种子2025，Vol.44Issue(9)：11-19,9.DOI:10.16590/j.cnki.1001-4705.2025.09.011
温热种质改良玉米自交系产量和穗部性状配合力分析
Combining Ability Analysis of Yield and Ear Characters by Maize Inbred Lines with Introgression from Temperate and Tropical Germplasm
摘要
Abstract
To explore the influence of the proportion of tropical germplasm bloodline on the compatibil-ity of temperate maize(Zea mays L.)inbred lines,the NC-Ⅱ genetic mating design was adopted.Twenty inbred lines with different proportions of tropical germplasm bloodline were selected as the test lines and four tropical maize test varieties were used to formulate 80 hybrid combinations.The compatibility of agronomic traits of each combination and the application potential and breeding value of these inbred lines were systematically evaluated.The results indicated that the improved lines YM-LT9,YMLT14,YMLT5,YMLT20 and YMLT10 demonstrated excellent overall performance in terms of yield and the combination ability of panicle traits,and had high potential for breeding utiliza-tion.The GCA effect values of each improved line on panicle length and other panicle related traits did not show a significant correlation with the GCA effect values of single-plant yield.When the propor-tion of tropical germplasm introduced was 12.500％,the yield GCA effect value of the inbred line reached the maximum positive value.However,as the proportion continued to increase to 96.875％,the yield GCA dropped to the lowest negative value.Therefore,in the process of maize breeding,the proportion of tropical germplasm introduced should be carefully considered to ensure the optimization of breeding efficiency and effect.关键词
玉米/改良系/种质/配合力Key words
Zea mays L./improved inbred lines/germplasm/combining ability分类
农业科技引用本文复制引用
罗黎明,姚文华,韩学琴,汪燕芬,黄云霄,陈洪梅,邓红山,尹兴福,毕亚琪,王晶..温热种质改良玉米自交系产量和穗部性状配合力分析[J].种子,2025,44(9):11-19,9.基金项目
"十四五"国家重点研发计划"西南及南方高产抗逆耐瘠薄宜籽粒机收玉米新种质创制与应用"(2023YFD1201104) （2023YFD1201104）
云南省科技人才与平台计划"云南种子种业联合实验室元谋研发中心共享平台建设"(202405AR340001) （202405AR340001）
