BRASSICA NAPUS L. توارث اسيداروسيك در كلزا

Inheritance of Erucic Acid in Rapeseed (Brassica napus L.)

To determine number and effects of genes that control erucic acid in rapeseed Brassica napus, two zero eruce acid cultivars were crossed with four cultivars containing various levels of erucic acid content (4.56% to 46.5%) including reciprocals. The erucic acid content of Ftʹs and their reciprocals was intermediate of parents indicating embryone control of erucic acid and absence of maternal effect in inheritance of eruce acid in B. napus. Eruce acid content of F2 seeds segregated in to 5 classes <2%, 2-16%, 16-32%, 32-44%, and >44% with a ratio of 1: 4: 6: 4: 1. Backcrosses seeds (BC]) derived from the Ft x (zero eruce acid parents), segregated into three classes (<2%, 2-16% and 16-32% erucic acid) with a ratio of 1: 2: 1. On the other hand, backcross seeds (BC2) derived from F1 x(high eruce acid parent) segregated into three classes (16-32%, 32-44% and >44% erucic acid) with a ratio of 1: 2: 1. The segregation patterns in F2 and BC1 indicated that erucic acid content in B. napus was governed by two independent genes interacting in an additive manner. Pooled data analysis also conformed above results. Contributing of alleles of genes was not same. Alleles El and E2 in this study were equal to Ea and Eb that reported already.