Heterosis is also called

Options

(a) mutation
(b) hybrid vigour
(c) variation
(d) hybrid sterility

Correct Answer:

hybrid vigour

Explanation:

Hybrid vigour or heterosis is defined as the superiority of the hybrid over its parents in which expression of characteristics is greater in the heterozygous offspring than homozygous parents. It is lost on inbreeding. It is lost in the F₂ generation in self pollinated plants and declines slowly in cross pollinated plants. So it is more profitable in vegetatively propagated plants as they do not involve sexual reproduction and so hybrid vigour is not lost in subsequent crops. e.g., sweet potato, sugarcane, strawberry and grapes etc. The term was coined by G.H. Shull