Heterosis means

What is meant by germplasm collection? What are its benefits?

What is the full form of $IRRI$?

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

Which organization is involved in the production of hybrid varieties of maize?

The germplasm collections are usually maintained at a $A$ temperature in the form of $B$. Here $A$ and $B$ refer to: