Application of Diallele Crosses
Diallele crosses are generally made in-
- Cattle
- Swine
- Poultry
- Both b & c — Correct Answer
Explanation:
Correct Answer: Both b & c (Swine and Poultry)
Diallele crosses (crossing all possible combinations of a set of lines) require high reproductive rates and short generation intervals to be practical. They are used in swine and poultry breeding but are generally impractical for cattle due to long generation intervals and low litter sizes.
Diallele Crosses — Key Facts
- Used to estimate General Combining Ability (GCA) and Specific Combining Ability (SCA).
- If n lines are crossed in all possible combinations: number of crosses = n(n−1)/2 (excluding reciprocals) or n(n−1) (including reciprocals).
- GCA is due to additive gene action; SCA is due to non-additive gene action.
- Reciprocal Recurrent Selection (RRS) is used to improve both GCA and SCA and is more suitable for poultry.
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
