How can crop varietes be made disease resistant to overcome food crisis in India?Explain. Name one disease resistant variety in India of:

How can crop varietes be made disease resistant to overcome food crisis in India?Explain. Name one disease resistant variety in India of:
(a)Wheat to leaf and stripe rust.
(b) Brassica to white rust.

By screening germplasm for reisistance sources, hybridization of selected parents, selection and evaluation of the hybrids and testing and release of new varieties// mutation breeding.It is possible to induce mutations artificially through use of chemicals or radiations and selecting and using the plants of desirable character as a source in breeding.//Selection amongst somaclonal variants/Genetic engineering.
(a)Himgiri.
(b)Pusa swarnim/ Karan rai.