西南春玉米MCO-3群体主要农艺性状遗传增益分析  

Genetic Gain Analysis of Main Agronomic Characters of Southwest Spring Maize MCO-3 Population

作　　者：邱贵兰 李燕 李红梅 何立群 胡美琳 赵后娟 杜林 李晓叶 吴元奇[2] 马孝玲[1] 唐海涛[1] QIU Gui-lan;LI Yan;LI Hong-mei;HE Li-qun;HU Mei-lin;ZHAO Hou-juan;DU Lin;LI Xiao-ye;WU Yuan-qi;MA Xiao-ling;TANG Hai-tao(Crop Research Institute,Sichuan Academy of Agricultural Sciences,Chengdu 610066;Maize Research Institute,Sichuan Agricultural University,Chengdu 610066;Jinghong Seed Management Station,Jinghong 666100;Institute of Agricultural Science,Xishuangbanna Dai Autonomous Prefecture,Jinghong 666100;Agricultural Products Quality and Safety Inspection Center,Xishuangbanna Prefecture,Jinghong 666100,China)

机构地区：[1]四川省农业科学院作物研究所,成都610066 [2]四川农业大学玉米研究所,成都610066 [3]景洪市种子管理站,云南景洪666100 [4]西双版纳傣族自治州农业科学研究所,云南景洪666100 [5]西双版纳州农产品质量安全检测中心,云南景洪666100

出　　处：《玉米科学》2023年第2期9-15,共7页Journal of Maize Sciences

基　　金：四川省重点研发项目“突破性玉米及高粱育种材料和方法创新及新品种选育-育种攻关项目”(2021YFYZ0017);四川省农业科学院种源卡脖子“1+3”关键技术攻关项目-环境友好型绿色玉米新品种培育及产业化;现代农业产业技术体系四川玉米创新团队“适宜夏播机械化生产玉米杂交种选育”;粮油作物绿色种质创新与遗传改良四川省重点实验室项目。

摘　　要：以西南生态区9个骨干自交系为材料,建立西南春玉米基础群体MCO-0,用测交法和后代鉴定法对其进行改良,对其不同世代的群体产量及产量性状、穗部性状、株型性状增益分析。结果表明,以MCO-0为基础群体,经过两轮的改良,MCO-2群体主要目标性状单株产量、穗行数等均有所增益,穗长、轴粗等为负增益。MCO-2经过一轮改良后的MCO-3群体株高、穗位高等有所增益,穗长、穗粗等为负增益。以MCO-1相比,MCO-3主要目标性状单株产量、秃尖长、ASI均有所增益,其余性状有的轮次有所增益,有的轮次为负增益。The nine inbred lines were used as materials to establish the basic population MCO-0 of southwest spring maize,which was improved by cross test and progeny identification.The population yield and yield traits,ear traits and plant type traits of different generations were analyzed.The results showed that MCO-0 was used as the basic population,and after a round of improvement,the main target characters of MCO-2 population including yield per plant,rows per ear,grains per row,anthesis-silking interval(ASI),etc.were all improved,while ear length,axis diameter,growth period,etc.were negative gains.After a round of improvement of MCO-2,the plant height,ear height,ASI,etc.were increased,while the ear length,ear diameter,number of grains per row,etc.were negative gains.After a round of improvement of MCO-2,the plant height,ear height,ASI,etc.were increased,while the length of ear,the thickness of ear,the number of grains per row,and the number of rows per ear were decreased.Compare with MCO-1,the main target traits of MCO-3 yield per plant,bald head length and ASI were all increased,and some of the other traits were increased or decreased in some rounds.

关 键 词：玉米 群体改良 变异系数 遗传增益 

分 类 号：S513.035.1[农业科学—作物学]