A man made allopolypoid cereal crop is

Options

A. Hordeum vulgare
B. Raphano brassica
C. Triticale
D. Zea mays

Explanation

### Step-by-Step Solution:

1. **Understanding Allopolyploidy**:
- Allopolyploidy refers to a type of polyploidy that involves the combination of chromosome sets from different species. This results in an organism that has more than two sets of chromosomes, derived from different species.

2. **Identifying Cereal Crops**:
- Cereal crops are plants cultivated for their edible grains. Common cereal crops include wheat (Triticum), rice (Oryza), and corn (Zea).

3. **Intergenic Hybridization**:
- Intergenic hybridization is the process of crossing two different species or genetic forms to create a hybrid. In the context of cereal crops, this involves crossing different species of cereals to produce a new crop.

4. **Specific Example of a Man-Made Allopolyploid Cereal Crop**:
- The video mentions that the man-made allopolyploid cereal crop is "triticale." Triticale is a hybrid of wheat (Triticum) and rye (Secale), which combines the desirable traits of both parent species.

5. **Conclusion**:
- Therefore, the answer to the question "A man-made allopolyploid cereal crop is" is **triticale**.

### Final Answer:
The man-made allopolyploid cereal crop is **triticale**.

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