DIALLEL CROSSES FOR ESTIMATION OF COMBINING ABILITY FOR YIELD AND AGRONOMIC ATTRIBUTES IN MAIZE
Abd El-Mottalb, A. (2014). DIALLEL CROSSES FOR ESTIMATION OF COMBINING ABILITY FOR YIELD AND AGRONOMIC ATTRIBUTES IN MAIZE. EKB Journal Management System, 5(4), 615-623. doi: 10.21608/jpp.2014.53730
A. A. Abd El-Mottalb. "DIALLEL CROSSES FOR ESTIMATION OF COMBINING ABILITY FOR YIELD AND AGRONOMIC ATTRIBUTES IN MAIZE". EKB Journal Management System, 5, 4, 2014, 615-623. doi: 10.21608/jpp.2014.53730
Abd El-Mottalb, A. (2014). 'DIALLEL CROSSES FOR ESTIMATION OF COMBINING ABILITY FOR YIELD AND AGRONOMIC ATTRIBUTES IN MAIZE', EKB Journal Management System, 5(4), pp. 615-623. doi: 10.21608/jpp.2014.53730
Abd El-Mottalb, A. DIALLEL CROSSES FOR ESTIMATION OF COMBINING ABILITY FOR YIELD AND AGRONOMIC ATTRIBUTES IN MAIZE. EKB Journal Management System, 2014; 5(4): 615-623. doi: 10.21608/jpp.2014.53730

DIALLEL CROSSES FOR ESTIMATION OF COMBINING ABILITY FOR YIELD AND AGRONOMIC ATTRIBUTES IN MAIZE

Journal of Plant Production
Article 6, Volume 5, Issue 4, April 2014, Page 615-623  XML PDF (339.22 K)
Document Type: Original Article
DOI: 10.21608/jpp.2014.53730
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Author
A. A. Abd El-Mottalb*
Maize Research Department, Field Crops Research Institute,ARC, Egypt.
Abstract
The present study was carried out to estimate combining ability of 36 hybrids generated by crossing 9 new maize inbred lines in a half diallel model in 2013 season at two locations of Sids and Gemmeiza Agric. Res. Stns. The experiment was laid out in a randomized complete block design with four replications. Number of days to 50 % silking, plant height, ear height, ear length, ear diameter and grain yield (Ard / Fed) were determined. The mean squares, due to general combining ability (GCA) and specific combining ability (SCA) were highly significant for all studied traits. There was preponderance of additive gene action for all studied traits. Estimates of GCA and SCA effects showed that parental lines P6 and P8 were generally good combiners for earliness, shortness and lower ear placement, while, P2, P3 and P9 were good combiner for grain yield and can be included in future improvement maize breeding programs. Two crosses exhibited desirable SCA effects for grain yield, four hybrids significantly out yielded the highest yielding check hybrids SC. 162, and twelve hybrids did not differ significantly than the check. These hybrids may be released as commercial hybrids after further testing and evaluation. It could be concluded that P2, P3 and P9  was found to be a good GCA can be used in synthetic variety and hybrids
( P1 x P2 ) and ( P7 x P8 ) was found to be a good combiner and can use as a potential single cross hybrid  combination and tester further.    
Keywords
Maize; diallel crosses; Combining ability
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