不同密度下玉米旅大红骨改良系的应用潜力  

Study on Application Potential of Improved Line of Maize Lvdahonggu in Different Densities

作　　者：吴景彬[1] 李继竹[1] 尹日成 杨伟光[1] 

机构地区：[1]吉林农业大学农学院,长春130118 [2]延边州种子管理站,延吉133001

出　　处：《吉林农业大学学报》2013年第2期154-159,共6页Journal of Jilin Agricultural University

基　　金：国家转基因生物新品种培育重大专项(2009ZX08003-024B)

摘　　要：采用NCⅡ设计,对旅大红骨改良系在不同种植密度下杂种优势表现和配合力进行了研究。结果表明:不同密度下玉米单株产量杂种优势的变化趋势因密度增加而降低,4CV、6WC与8415和4CV与8F1660的杂种优势因密度增加而降低的幅度不大或有增加趋势。3种密度下8个高杂种优势组合中,旅大红骨与Reid和Lancaster的杂种优势分别占6/8、7/8和7/8,表明Reid×旅大红骨和Lancaster×旅大红骨模式,在高产耐密杂交种选育中具有较大应用潜力。Heterosis and combining ability of Lvdabonggu inbred lines in different density conditions were studied with NC -Ⅱ mating design. The results showed yield of per plant was different in different den- sity conditions. With the increase of density, yield of per plant decreased. Heterosis of combinations of 4CV, 6WC and 8415 crossed 8F1660 increased rather than decreased. We selected 8 high heterosis com- binations in 3 density conditions. The proportion of high heterosis mode （Lvdahonggn x Reid and Lvda- honggu x Lan） was 6/8,7/8,7/8. The results showed Lan × Lvdahonggu and Reid x Lvdahonggu were good heterosis mode and had good application potential in density-resistance breeding.

关 键 词：玉米 种植密度 杂种优势 配合力 

分 类 号：S513.032[农业科学—作物学]