In wheat,due to a specific type of stem,which of the following does not approach it?

The steps of a plant breeding program are given below. Arrange them in the correct sequence.
$(a)$ Cross-hybridization among the selected parents
$(b)$ Testing,release,and commercialization of new cultivars
$(c)$ Collection of variability
$(d)$ Selection and testing of superior recombinants
$(e)$ Evaluation and selection of parents

$A$ combination between an open-pollinated variety and an inbred line is called:

The full form of $IRRI$ is ...........

Hybrid vigour is mostly due to

What are hybrid plants generally like?