Inheritance of Combining Ability in Bread Wheat ( Triticum aestivum L.)

H. Abdullah, Ahmed; H. Jassam, Abdul-khader

	Inheritance of Combining Ability in Bread Wheat ( Triticum aestivum L.)
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 17, Issue 1, 2017, Pages 12-22
Authors
Ahmed H. Abdullah; Abdul-khader H. Jassam
Abstract
Six genotypes from bread wheat ( Triticum aestivum L.) were used in this study with it's half alternated crosses to estimate the combining ability of studied traits, which were ( time to spike formation , plant height , no. of spike/plant ,flag leaf area, spike length , no. of grains in the spike, weight of 1000 grains, single plant yield, biological yield, harvest index and protein ratio. All seeds of parental varieties and it's half alternated crosses were sowed in season of (2012-2013) in fields of Agriculture college/ university of Tikrit, by RCBD design with three replicates. The results which showed as: An analysis of Griffing (1956b) showed differences between mean squares of General combining ability at 1% prob. Level for all the traits, except ratios of harvest index and protein ratio. The mean squares of specific combining ability were differed at 1% prob. Level for all the traits, except plant height trait which was significant at 5% prob. Level , and was non-significant for harvest index trait. The ratio between the variance of General combining ability components was less than one for all studied characters. The best parents which were desired as a significant in General combining ability was parent (2) for duration of spike formation , plant height ,no. of spikes per plant , flag leaf area , no. of grains in the spike , grain yield in the plant , biological yield and harvest index traits. The highest hybrids which were desired as significant were in the hybrid (1×6) as a specific combining ability for all studied traits.
Keywords
Bread Wheat; Combining Ability General; Com; Abil; Specific

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