摘要： 以16个玉米自交系, 以及将其按Griffing方法4组配的120个杂交组合为供试材料, 进行玉米籽粒铁含量杂种优势、亲子相关以及籽粒铁含量与主要农艺、经济性状和品质性状的遗传相关分析。结果表明, 杂交种籽粒铁含量以超低亲杂种优势为主, 也出现中亲优势和超高亲优势为正值的一些组合。杂交种籽粒铁含量与母本、父本、高值亲本、中亲和高低值亲本之差的相关均达正向极显著水平, 与低值亲本的相关达正向显著水平。铁含量与蛋白质、轴重和单株产量的遗传相关达正向极显著水平, 与穗重的遗传相关达正向显著水平, 与淀粉和油分的遗传相关表现为微弱的负相关和正相关, 与穗位高的遗传相关达负向极显著水平。

关键词: 玉米, 铁含量, 杂种优势, 亲子相关, 遗传相关

Abstract: In present study, the heterosis, parent-offspring conelation and genotypic conelations between iron content and agronomic characters, economic characters and qualitative characters were analyzed with 120 crosses composed 16 maize inbred lines by Grfffing's diallel method IV. Heterosis over low parent of iron content of hybrid was mainly, but there were some crosses that their heterosis mid-parent and heterosis over high parent were positive value. Iron content of the hybrid was significantly and positively correlated with those of their female parents, male parents, higlagvalue of patents, mid-value of parents and difference between high parents and 1ow-parents, and was significantly positive correlated with low-value of parents. In genotypic correlation, iron content was highly signfficantly and positively correlated to protein, cob weight and yield/plant, and signfficantly and positively to ear weight, and weakly ncagative or positive to starch and oil, and highly signfficantly and negatively correlated to ear height.

Key words: Maize, Iron content, Heterosis, Paren-offspring correlation, Genotypic correlation

中图分类号: 

• S513.03