Question

The technique which act as a source of recombination is

• A. Hybridisation
• B. Protoplast fusion
• C. Mutational breeding
• D. All of the above

Answer 1

The correct option is D All of the above

a) Hybridisation is defined as the process of interbreeding between two individuals of different species. This is the process in which there is breeding of plants belonging to different species. The hybrid which is formed contains the genes of both the parent species due to genetic recombination.

b) The process by which protoplasts of two different plant species fuse together to form hybrids is known as somatic hybridization and the hybrids so produced is known as somatic hybrids. The hybrids are formed due to genetic recombination in the hybrid due to the presence of contents of two different cells.

d) The process of developing new variety by changing the genome through X-ray or UV radiation is known as mutation breeding. It is a quick method to obtain genetic variation. In this process, seeds are treated with a suitable mutagen which may be chemical or radiation (gamma radiation). After the treatment with mutagens, seeds are grown in the field and self-pollinated. The obtained progeny results in a mutant line which is used as mutant variety.

Thus, the correct answer is option D.