| Abstrakt: |
Beans are a cheap source of protein for human consumption and can be a source of income. Among abiotic factors, phosphorus (P) is an important element affecting bean productivity. The objectives of this study were (i) to hydroponically evaluate gamma ray generated bean mutants with adaptive flexibility at different concentrations of P and (ii) evaluate the effectiveness of using shoot length as an indirect selection criterion for screening genotypic variability in the response to P. The experiment was set up as 5 × 13 factorial completely randomized design (CRD) replicated 3 times, with 5 doses of P, thus, 0 mg/l, 2.35 mg/l, 4.65 mg/l, 6.97 mg/L and 9.30 mg/L in nutrient medium and thirteen genotypes (G). Genotype SK 46-17-1 was identified as a better performer across P concentration. Further exploration of G x P interaction main effects revealed that genotype SK 46-17-1 performed better than the parent in all doses of P concentration except in a medium with 9.30 mg/l. Overall, the results showed that applying a concentration of 9.30 mg/L P impedes seedling productivity. Furthermore, the phenotypic variation explained (PVE) for the association between root and shoot length was found to be 19.4%. This implies that shoot length can only be used as a supplement to root length in evaluating for genotypic efficiency at utilizing P in the hydroponic medium. [ABSTRACT FROM AUTHOR] |
