In India,the earliest work in the field of plant breeding was initiated by

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

Inbreeding depression is primarily associated with which of the following?

Select the incorrect option regarding conventional plant breeding.

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