Abstract:
Oilseed rape tBrassica napus L.) is the most important oil crop. Due to a continually increasing
demand for rapeseed oil for food and non-food uses, the production of hybrid cultivars with
higher seed and oil yield has become increasingly important in recent years. However, the
systematic use of heterosis for hybrid breeding in oil seed rape is limited by relatively narrow
genetic base of adapted germplasm, which can impede the generation of distinct heterotic pools.
In the present study, experimental hybrids were developed from the crosses between tweenty
pollen lines and two eMS testers. Different types of heterosis were estimated to evaluate forty
Brassica hybrids. Mid parent heterosis (Hrn), heterosis over pollen parent (Hp) and heterosis
over standard check (He) were estimated for eleven yield and yield related characters; where
BARI Sarisha-8 was used as check variety. The average heterosis for seed yield of 40 hybrids
over mid parent was 60.26% and that of over pollen parent and standard check variety was
230.87% and 170.92% respectively. All hybrids showed higher plant height than the standard
check variety.
