CAJ | 학술논문

以7个外引玉米自交系及改良系和6个国内骨干自交系按照 NCⅡ设计组配42个杂交组合，对其8个主要穗部性状进行了遗传分析。结果表明：7923、6WC、J1782的一般配合力较高，是综合性状较好的自交系。配合力与产量相关分析结果表明：一般配合力比特殊配合力相关明显，在玉米育种实践中应重视对性状一般配合力的选择。特殊配合力和杂种优势分析结果表明：7923×8F349，7923×丹340等9个组合为高产杂交组合。遗传力分析结果表明：穗长、穗粗和穗行数的广义遗传力和狭义遗传力均较大，可早代选择；子粒长、秃尖长、出子率、百粒重的狭义遗传力相对较低，不应早代选择。
이7개외인옥미자교계급개량계화6개국내골간자교계안조 NCⅡ설계조배42개잡교조합，대기8개주요수부성상진행료유전분석。결과표명：7923、6WC、J1782적일반배합력교고，시종합성상교호적자교계。배합력여산량상관분석결과표명：일반배합력비특수배합력상관명현，재옥미육충실천중응중시대성상일반배합력적선택。특수배합력화잡충우세분석결과표명：7923×8F349，7923×단340등9개조합위고산잡교조합。유전력분석결과표명：수장、수조화수행수적엄의유전력화협의유전력균교대，가조대선택；자립장、독첨장、출자솔、백립중적협의유전력상대교저，불응조대선택。
Seven exotic and improved maize inbred lines were crossed with six elite Chinese inbred lines and 42 combinations were produced according to NCⅡ design.Eight main ear traits were genetically ana-lyzed.The results showed that inbred lines 7923,6WC and J1782 had high combining ability,which were good lines;combining ability and yield correlation analysis showed that in maize breeding,GCA was more important than SCA;we selected 7 high-yield combinations through heterosis analysis,like 7923 × 8-F349;broad heritability and narrow heritability of ear length,ear diameter and ear row number were high,so they could be selected in early generation;narrow heritability of kernel length,length of bare tip,seed ratio and hundred-grain weight was low,and they are easy to be impacted by environment,so they should not be selected in early generation.