Maize hybrids have been developed for higher amount of.

Options

A. Methionine
B. Lysine
C. Leucine
D. Cysteine

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the specific amino acid for which maize hybrids have been developed to contain a higher amount.

2. **Identifying Nutritional Deficiencies**: It is known that normal maize lacks several essential amino acids, particularly lysine and tryptophan. This is crucial as it sets the stage for the development of hybrids.

3. **Gene Involvement**: The alteration in the protein composition of maize is controlled by a single recessive gene known as the "opaque" gene. This gene was discovered in 1964 and plays a significant role in the nutritional enhancement of maize.

4. **Focus on Lysine**: The hybrids developed are specifically aimed at increasing the lysine content in maize. Lysine is an essential amino acid that is particularly important for the diets of non-ruminant animals.

5. **Conclusion**: Based on the information gathered, the answer to the question is that maize hybrids have been developed for a higher amount of lysine.

**Final Answer**: Maize hybrids have been developed for a higher amount of lysine.

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