Question:
Based on related mating concept, what should be the ideal number for selecting desired genotypes for each stand for its use in operatiol seed orchards?
Based on related mating concept, what should be the ideal number for selecting desired genotypes for each stand for its use in operatiol seed orchards?
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Selecting only one candidate tree per stand is a standard protocol in clol seed orchard establishment to avoid co-ancestry and relatedness among orchard parents.
Updated On: Jul 28, 2026
- One genotype
- At least five genotypes
- Ten genotypes
- Not $>$ 25 genotypes
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Seed orchards are established to produce genetically superior forest seeds.
To ensure high genetic gain and avoid inbreeding depression, the parental clones or seedlings must have maximum genetic diversity and minimal relatedness.
Step 2: Detailed Explation:
Forest trees growing close together in a tural forest stand are often related (e.g., half-siblings or full-siblings) because of localized seed dispersal and pollition.
Under the related mating concept, if we select multiple trees from the same stand, their offspring are highly likely to suffer from inbreeding depression due to mating among related individuals.
To avoid this risk, tree breeders follow a strict rule: select only one genotype (one plus tree) per stand.
By collecting only one clone per stand from widely separated stands, we ensure that all clones in the seed orchard are completely unrelated.
This maximizes outcrossing, minimizes selfing, and maintains high genetic diversity in the orchard's seed crops.
Step 3: Fil Answer:
The ideal number of genotypes selected per stand to avoid related mating in seed orchards is one.
Hence, the correct option is (A).
Seed orchards are established to produce genetically superior forest seeds.
To ensure high genetic gain and avoid inbreeding depression, the parental clones or seedlings must have maximum genetic diversity and minimal relatedness.
Step 2: Detailed Explation:
Forest trees growing close together in a tural forest stand are often related (e.g., half-siblings or full-siblings) because of localized seed dispersal and pollition.
Under the related mating concept, if we select multiple trees from the same stand, their offspring are highly likely to suffer from inbreeding depression due to mating among related individuals.
To avoid this risk, tree breeders follow a strict rule: select only one genotype (one plus tree) per stand.
By collecting only one clone per stand from widely separated stands, we ensure that all clones in the seed orchard are completely unrelated.
This maximizes outcrossing, minimizes selfing, and maintains high genetic diversity in the orchard's seed crops.
Step 3: Fil Answer:
The ideal number of genotypes selected per stand to avoid related mating in seed orchards is one.
Hence, the correct option is (A).
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