Inheritance of Erucic Acid, Glucosinolate, and Oleic Acid Contents in Rapeseed (Brassica napus L.)

This study was conducted to verify the inheritance of certain characters of rapeseed including erucic acid, glucosinolate and oleic acid contents by using generation mean analysis. The cross of lines III174×Zi20 (F1), F2, BC1 (F1×P1), BC2 (F1×P2), and parents (P1 and P2) were evaluated in the field. Data were measured on individual plants for oleic acid, erucic acid, and glucosinolate contents. Transgressive variations in F2 population were observed for oleic acid content, indicating that dominance and recessive genes distributed in both parents. Scaling test indicated that the effects of genes controlling these characters did not follow the additive-dominance model. The data for three characters were analyzed using six parameter models and found that one or more types of epistatic gene effects were important for glucosinolate content. High broad sense heritabilities were obtained for erucic acid, oleic acid, and glucosinolate contents with the values of 98.97%, 93.68%, and 86.17%, respectively. Two major gene pairs were found to control the expression of erucic acid and oleic acid contents, while three major gene pairs were detected to control glucosinolate content.