Triticale was obtained by crossing wheat with which of the following?

Which of the following steps of plant breeding is very tedious and time-consuming?

The greatest genetic diversity of plants is found in:

What is the full form of $IRRI$?

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?

Grafting is a method that can transmit which of the following types of diseases?