From which species was resistance against $Phytophthora$ in potato obtained?

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 tropical variety of sugarcane is grown in South India,characterized by a thick stem and high sugar content,but does not grow well in North India?

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

The improved Indian variety of wheat,which carries genes for dwarfness and a higher percentage of protein and lysine,is:

$A$ cross involving two different genera is called