Estimation of Genetic Parameters for yield and its components in bread wheat (Triticum aestivum L.) genotypes under pedigree selection

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Research Paper 01/02/2017
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Estimation of Genetic Parameters for yield and its components in bread wheat (Triticum aestivum L.) genotypes under pedigree selection

Abdel Aziz Nasr Sharaan, Kamal Hassan Ghallab, Mohamed Abdel Salam M. Eid
Int. J. Agron. Agri. Res.10( 2), 22-30, February 2017.
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Grain yield is a complex trait and is greatly influenced by various environmental conditions. A 3-year field investigation was carried out to estimate genetic parameters for yield and its related traits of wheat under selection in reclaimed soils conditions. Three field experiments were executed at the Experimental Farm of the Faculty of Agriculture, Fayoum University at Demo (new reclaimed sandy loam soil), Fayoum Governorate, during 2012/2013, 2013/2014, 2014/2015 growing seasons in randomized complete block design (RCBD) with three replications. Results revealed that mean square values were highly significant for all studied traits in all seasons of the experiments, indicating the presence of sufficient variability among the investigated genotypes and gave several opportunities for wheat improvement. Great correspondence was observed between genotypic coefficients of variation and phenotypic coefficients of variation in every one of the traits. The coefficients of variation were high for no. fertile tillers plant-1 (NFT), grains spike-1 (GS), grains weight spike-1 (GWS), grain yield plant-1 (GYP), spikes m-2 (NSM), grain yield (GY), and harvest index (HI). In addition to, Moderate were recorded for heading date (HD) and spike length (SL) in the all seasons, and low were obtained for days to physiological maturity (DPM) in all seasons. Heritability was greater than 80% for all studied traits whereas genetic advance as a percentage of mean (GAM %) ranged from 12.22 (SS) to 77.00 (GY) in the 1st season and from 15.42 & 12.69 (DPM) to 112.07 & 68.35 (GYP) in 2nd and 3rdseasons.


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