In which step of plant breeding for genetically variable crops is germplasm collection performed?

Which of the following statements is true regarding the center of origin of plants?

Methods of breeding for acquiring disease resistance are:
$I$. Conventional breeding techniques
$II$. Mutation breeding
$III$. Radiation breeding
Choose the correct option.

Which one of the following agents is used to induce mutation in higher plants?

You are a botanist working in plant breeding. Describe the various steps that you will undertake to release a new variety.

The steps of a plant breeding program are given below. Arrange them in the correct sequence.
$(a)$ Cross-hybridization among the selected parents
$(b)$ Testing,release,and commercialization of new cultivars
$(c)$ Collection of variability
$(d)$ Selection and testing of superior recombinants
$(e)$ Evaluation and selection of parents