Selection is a method related to which of the following?

In plant breeding programmes,the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called:

Discuss the two main limitations of plant hybridization programme.

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

Examples of high-yielding and disease-resistant wheat varieties were introduced in India in:

Crop rotation is carried out for