One of the popular methods employed in the production of new varieties of plants is

Describe various steps in breeding a new genetic variety of a crop.

The concept of 'centre of origin' was first of all given by:

Which is the oldest method of plant breeding for crop improvement?

Semi-dwarf rice varieties were developed from . . . . . . in Philippines.

Given below are the steps involved in a plant breeding program. Identify the correct sequence of these steps.
$i$. Collection of variability
$ii$. Hybridization
$iii$. Evaluation and selection of parents
$iv$. Testing,release,and commercialization of new cultivars
$v$. Selection and testing of superior recombinants