Genetic parameters and their association with yield and its components in peanut (arachis hypogaea. L) [electronic resource].

Includes references.

Three field expriments were carried out at Ismailia Agricultural Research Station, during 2003, 2004 and 2005 summer seasons to study genetic parameter i-e. phenotypic, genotypic coefficient of variability, heritability and simple correlation coefficients for some yield components for twenty genotypes of peanut. Significant differences were detected for genotypes either through three seasons and combined analysis for all characters studied, except number of branches/plant. The results showed that Introduced (1) recorded the highest pod yield/fed, seed yield/ fed and seed weigh/plant, plant height and number of pods/plant,. Introduced No.(5) gave the heighest seed yield/plant, 100-seed weight, shelling percentage, pod yield/fed, number of branches/plant, number of pods/plant and pod weigh/plant. Genotype No, (16) gave the highest values for seed weigh/plant, pod yield/plant, plant height, number of pods/plant and pod yield/plant.Also Introduced No.(19), was the highest in seed weigh/plant, 100- pod weight, 100-seed weight, shelling percentage and number of branches/plant. phenotypic, genotypic and environmental variances were observed for 100-pod weight during the three summer seasons, whereas the lowest values were estimated for number of branches/plant. Estimates of phenotypic (PCV), genotypic (GCV) and environmental (ECV) coefficients of variability for all studied characters varied from season to season and from character to another. The highest values of phenotypic, genotypic and environmental were recorded for number of pods/plant. pod yield/fed and seed yield/fed, while the lowest values were obtained for 100-seed weight and shelling percentage during the three successive seasons. High values of heritability (> 50%) were recorded for seed weigh/plant and 100-pod weight during 2004 and 2005 seasons. Whereas low to moderate values of heritability were obtained in the remaining characters. Simple correlation coefficients (r) between seed yield/fed and its components revealed positively and significantly correlation coefficient (r) between seed yield/fed and each of. number of pods/plant, 100-seed weight. shelling % and seed weigh/plant. These obtained results are of great interest for peanut breeder when planning effective and correct breeding program to improve seed yield and other important characters

Summary in Arabic.

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