Heritability and Expected Genetic Advance of Three Broad Bean Under Effect of Some Agricultural Treatments

Abstract

The study included evaluating the performance of three different source cultivars of broad beans (Histal, Fava da orto, and Luz de otono) and estimating genetic and phenotypic variations, heritability, and expected genetic improvement of the yield and its components in one of the fields of the Department of Horticulture and Landscape Engineering - College of Agriculture and Forestry - University of Mosul during autumn season 2019. - 2020, under the influence of some cultivation treatments, which are two treatments, the first is bacillus biofertilizer at two concentrations (no spraying and 1 ml L1) and the second is spraying with boron at three concentrations (no boron and 30 and 60 mg L-1) within a completely randomized block design with three replicates. The analysis of variance revealed that the cultivars had statistically significant mean squares at the 1% probability level for various traits including plant height, biological yield, number of days for 50% of the plants to flower, average pod weight, pod length, weight of green seeds, average weight of 100 seeds, yield of green pods, and total yield of green pods. The cultivars exhibited statistical significance at the 5% probability level for both the number of branches and the percentage of pods set. Significant genetic variance values were observed for all traits, except for the number of green seeds. Similarly, significant environmental and phenotypic variance values were observed for all traits being investigated. The heritability of most traits was high, with values ranging from 0.124 for the number of green seeds to 0.992 for plant height. The anticipated genetic enhancement values, expressed as a percentage of the mean trait, were notably high for the following traits: plant height, biological yield, number of days to 50% flowering, number of flowers, average pod weight, average weight of 100 seeds, green pod yield, and overall yield. Complete set of green pods.