Where is the International Maize and Wheat Improvement Center located?

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

Which organization is involved in the production of hybrid varieties of maize?

The plant, which is used for studying hybrid vigour or heterosis is

Examples of high-yielding and disease-resistant wheat varieties were introduced in India in:

When two genetically different individuals or lineages are crossed, the $F_1$ generation often displays superior traits compared to both parents. This phenomenon is called .....