Genetic Variations and Gene Effect Controlling Grain Yield and Some of Its Components in Maize
Genetic Variations and Gene Effect Controlling Grain Yield and Some of Its Components in Maize作者机构：College of Agriculture Forestry Mosul University Mosul Iraq Department of Soil and Water-School of Plant Production-Faculty of Agriculture and Forestry-University of Duhok KurdistanRegion Duhok 273 Iraq
出 版 物：《Journal of Agricultural Science and Technology(B)》 (农业科学与技术（B）)
年 卷 期：2012年第2卷第7期
页 面：814-823页
主 题：Dohuk-faculty gene action combining ability single cross.
摘 要：Diallel cross analysis among seven diverse pure lines of maize, （IK8, IK58, ZP-707, OH40, UN44052, DKI7 and HS） with their nonreciprocal 21 crosses, were carried out for estimating the nature and magnitude of gene effects through component and graphic analysis for characters： number of days to tasseling, number of days to silking, plant height, ear height, number of rows per ear, number of grains per row, 300 grain weight and grain yield per plant. The results showed highly significant mean square of genotypes for all studied characters. Additive and dominance variances were found to be significant from zero for all the eight characters except number of days to tasseling and silking for which additive genetic variance was no significant. Dominance variance estimation was relatively higher than the additive variance for all characters. The graphic analysis suggested the presence of epistatic gene effects （non-allelic interaction） for number of days to tasseling, number of days to silking, plant height, number of grains per row and grain yield per plant. The estimates of narrow sense heritability varied from 1.85% for 300 grain weight to 49.88% for ear height, it was moderate in case of ear height and low for the remainder characters.
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