Inbreeding of sheep can easily lead to the disadvantages of “two drops and one highâ€, that is, the production performance of sheep is degraded, the variety is degraded, growth and development are delayed, the production of flesh is reduced by about 50%, the reproduction rate is decreased, and the inbreeding causes freak and miscarriage. Chemical and stillbirths continue to emerge; sheep have poor disease resistance and high mortality. There are three main preventive measures:
First, replace the male ram of a ram in a herd for two consecutive years and then exchange it with the ram of the same breed in other sheep. Reduce the number of inbreeding mates.
Second, the species of rams are reared separately to the mating season. According to the kinship, rams with distant ancestry are selected to perform manual assisted breeding or artificial insemination. Using this method can not only avoid inbreeding, but also control the ewes lambing time and extend the useful life of rams.
3. In the townships and villages with a large number of sheep, sheep should be established Artificial insemination station Fertilization station should establish a file system, including breeding male and female sheep card, ewe breeding registration form, lamb registration form and offspring determination record form. With this archive, the kinship is clear, and it is possible to plan selection of breeding options to avoid inbreeding.
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