Target Exam

CUET

Subject

Biology

Chapter

Strategies for enhancement in Food production

Question:

Arrange the steps of traditional plant breeding in sequentially. 

(A) Evaluation of hybrids
(B) Emasculation of selected parents
(C) Screening of germplasm
(D) Hybridisation of selected parents
(E) Release of hybrid variety

 Choose the correct answer from the options given below:

Options:

(B), (A), (D), (C), (E)

(D), (B), (C), (E), (A)

(C), (B), (D), (A), (E)

(C), (D), (Β), (Ε), (Α)

Correct Answer:

(C), (B), (D), (A), (E)

Explanation:

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

(C) Screening of germplasm

(B) Emasculation of selected parents

(D) Hybridisation of selected parents

(A) Evaluation of hybrids

(E) Release of hybrid variety

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 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.