不同密度条件下玉米杂种优势及配合力研究  

Heterosis and Combining Ability of Maize under Different Densities

作　　者：梁雨娟[1] 刘振库 李继竹[1] 尹日成 王远路[4] 姜龙[1] 杨伟光[1] 

机构地区：[1]吉林农业大学农学院,长春130118 [2]长春市种子管理站,长春130033 [3]延边州种子管理站,吉林延吉133001 [4]北京金色农华种业科技有限公司,北京100804

出　　处：《玉米科学》2012年第6期25-29,共5页Journal of Maize Sciences

基　　金：国家"863"项目(2011AA10A103);科技部农业科技成果转化项目(2011GB2B100006);吉林省科技发展计划项目(20116030);吉林省农委农业新品种研发项目(201001);吉林省财政厅育种项目(201003)

摘　　要：以7个Reid、Lancaster类群自交系为母本,6个旅大红骨、塘四平头和PN类群自交系为父本,按不完全双列杂交组配42个杂交组合,设3种不同密度条件下对单株产量的杂种优势和配合力进行研究。结果表明,在6.0万、7.5万、9.0万株/hm2密度条件下玉米单株产量杂种优势普遍存在,低密度下单株产量杂种优势较高,随密度增加F1杂种优势降低,耐密自交系PH6WC在高密度下F1杂种优势却较高。一般配合力结果表明,Reid系统7923和PN系统666在3种密度条件下均有较高一般配合力效应,稳产性好。PH6WC一般配合力效应随密度增加而提高,说明该自交系更适于密植环境。特殊配合力结果表明,以丹黄34作父本与PH6WC、7923所组配的杂交组合比以8F349作父本与其所组配的杂交组合更耐密植。Seven inbred lines of Reid and lancaster as female six inbred lines of Ludahongcob, Tangsipingtou and PN as male parents, forty-two combinations were produced by NC II design, heterosis and combining ability of yield per plant under three different densities were studied. The result showed that the heterosis of yield per plant were ubiquitous and high under low density, with the increasing of density, the heterosis of F~ was decreased, but the densi- ty-independent inbred line of PH6WC had high heterosis of F1 under high density in 60 000, 75 000 and 90 000 plant/ha.The result of GCA analysis showed that 7923 of Reid group and 666 of PN group both had superior GCA and stable yield under three densities, the inbred line of PH6WC was more preferably under high density environment be- cause its GCA was decreased with the increasing of density. The result of SCA analysis showed that the combinations which were produced by DanHuang34 as female and PH6WC, 7923 as male were more preferable under high density than the combinations which were produced by 8F349 as female and PH6WC, 923 as male.

关 键 词：玉米 密度 杂种优势 配合力 

分 类 号：S513.035[农业科学—作物学]