Question

what are high yielding varities?How they are obtained?

Answer 1

High-yielding varieties (HYVs) of agricultural crops are usually characterized by a combination of the following traits in contrast to the conventional varieties
They are usually obtained by cross breeding two different varieties of crops to obtain the desired features

Answer 2

High Yield Variety were developed by scientists to improve food supplies and reduce Famine in developing countries. These HYV or 'miracle' seeds can produce up to ten times more crops than regular seeds on the same area of land.