Abstract
This study, conducted in Nineveh province, Iraq, investigated the inheritance of growth and yield traits in six broad bean genotypes (BASIC, MONARCH, AQUADLGE, HISTAL, CLARO DE LUNA, and LUZ DE OTONO) under three plant densities (66,666, 53,333, and 44,444 plants.ha-1) during the 2024-2025 autumn growing season. The experiment was conducted in a field in the Al-Kuwayr area of Mosul as a factorial experiment with eighteen treatments, following a completely traits except for the number of pods and the percentage of protein in the seeds, where the randomized block design with three replications. The results of the analysis of variance (ANOVA) indicate significant differences among the six genotypes for all the studied differences did not reach significance. The MONARCH genotype gave the highest average dry seed yield, significantly higher than the CLARO DE LUNA and LUZ DE OTONO genotypes. Plants at a density of 66,666 plants.ha-1 also recorded the highest average dry seed yield, significantly higher than those at a density of 44,444 plants.ha-1. The highest average dry seed yield was observed in plants with the HISTAL genotype grown at a density of 66,666 plants.ha-1, significantly excelled other interaction treatments. Genotypic variance values were significant (≥0) for all studied traits except for the number of pods and the percentage of protein in the seeds. Environmental variance values were also significant (≥0) for all studied traits. The Heritability Broad Sense values were high for plant height and flowering time. This high heritability indicates that an individual's appearance is strongly influenced by its genotype, suggesting the potential for direct improvements to these traits in subsequent seasons. The expected genotype improvement values, expressed as a percentage of the average trait, were low for flowering time, maturity, number of pods, and percentage of protein in the seeds, and moderate for the remaining traits.