Which is a similar term to $Hybrid$ $vigour$?

Bombay green banana cultivation is the result of

What are hybrid plants generally like?

Arrange the following steps in the correct sequence for breeding a genetically diverse crop variety:
$I -$ Cross-hybridization among the selected parents
$II -$ Testing, release, and commercialization of new cultivars
$III -$ Selection and testing of superior recombinants
$IV -$ Collection of variability
$V -$ Evaluation and selection of parents

In wheat,solid stems lead to non-preference by

Which one of the following agents is used to induce mutation in higher plants?