南方农业学报2012，Vol.43Issue(11)：1633-1637,5.DOI:10.3969/j:issn.2095-1191.2012.11.1633
两个玉米群体的构建及其改良效果
Creation and enhancement effect of two maize populations using selfing lines
摘要
Abstract
Through creating and modifying the maize populations, the maize germplasm base was amplified in order to provide new germplasm to Guangxi corn breeding programs. [Method]According to the combining ability test, inbred lines' pedigree analysis, and relevant breeding requirements, the 37 and 26 inbred lines were used to respectively create two maize based populations GZPA and GZPB, and the simplified and modified HS reciprocal recurrent selection methods were applied on the two genetically improved populaions to analyze their agronomic traits and genetic gain. [ Result ] After improvement, the average yield increase of two hybrid populations in four experimental sites was 7.70%, in which the silking days, ASI days, ear length, ear diameter, rows per ear, kernels per row, seed setting rate, and 1000-grain weight all displayed advantageous gain to some extent. The average yield of GZPA and GZPB was 5.37 and 4.85%, respectively. The population GZPA's silking days, ASI days, and seed setting rate showed negative gain; other traits, on the other hand, exhibited positive gain, and that of the plant height, ear diameter, and rows per ear showed significant difference. The population GZPB's silking days, ASI days, ear length, ear diameter, rows per ear, and kernels per row all displayed positive gain, while all other traits displayed negative gain. The variance coefficients of the two populations before and after improvements exhibited little changes. [ Conclusion ] After the improvements were obviously observed from the two groups applied with the modified HS reciprocal recurrent selection method, the two groups still showed large genetic variations, which could be enhanced further.关键词
玉米/自交系/群体构建/改良HS相互轮回选择/增益/改良效果Key words
maize/ population creation/ modified HS reciprocal recurrent selection/ improvement effect分类
农业科技引用本文复制引用
陈坤,张述宽,杨耀迥,苏琪,刘亚利,滕辉升,侯青光,陈辉云,韦德斌..两个玉米群体的构建及其改良效果[J].南方农业学报,2012,43(11):1633-1637,5.基金项目
国家现代农业产业技术体系广西玉米创新团队建设项目(nycytxgxcxtd-07) （nycytxgxcxtd-07）
国家科技支撑计划项目(2011BAD35B01) （2011BAD35B01）
广西科技攻关与新产品试制项目(桂科攻0992016-3A) （桂科攻0992016-3A）
