Question:
The tedious process of emasculation in pineapple is overcome due to:
The tedious process of emasculation in pineapple is overcome due to:
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Pineapple is a self-incompatible crop. The pollen is completely functional on other varieties but is rejected by its own style/stigma, preventing self-seed set and eliminating the need for emasculation.
Updated On: Aug 7, 2026
- Incompatibility of pollen
- Incompatibility of pollen and ovule
- Incompatibility of ovule
- Incompatibility of stigma
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Emasculation is the manual removal of stamens/anthers from bisexual flowers to prevent self-pollination in plant hybridization.
In pineapple (Ananas comosus), natural biological mechanisms prevent self-fertilization, eliminating the need for this tedious manual process during breeding.
Step 2: Detailed Explanation:
Pineapple exhibits a strong mechanism of gametophytic self-incompatibility.
In this system, when pollen from a cultivar lands on the stigma of the same cultivar, the pollen tube fails to grow down the style, or its growth is extremely slow.
This prevents self-fertilization, ensuring that self-pollination does not result in seed formation (leading to the seedless fruits preferred by consumers).
In breeding programs, because the self-pollen is incompatible with its own maternal tissue (pollen-style incompatibility), breeders do not need to perform manual emasculation.
They can simply apply pollen from another compatible cultivar directly onto the stigma without worrying about selfing. This is primarily described as the incompatibility of pollen on its own style.
Step 3: Final Answer:
The self-incompatibility of pollen (pollen incompatibility) avoids selfing, making emasculation unnecessary, which corresponds to option (A).
Emasculation is the manual removal of stamens/anthers from bisexual flowers to prevent self-pollination in plant hybridization.
In pineapple (Ananas comosus), natural biological mechanisms prevent self-fertilization, eliminating the need for this tedious manual process during breeding.
Step 2: Detailed Explanation:
Pineapple exhibits a strong mechanism of gametophytic self-incompatibility.
In this system, when pollen from a cultivar lands on the stigma of the same cultivar, the pollen tube fails to grow down the style, or its growth is extremely slow.
This prevents self-fertilization, ensuring that self-pollination does not result in seed formation (leading to the seedless fruits preferred by consumers).
In breeding programs, because the self-pollen is incompatible with its own maternal tissue (pollen-style incompatibility), breeders do not need to perform manual emasculation.
They can simply apply pollen from another compatible cultivar directly onto the stigma without worrying about selfing. This is primarily described as the incompatibility of pollen on its own style.
Step 3: Final Answer:
The self-incompatibility of pollen (pollen incompatibility) avoids selfing, making emasculation unnecessary, which corresponds to option (A).
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