ISSN 2756-343X
Global Journal of Food and Agribusiness Management ISSN 2756-343X Vol. 2 (7), pp. 001-004, July, 2011. © International Scholars Journals
Full Length Research Paper
Genetic variation for grain yield and water absorption in common bean (Phaseolus vulgaris L.)
Alemayehu Balcha
Dilla University, School of Agricultural Sciences, P.O.Box 419, Dilla, Ethiopia,
Accepted 15 April, 2011
Abstract
Common bean (Phaseolus vulgaris L.) is commonly grown crop in Ethiopia. Increasing bean grain yield partly requires developing cultivars that are high yielding and high in water absorption. An experiment was carried out using 26 common bean genotypes grown during 2005 cropping season at Jimma, Ethiopia, to investigate genetic variances, broad-sense heritabilities and phenotypic correlation coefficients for grain yield and water absorption traits. Pods/plant, 100-seed weight (g), grain yield (g/plant) and water absorption showed high values of genetic variances. Genetic coefficients of variation ranged from 3.46(days to maturity) to 27.02 (water absorption). The broad sense heritability of grain yield, pods, seeds and water absorption were 72.36, 90.61, 58.50 and 87.09, respectively. The correlation between grain yield and pods/plant (r = 0.67; p = 0.01), and that of coat proportion and water absorption (r = 0.43; p = 0.05) were significant. This experiment suggests that selection for pods/plant could be used to improve grain yield per plant. Moreover, the presence of high broad-sense heritability values for water absorption suggests the existence of opportunity to improve this trait in common bean.
Key words: Broad-sense heritability, correlation, genetic variance, water absorption, grain yield, Phaseolus vulgaris.