Question:
Given below are two statements:
Statement I: Male sterility is characterized by nonfunctional pollen grains, while female gametes function normally.
Statement II: Male sterility is found common in rose, ageratum and chrysanthemum flower crops.
In light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements:
Statement I: Male sterility is characterized by nonfunctional pollen grains, while female gametes function normally.
Statement II: Male sterility is found common in rose, ageratum and chrysanthemum flower crops.
In light of the above statements, choose the most appropriate answer from the options given below:
Statement I: Male sterility is characterized by nonfunctional pollen grains, while female gametes function normally.
Statement II: Male sterility is found common in rose, ageratum and chrysanthemum flower crops.
In light of the above statements, choose the most appropriate answer from the options given below:
Show Hint
Male sterility is primarily of three types: Genetic (GMS), Cytoplasmic (CMS), and Cytoplasmic-Genetic (CGMS). CMS is most widely used in horticulture for hybrid seed production.
Updated On: Aug 13, 2026
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Male sterility is a condition in plants where they are unable to produce functional pollen, but the ovules remain fertile. This is a crucial tool for plant breeders as it facilitates the production of hybrid seeds without the need for manual emasculation.
Step 2: Detailed Explanation:
Statement I Analysis: This is the standard biological definition of male sterility. The plant's male reproductive system is impaired (pollen may be absent, aborted, or non-viable), but the female reproductive system (stigma, style, and ovule) is fully functional and can produce seeds if fertilized by pollen from a different, compatible plant.
Statement II Analysis: Male sterility is widely documented in several ornamental crops. In Rose, it often occurs due to irregular meiosis or chromosomal imbalances. In Ageratum, cytoplasmic-genetic male sterility has been used for commercial hybrid production. In Chrysanthemum, male sterility is frequently observed, which simplifies the crossing process in this complex composite flower. These mechanisms are vital for maintaining hybrid vigor and developing new cultivars with unique floral traits. Both statements are scientifically accurate within the context of horticultural plant breeding.
Step 3: Final Answer:
Both Statement I and Statement II are correct.
Male sterility is a condition in plants where they are unable to produce functional pollen, but the ovules remain fertile. This is a crucial tool for plant breeders as it facilitates the production of hybrid seeds without the need for manual emasculation.
Step 2: Detailed Explanation:
Statement I Analysis: This is the standard biological definition of male sterility. The plant's male reproductive system is impaired (pollen may be absent, aborted, or non-viable), but the female reproductive system (stigma, style, and ovule) is fully functional and can produce seeds if fertilized by pollen from a different, compatible plant.
Statement II Analysis: Male sterility is widely documented in several ornamental crops. In Rose, it often occurs due to irregular meiosis or chromosomal imbalances. In Ageratum, cytoplasmic-genetic male sterility has been used for commercial hybrid production. In Chrysanthemum, male sterility is frequently observed, which simplifies the crossing process in this complex composite flower. These mechanisms are vital for maintaining hybrid vigor and developing new cultivars with unique floral traits. Both statements are scientifically accurate within the context of horticultural plant breeding.
Step 3: Final Answer:
Both Statement I and Statement II are correct.
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