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ESTIMATION OF HYBRID VIGOR AND THE HYBRIDS OBTAINED FROM OF MAIZE (Zea mays L.) AS INFLUENCED BY IRRIGATION INTERVALS | ||
| Euphrates Journal of Agriculture Science | ||
| Article 1, Volume 7, Issue 1, 2015, Pages 131-142 | ||
| Abstract | ||
| Abstract: A field experiment was conducted in Agronomy Research Station Abu-Ghuraib in three seasons ( fall of 2012 and 2013) to assess the performance of six pure lines of maize (Dr-c-87 , AST-217, Dr-B-32, Zm-189, Pio-24 and MGW-12 ) and to obtain individual hybrids under 2 irrigation system ( irrigation at 5 days interval and irrigation at 13 days interval ) , as well as the estimation of hybrid vigor and its GCA and SCA with some genetic features . The pure lines mentioned above were crossed at fall of 2012 and cross hybridization processes were done in one direction . Comparisons of hybrids and their parents were conducted in fall season of 2013, following RCBD with 3 replicates . Results show the followings : Statistical genetic analysis showed that, significant differences were found among the different genotypes ( lines and their cross hybrids ) in all qualities studied . The hybrid (Pio-24×AST-217) gave in the 2nd interval treatment raw number /ear (17.40) , grain weight (252.67 gm) and plant yield (176.80 gm) . The hybrid (MGW-12×Dr-C-87) gave in the first interval highest means of grain weight (289.67 gm) and yield (246.13 gm) . Results also indicated that hybrid vigor was significant for most of the traits studied in both the seasons . This indicated the complete dominance and over dominance of genes controlling these traits . The above results indicate that the hybridization protocol is the most suitable in improving the traits . The hybrid (Pio-24×AST-217) is considered a promising hybrid for the two intervals , therefor we suggest to conduct more investigations on this hybrid in order to obtain a draught stress tolerant hybrid in many regions of the country to spread this important hybrid . | ||
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