$Sonora-64$ and $Lerma$ $Rojo$ are varieties of:

Why does the sawfly not select wheat?

In mutation breeding,mutations are induced by using chemicals like

Pusa Shubhra and Pusa Snowball $K-1$ are varieties of which crop?

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

Fill in the blanks in the following statements ($A$ to $C$):
$(A)$ The capacity to generate a whole plant from any cell/explant is called ......$(i)$ .......
$(B)$ The transfer of resistance genes occurs through ........$(ii)$ ........ . Subsequently,......$(iii)$ ....... occurs between the target and the source plant.
$(C)$ The rice variety $IR8$ was developed in the country ........$(iv)$ .