The physiological characteristics of wheat plants that adapt different wheat cultivars to different climates include-
• [(A).] Fertilizer requirement.
• [(B).] Vernalization requirement.
• [(C).] Winter hardiness (cold tolerance)
• [(D).] Photoperiod response. Choose the correct answer from the options given below:
The physiological characteristics of wheat plants that adapt different wheat cultivars to different climates include-
• [(A).] Fertilizer requirement.
• [(B).] Vernalization requirement.
• [(C).] Winter hardiness (cold tolerance)
• [(D).] Photoperiod response. Choose the correct answer from the options given below:
Show Hint
- (A), (B) and (C) only.
- (A), (B) and (D) only.
- (A), (C) and (D) only.
- (B), (C) and (D) only.
The Correct Option is D
Solution and Explanation
Wheat is grown across a wide range of climates worldwide.
To optimize yield and survive environmental stress, wheat cultivars rely on genetic systems that coordinate development with seasonal changes.
Step 3: Detailed Explanation:
Let us evaluate the listed traits:
- Vernalization requirement (B): This is the requirement for a period of cold temperature to trigger the transition from vegetative to reproductive growth.
Winter wheats require vernalization to prevent them from flowering before winter, whereas spring wheats do not. This is a primary climatic adaptation.
- Winter hardiness Cold tolerance (C): This is the biochemical ability of the plant to survive sub-zero temperatures during winter.
This trait allows winter wheat to survive high-latitude winters.
- Photoperiod response (D): This refers to how day length affects flowering.
Varieties adapted to short growing seasons are photoperiod-insensitive to ensure early flowering before summer heat, whereas others are photoperiod-sensitive.
- Fertilizer requirement (A): While fertilizer response is an important agronomic management factor, it is not a direct climatic adaptation mechanism.
Therefore, (B), (C), and (D) are the key physiological characteristics that adapt wheat to different climates.
Step 4: Final Answer:
The correct combination is (B), (C) and (D) only, matching Option (D).
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Top ICAR AIEEA Genetics & Plant Breeding Questions
Select the correct statements about origin of the tetraploid and hexaploid wheat:
• [A.] The tetraploid species Triticum turgidum is an allopolyploid.
• [B.] The hexaploid species Triticum aestivum is an allopolyploid.
• [C.] Triticum turgidum arose from a combination of Triticum monococcum and Triticum timopheevii genomes.
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• [(B).] Self-incompatibility
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Which of the following statements is NOT correct?
• [(A).] Seeds of synthetic varieties need to be replaced every year.
• [(B).] Hybrid crops need intensive care and more inputs.
• [(C).] Open pollinated progeny test is used in Maize and Pearl millet.
• [(D).] Composite varieties exploit both GCA and SCA. Choose the correct answer from the options given below:
Which of the following combinations of the premises of 'Gamete Selection' in plant breeding is the correct one?
• [(A).] Multiparent crosses are required for simultaneous improvements of multiple traits.
• [(B).] The male parents of the final crosses are heterozygous and hence heterogametic.
• [(C).] Each zygotic seed is a product of a separate, independent fertilization event.
• [(D).] Gametic selection is an effective method to isolate an inbred for hybrid breeding.
Choose the correct answer from the options given below:
Which of the following statements about synthetic varieties are correct?
• [(A).] Unlike hybrids, the farmers can save the seeds of synthetic varieties.
• [(B).] Synthetic varieties have wider adaptability.
• [(C).] No need to make fresh crosses every year.
• [(D).] Synthetic varieties are higher yielding than the hybrids.
Choose the correct answer from the options given below:
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