Question

What role does heterosis play in crop productivity?

Answer 1

Heterosis, or hybrid vigor, is the phenomenon where the offspring produced by crossing two genetically different homozygous inbred parents shows superior qualities compared to the parents. This results in hybrids that are more vigorous, productive, taller, and sturdier.

In crop productivity, heterosis plays a vital role by increasing the yield and quality of crops. It is widely used in many crop plants, including cereals like maize, wheat, paddy, and millets; vegetables like tomato and lady’s finger; oil crops like cotton and sunflower; and sugar-yielding crops like sugarcane. Heterosis helps in improving crop varieties commercially by producing hybrids that are more robust and high-yielding than their parents, thereby enhancing overall crop production.