What are the primary aims of plant breeding?

What is the best method to increase crop yield (e.g.,$wheat$)?

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

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

Who coined the term 'heterosis'?

Modern plant breeding started in