Mode of Gene Action of Different Traits in Maize Tester Lines

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Abstract

  Ten diallel combinations of five maize tester lines were evaluated for grain yield and some related traits using randomized complete block design with two replications in Karaj and Gorgan during year 2004. Combined analysis of variance over two locations revealed significant differences among crosses for all the traits. Diallel analysis indicated presence of additive and non-additive gene action for grain yield, plant height, ear row number, kernel width and number of kernels per ear, as well as, additive effects for tassel length and tassel main axis length above the branches, ear length, kernel number per ear row and kernel thickness. MO17 and B73 were identified as efficient testers in screening maize germplasm, and K1264/1 and KL17/2-5 as non-efficient ones.   

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