بررسي تركيب پذيري و واريانس ژنتيكي در تلاقي تستر x لاين جهت تعيين منابع مقاومت به پوسيدگي فوزاريومي بلال ذرت

Evaluation of combing ability and genetic variance of maize Line x Tester crosses for determination of resistant sources to Fusarium ear rot

21 crosses of 3 tester lines and 7 inbred lines of maize were inoculated with Fusarium moniliforme in 1999. Crosses were planted using randomized compelete block design in four replications and their reaction to Fusarium ear rot were evaluated. According to the analysis of variance, effects of crosses and interaction of Line x Tester were significant at probability level of 1%. The lines K3640/2 and B73, showed a negative and K364011, K3547/1 and K3495/2 showed a positive general combining ability. Also, testers K18 and M017 showed a positive and a negative general combining ability, respectively. The analysis of genetic variance indicated the contribution of additive and dominance variances.