Inheritance of siliqua strength in Brassica campestris L. II. Quantitative genetic analysis

Quantitative genetic analysis of siliqua strength in Brassica campestris L. was conducted in the cross cv. Torch × DS-17-D using the North Carolina experiment II design. This revealed the presence of a high degree of nonadditive genetic variance and a high heritability (broad sense) for all measures of siliqua strength. These results are in accordance with earlier findings of the likelihood of a small number of genes controlling siliqua strength which interact epistatically.Key words: siliqua strength, shatter resistance, genetic variances (additive and nonadditive), heritability.