$A$ collection of plants and seeds having diverse alleles of all the genes of a crop is called:

Triticale,the first man-made cereal crop,was obtained by crossing wheat with which of the following?

From which species was resistance against $Phytophthora$ in potato obtained?

Consider the following four measures $(1-4)$ that could be taken to successfully grow chickpea in an area where bacterial blight disease is common.
$(1)$ Spray with Bordeaux mixture
$(2)$ Control of the insect vector of the disease pathogen
$(3)$ Use of only disease-free seeds
$(4)$ Use of varieties resistant to the disease
Which two of the above measures can control the disease?

In maize,hybrid vigour is exploited by

Resistance to $Phytophthora$ in potato is derived from which of the following species?