The term hybrid vigour given by schull is technically called

Options

A. heterosis
B. autoecious
C. heteroecious
D. heterogamy

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the technical term that corresponds to "hybrid vigour," which was introduced by Schull.

2. **Identifying the Options**: The first step is to look at the possible options provided in the question. The relevant term we need to find is synonymous with hybrid vigour.

3. **Analyzing the Term "Hybrid Vigour"**: Hybrid vigour refers to the phenomenon where hybrid offspring exhibit superior qualities compared to their parent strains. This can include increased growth rates, higher yields, and better resistance to disease.

4. **Identifying the Correct Term**: Upon analysis, the term that is technically equivalent to hybrid vigour is "heterosis." Heterosis describes the improved or increased function of any biological quality in a hybrid offspring.

5. **Eliminating Incorrect Options**:
- The term "autacious" refers to plants that self-pollinate and is not related to hybrid vigour.
- The term "heterogametes" refers to gametes that are morphologically different, which is also unrelated to the concept of hybrid vigour.
- The opposite of heterosis is "inbreeding depression," which describes the reduced vitality in offspring from inbreeding.

6. **Conclusion**: Therefore, the correct answer to the question is that the term hybrid vigour, as given by Schull, is technically called "heterosis."

**Final Answer**: Heterosis

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