,N27的GCA值表现为较大的负效应,其特殊配合力遗传方差较小,说明N27可作为培育叶夹角较小、株型紧凑的优良组合的理想亲本。糯玉米叶夹角性状的遗传符合"加性-显性-上位性"模型,叶夹角性状的增效受隐性基因控制,叶夹角性状的广义遗传率较低,为68.50%,狭义遗传率较高,为72.62%,在育种实践中,宜早代选择。

关 键 词：Waxy corn Leaf angle Combining ability Genetic characteristics 

分 类 号：S513[农业科学—作物学]