Paper
Genetic Variance Components and Heritability of Seed Protein, Oil Contents and Related Traits in a Soybean Population
- Authors:
- Aslim Rasyada; Dotti Suryatib; Agus Nuroso
- Abstract
- High seed protein and/or oil contents are desirable characters for soybean grain in the global market when it is utilized for food application. In this study, we intent to determine genetic variance and covariance for seed protein and oil content and related traits. Six cultivars, consisting of three genotypes as male and three varieties as female, were randomly chosen from fourteen varieties and five breeding lines. The F1 seed and F2 seed obtained from the crosses made through design II of Comstock and Robinson, were planted in 2013 and 2014. Days to harvest, grain weight plant-1, 100-seed weight, grain yield m-2, seed protein and oil content were measure from each entry. Additive and dominance genetic variance and heritability were estimated. We observed significant (p ≤ 0.05) additive variance for grain weight plant-1, 100-seed weight, seed protein and oil content but not for grain yield m-1 in F1 and F2 generations. A dominance component of genetic variance was significant only for grain weight plant-1, and grain protein content. Heritability ranged from 0.27 for grain protein content to 0.77 for 100-grain weight in F1 generation and from 0.22 for grain yield to 0.56 for 100-grain weight in F2 generation. Grain yield plant-1 was positively correlated to 100-grain weight but negatively correlated to grain protein content. Seed oil content did not significantly correlated to any traits. Grain yield m-1 were positively correlated to 100-grain weight but negatively correlated to seed protein content, which leads to conclude that raising grain protein content resulted to reduce grain yield of soybean genotypes.
- Keywords
- Additive Genetic; Dominance Variance; Heritability; Protein Content; Oil Content
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