Which of the following is true for synthetics?
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- Heterogeneous populations.
- Genetic constitution changes with generations.
- Exploit GCA (not SCA).
- Used in cross-pollinated crops.
- Can be produced only in cross-pollinated crop species
- Exploits both GCA and SCA components
- Are highly homogeneous
- Genetic constitution changes over generations
The Correct Option is D
Solution and Explanation
This question tests knowledge of synthetics in plant breeding.
Step 2: Detailed Explanation:
Synthetics are populations developed by intercrossing several inbred lines.
Characteristics of synthetics:
- Genetic constitution changes over generations (D): Due to segregation and recombination.
- Can be produced in both self- and cross-pollinated crops (A): Not limited to cross-pollinated.
- Exploits GCA (General Combining Ability) only (B): Not SCA (Specific Combining Ability).
- Are not highly homogeneous (C): Synthetics are heterogeneous populations.
Thus, the correct statement is that genetic constitution changes over generations.
Step 3: Final Answer:
Thus, the true statement for synthetics is that their genetic constitution changes over generations, which corresponds to option (D).
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