Estimation of Genetic Variability, Heritability and Genetic Advance in Grain Sorghum Population

Ali, H.I. and Mahmoud, K.M. and Amir, A.A. (2012) Estimation of Genetic Variability, Heritability and Genetic Advance in Grain Sorghum Population. American-Eurasian Journal of Agricultural & Environmental Sciences, 12 (4). pp. 414-422.

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The present study was carried out at Shandaweel Agricultural Research Station, Sohag, Egypt during 2009, 2010 and 2011 summer seasons to evaluate grain yield/plant of sorghum population and select the elite pure lines for using as parents for production of commercial hybrids. The breeding materials used in this study were F5, F6 and F7 generations of grain sorghum (Sorghum bicolor (L. ) Moench) traced back to a single cross between (R Line-92003 x ICSV-273). After two cycles of pedigree selection, the F7 generation showed 15.98%, 18.12% and 24.66% increasing in grain yield/plant over bulk sample, better parent and the check cultivar, respectively. The selection for grain yield/ plant was accompanied by decreasing in days to flowering by-6. 81%, -7.21% and -2.91%. The observed gain reached to 10.33% and 1.11% the bulk sample and check cultivar for 1000-grain weight. This increasing was also accompanied by increasing in panicle length and width. Sufficient genotypic coefficient of variability for grain yield / plant and other studied traits was observed. Phenotypic and genotypic variances are expressed as PCV% and GCV% were slightly decreased after the second cycle of selection for 1000-grain weight and days to flowering compared to the first cycle. Family No. 9 could be considered the best selected family since it showed 48.06 % increase in yield over the bulk sample and was earlier than the bulk sample by -7.70%. These results indicated that the direct selection for grain yield/plant was effective in improving the sorghum population

Item Type: Article
Author Affiliation: Field Crops Research Institute, Agricultural Research Center, Giza, Egypt
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 19 May 2012 05:45
Last Modified: 19 May 2012 05:45
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