Question
Explain concept of outbreeding and its types.
✓
Answer
(1) Outbreeding involves breeding of two unrelated animals.
(2) It is of three types, viz. outcrossing, cross-breeding and interspecific hybridization.
(3) Outcrossing:
- Outcrossing involves mating of animals of same breed, which do not have a common ancestors on either side of mating partners up to 4 to 6 generations.
- The progeny obtained from such mating is called an outcross.
- Outcrossing is done to overcome inbreeding depression.
(4) Crossbreeding:
- In crossbreeding superior males of one breed are mated with superior females of another breed.
- New animal breeds of desirable characters are developed by this method.
- Example : Hisardale breed of sheep is developed in Punjab by crossing Bikaneri ewes and Marino rams.
(5) Interspecific hybridization:
- It involves breeding of animals of two different but related species.
- It is used to produce animals with desirable characters from both the parents.
- e.g. Mule is a breed obtained from horse and donkey.
- It may not be always successful.
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