Question

The correct combination of somaclonal variant released as a new cultivar is -

• A. Barley - Andro
• B. Geranium - Velvet Rose
• C. Tomato - DAMA
• D. Sugarcane - Scarlet

Hint:

Remember that somaclonal variation is a source of new traits. Key examples include disease resistance in sugarcane, salt tolerance in tomato ('DAMA'), and improved tuber shape in potato.

Answer 1

The Correct Option is C

Step 1: Concept Overview:
Somaclonal variation refers to genetic differences in plants derived from tissue culture. Advantageous variations can lead to the development of new crop varieties. The question seeks an accurate example of this phenomenon.
Step 2: Detailed Analysis:
Barley - Andro: 'Andro' was likely created through androgenesis (haploid breeding from pollen culture), not somaclonal variation.
Geranium - Velvet Rose: This is a frequently cited example of a somaclonal variant originating from the Geranium cultivar 'Rober's Lemon Rose'. This is a potentially valid option.
Tomato - DAMA: 'DAMA', an Italian tomato variety, was specifically selected from somaclonal variants for its improved salt tolerance. This is a well-documented and correct example.
Sugarcane - Scarlet: 'Scarlet' is a cultivar of Pelargonium (Geranium), not sugarcane. The crop and cultivar are mismatched.
While both (B) and (C) are technically valid examples found in scientific literature, the development of a salt-tolerant tomato like 'DAMA' is a particularly strong and specific illustration of somaclonal variation's application in crop improvement, especially when considering typical textbook examples related to agricultural crops. Therefore, it is the most definitive and intended answer.
Step 3: Conclusion:
The combination Tomato - DAMA exemplifies a cultivar that was developed through the selection of somaclonal variants.