【摘要】 本试验利用来自国际玉米小麦改良中心 (GIMMYT)的UAEM黄双抗旱群体为材料 ,在自然降水条件下 ,利用NCI设计 (NorthCarolinaDesignI)对其群体的 14个与产量和抗旱性有关性状的遗传参数进行研究。结果表明 ,散粉至抽丝间隔 (ASI)、散粉期、抽丝期、穗位高、叶数、穗粗、穗行数和行粒数的加性遗传方差表现为显著或极显著 ,广义遗传力 (h2B)的变异范围在 4 5 98%～ 98 72 %之间。　　其余性状的加性遗传方差虽然不显著 ,但它们的区组×母本的互作方差都达显著或极显著水平 ,表明这些性状受环境的制约较大。另外可以看到 ,一些在育种中经常采用的、具较高遗传力的性状 ,如株高、穗长等的加性遗传方差都未达显著水平 ,表明本群体在水分胁迫环境条件下 ,不能仅依赖这些性状来作为选育指标 ,尤其对选育抗旱品种更是如此更多还原

【Abstract】 This experiment was conducted in Guangxi Agricultural University′s farm,using UAEM-a drought resistant maize population introduced from the Intermational Maize and Wheat Improvement Center(CIMMYT). The NCI experimental design was used to estimate the genetic parameters of 14 characters related to grain yield and drought resistance of maize.The results of the study show that the additive variance of anthesis-silking interval(ASI),days to anthesis,days to silking,ear height,leaf number,ear diameter,kernel rows and kernel number per row,reached a significant or highly significant level.Those characters′broad sense heritability ranges from 45.98 to 98.72%. Although other characters′additive variance did not reach the significant level,nevertheless the effect of interaction between replicates and females reached a significant or highly significant level,showing that those characters′heritability is easily influenced by environmental conditions. Furthermore,it was noted that the additive variance of some commonly used and having high hertability characters such as plant height,ear length,etc.did not reach the significant level This means that in a water stressed environment breeder cannot rely on the above named characters as the criteria for selection only,especially when dealing with the breeding of drought resistant varieties.更多还原