Identify the correct sequence of steps in breeding crop plants for disease resistance.

A. Testing and release of New varieties
B. Hybridization of the selected parents
C. Screening germplasm for resistance source
D. Selection and evaluation of hybrids

Choose the correct answer from the options given below:

C→B→D→A

The correct answer is Option (3) → C→B→D→A

C. Screening germplasm for resistance source

B. Hybridization of the selected parents

D. Selection and evaluation of hybrids

A. Testing and release of New varieties

A wide range of fungal, bacterial and viral pathogens, affect the yield of cultivated crop species, especially in tropical climates. Crop losses can often be significant, up to 20-30 per cent, or sometimes even total. In this situation, breeding and development of cultivars resistant to disease enhances food production.

Methods of breeding for disease resistance: Breeding is carried out by the conventional breeding techniques (described earlier) or by mutation breeding. The conventional method of breeding for disease resistance is that of hybridisation and selection. It’s steps are essentially identical to those for breeding for any other agronomic characters such as high yield. The various sequential steps are : screening germplasm for resistance sources, hybridisation of selected parents, selection and evaluation of the hybrids and testing and release of new varieties.