Cultivated Rice has been protected from four diseases after receiving genes from

Options

A. Oryza nivara
B. O. barthii
C. O. minuta
D. O. glaberrima.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which wild rice species has provided genes to cultivated rice to protect it from four diseases.

2. **Identifying Wild Rice Species**: The options given are:
- Oryza nivara
- Oryza barthii
- Oryza minota
- Oryza glaberrima

3. **Researching the Wild Relatives**: Wild relatives of cultivated rice are known to be sources of genetic material that can confer resistance to diseases and pests.

4. **Analyzing Each Option**:
- **Oryza nivara**: This species is not known for providing disease resistance to cultivated rice.
- **Oryza barthii**: This species also does not provide the necessary genes for disease resistance.
- **Oryza minota**: Similar to the previous options, this species does not contribute to disease resistance.
- **Oryza glaberrima**: This species, known as African rice, is one of the two domesticated rice species and is recognized for its genes that confer pest resistance.

5. **Conclusion**: Based on the analysis, the correct answer is **Oryza glaberrima** as it is known to provide genes that protect cultivated rice from diseases.

### Final Answer:
**Oryza glaberrima**

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