Bombay green banana cultivation is the result of

In maize,hybrid vigour is exploited by

The conventional method of breeding for resistance includes:
$I$. Screening the germplasm for resistant sources
$II$. Hybridization of selected parents
$III$. Selection and evaluation of the hybrids
$IV$. Testing and release of new varieties
Choose the correct option.

In mutation breeding,mutations are induced by using radiation like

Disease resistance in crops is obtained by:

$A$ scion is grafted to stock. The quality of fruits produced will be determined by the genotype of: