Step 1: Definition of Autotetraploid.
An autotetraploid is an organism possessing four sets of chromosomes originating from a single species. Such organisms are typically developed to enhance biomass and forage quality.
Step 2: Details on 'Pusa Giant'.
‘Pusa Giant’ is a recognized variety of berseem (Trifolium alexandrinum), a fodder crop extensively cultivated in India. Its development as an autotetraploid aimed at improving both yield and adaptability.
Step 3: Verification of Possibilities.
- Bean: There is no autotetraploid known as Pusa Giant within this category.
- Berseem: This is accurate; ‘Pusa Giant’ is indeed an autotetraploid variety.
- Tomato: While Pusa varieties of tomato exist, none are an autotetraploid named ‘Pusa Giant’.
- Eggplant: An autotetraploid variety named Pusa Giant does not exist for eggplant.
Step 4: Final Determination.
Consequently, ‘Pusa Giant’ is identified as an autotetraploid of berseem.