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Semi-dwarf rice varieties were derived f...

Semi-dwarf rice varieties were derived from :-

A

IR-8 and TN-1

B

Jaya and Ratna

C

Sonalika and Kalyan sona

D

Both (1) and (2)

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Context**: The question asks about the origin of semi-dwarf rice varieties. To answer this, we need to look into the history of rice breeding and the key figures involved in the development of these varieties. 2. **Identifying Key Contributors**: The development of semi-dwarf rice varieties is closely associated with the Green Revolution, which significantly increased food production in the 20th century. Norman E. Borlaug is a critical figure in this movement, known as the "father of the Green Revolution." 3. **Researching the Varieties**: Semi-dwarf rice varieties were specifically developed from two main varieties: IR8 and Taichung Native 1 (TN1). 4. **Locating the Research Centers**: - IR8 was developed at the International Rice Research Institute (IRRI) located in the Philippines. - Taichung Native 1 was developed in Taiwan. 5. **Conclusion**: Therefore, the semi-dwarf rice varieties were derived from IR8 and Taichung Native 1. **Final Answer**: Semi-dwarf rice varieties were derived from IR8 and Taichung Native 1 (TN1). ---
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