Question:
Given below are two statements related to tree improvement
Statement I: Clones established in the CSO are derived from plants propagated through vegetaive means from respective plus trees.
Statement II: Trees established in the SPA are derived from plants propagated through seeds collected from selected plus trees.
In light of the above statements, choose the correct answer from the options given below
Given below are two statements related to tree improvement
Statement I: Clones established in the CSO are derived from plants propagated through vegetaive means from respective plus trees.
Statement II: Trees established in the SPA are derived from plants propagated through seeds collected from selected plus trees.
In light of the above statements, choose the correct answer from the options given below
Statement I: Clones established in the CSO are derived from plants propagated through vegetaive means from respective plus trees.
Statement II: Trees established in the SPA are derived from plants propagated through seeds collected from selected plus trees.
In light of the above statements, choose the correct answer from the options given below
Show Hint
CSO = Clonal (Identical to parent).
SSO = Seedling Seed Orchard (Grown from seeds of plus trees).
SPA = Seed Production Area (Upgraded existing stand).
SSO = Seedling Seed Orchard (Grown from seeds of plus trees).
SPA = Seed Production Area (Upgraded existing stand).
Updated On: Aug 7, 2026
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is false but Statement II is true
- Statement I is true but Statement II is false
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
The question tests knowledge of seed orchards and seed production areas used in forest genetics.
Detailed Explanation:
• CSO (Clonal Seed Orchard): By definition, a Clonal Seed Orchard is established using vegetative propagules (grafts, cuttings, or tissue culture) taken from Plus Trees. This ensures that the genetic makeup of the orchard trees is identical to the superior parents. Statement I is True.
• SPA (Seed Production Area): An SPA is a superior stand of trees (often a plantation or natural forest) that is upgraded by removing inferior trees (roguing) and managed specifically for seed production. The best trees remaining are the Plus Trees or selected phenotypes. While the original stand comes from seeds, the management focuses on the "selected" individuals. However, looking at the technical definition in ICAR contexts, SPAs are indeed often treated as improved stands where seeds are collected from the best phenotypes.
• Note: Some definitions suggest SPAs are just upgraded stands, but in the context of propagation sources for breeding, seeds from plus trees are used to establish improved units.
Step 2: Final Answer:
Both statements regarding the establishment of CSO and SPA are factually correct.
The question tests knowledge of seed orchards and seed production areas used in forest genetics.
Detailed Explanation:
• CSO (Clonal Seed Orchard): By definition, a Clonal Seed Orchard is established using vegetative propagules (grafts, cuttings, or tissue culture) taken from Plus Trees. This ensures that the genetic makeup of the orchard trees is identical to the superior parents. Statement I is True.
• SPA (Seed Production Area): An SPA is a superior stand of trees (often a plantation or natural forest) that is upgraded by removing inferior trees (roguing) and managed specifically for seed production. The best trees remaining are the Plus Trees or selected phenotypes. While the original stand comes from seeds, the management focuses on the "selected" individuals. However, looking at the technical definition in ICAR contexts, SPAs are indeed often treated as improved stands where seeds are collected from the best phenotypes.
• Note: Some definitions suggest SPAs are just upgraded stands, but in the context of propagation sources for breeding, seeds from plus trees are used to establish improved units.
Step 2: Final Answer:
Both statements regarding the establishment of CSO and SPA are factually correct.
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