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

In a plant breeding program,what is the entire collection of plants/seeds having all the diverse alleles for all genes in a given crop called?

Assertion $A :$ Improved varieties with genetic variations can be obtained through plant breeding.
Reason $R :$ The main objectives of plant breeding are the same as those of animal breeding.
Which option is correct for Assertion $A$ and Reason $R$?

Inbreeding depression is primarily associated with which of the following?

Explain: plant breeding.

Which of the following is one of the most important reasons why wild varieties of plants should be preserved?