Question

Which of the following is an example of mutation breeding?
A. Pusa Swarnim , resistant to white rust
B. _Mung bean, resistant to yellow mosaic virus
C. Pusa Sadabaha r, resistant to chili mosaic virus
D. Pusa Gaurav , resistant to aphids

Answer 1

Mutation breeding is also known as "variation breeding".
It is the process of exposing seeds to chemicals or radiation in order to generate mutants with desirable traits to be bred with other cultivars.

Complete answer: Traditional farming can only yield limited food for humans and animals as most of the crops are destroyed by disease-causing bacteria and fungi.
It does not give maximum yield so new methods are introduced through biotechnology and some conventional methods are used which are resistant to certain diseases.
Pusa Swarnim resistant to white rust, Pusa Sadabahar resistant to chili mosaic virus, and Pusa Gaurav which is resistant to aphids are done by conventional methods of hybridization and selection.
In the mung bean, resistance to yellow mosaic virus and powdery mildew were induced by mutations. Plants created using mutagenesis are sometimes called mutagenic plants or mutagenic seeds.

Additional information: Disease causing organisms are called pathogens.
The individual in which a disease is caused by a pathogen is called the host.
The development of disease in a plant depends on three factors:
(i) Host genotype
(ii) Pathogen genotype
(iii) The environment

** So, the answer is B. Mung bean, resistant to yellow mosaic virus**

Note: Rate of mutation is increased by means of certain agents called mutagens. Mutagens are of two types
(a) Chemical and
(b) Physical mutagen