Genetic parameters and their associations with yield and its components in peanut (Arachis hypogaea. L)

Abstract: 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 coefficint of variability, heritability and simple correlation for some yield components for twemty genotypes of peanut.
Significant mean squares were detected for genotypes either through three seasons and combined analysis for all characters studied, except number of branches/plant. The results showed that Introduction (1) recorded the highest pod yield, seed yield/ fad and seed weight per plant, plant height, number of pods/plant and pod yield/fad. Introduction No.(5) gave the heighest seed yield/plant, 100–seed weight, shelling percentage, pod yield/fad, branches/plant, number of pods/plant and pod weight/plant.
Genotype No. (16) gave the highest values for seed weight/plant, pod yield/plant, plant height, pods/plant and pod yield/plant. Introduction No.(19), also, revealed the highest values for seed weight/plant, 100– pod weight, 100–seed weight, shelling percentage and 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 character. The highest (PCV) was recorded for No. pods/plant in summer season of 2003, seed yield/fad during 2004 and 2005 seasons. The lowest (PCV) was obtained for 100-seed weight (2003) and 100-seed weight and shelling percentage for 2nd and 3rd seasons. The hightest (GCV) was recorded for pod yield/fad (2003), pods/plant (2004) and seed weight/plant (2005). The lowest (GVC) was noticed for 100-seed weight (2003) and 100-seed weight, shelling % in 2004 and 2005 seasons.
Values of heritability varied from season to season and from character to charcter. Lower values (less than 50%) were obtained for the studied characters during 2003 season. Meanwhile, seed weight/plant recorded the highest heritability of (62.79) during 2004 season. During summer season 2005 the highest heritability was recorded for number of branches/plant (73.52), the highest phenotypic, genotypic and environmental variances were observed for 100-pod weight during the 3 summer seasons, Meanwhile, the lowest values of the three variance components were estimated for number of branches/plant.
Simple correlation coefficients (r) between seed yield and its components revealed positively and significantly correlation coefficient (r) between seed yield/fad and each of number of pods/plant, 100-seed weight, shelling % and seed weight/plant.
These results are of great interest for peanut breeder when planning effective and correct breeding program to improve seed yield and other important character.
Publication year 2006
Pages 2631-2641
Organization Name
serial title J. Agric. Sci. Mansoura univ.,
Author(s) from ARC
Publication Type Journal
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