Method for optimizing fixed timed artificial insemination effects of gilts

Abstract

The invention discloses a method for optimizing fixed timed artificial insemination effects of gilts. The gilts of the appropriate age are continuously fed with 20 mg / head / day of altrenogest for 18 d,the gilts are injected intramuscularly with 10 mL of AIS / head after feeding of altrenogest is stopped for 42 h, 200 [mu]g of GnRH / head is injected intramuscularly after 80 h, the first artificial insemination is performed after 24 h, and then the second artificial insemination is performed after 16 h. In the method, AIS is used to replace PMSG in the existing fixed timed artificial insemination procedure, the ovulation number of the gilts can be significantly increased, the ovarian cyst rate is reduced, and the hormone secretion of the gilts is improved, so that the optimization of the existing fixed timed artificial insemination technology is realized, and thereby the reproductive performance of the gilts subjected to the FTAI procedure is improved.

Description

technical field [0001] The invention relates to the technical field of livestock breeding, in particular to a method for optimizing the effect of timed insemination of gilts. Background technique [0002] As a reserve resource for a virtuous cycle in a pig farm, the quality and reproductive capacity of gilts directly affect the production level and economic benefits of the pig farm. In large-scale pig farms, the supplementary gilts are 20% to 30% of the basic sows every year. However, the rate of anestrus in gilts reaching sexual or body maturity reaches 15% to 20%. Therefore, improving the estrus and ovulation of gilts, making gilts successfully enter the production sow group, and maximizing the potential of gilts have become an urgent problem to be solved. [0003] At present, a technology that uses hormone preparations to artificially control and adjust the process of the estrous cycle of sows, so that they can concentrate on estrus, ovulation and mating within a predet...

AI Technical Summary

Problems solved by technology

However, under the current technical model, there are certain uncertainties in the optimization of reproductive indicators such as conception and farrowing performance by the timed insemination program. Further studies on the effects of exogenous hormone treatment on gilt estrus, ovulation, and embryonic development are still needed. etc. impact

[0004] In the current timed insemination procedure, Pregnant horse serum gonadotropin (PMSG) is often used as the inducer of superovulation, but because PMSG has a long half-life, it will interfere with fertilization and embryonic development after ovulation. And the repeated stimulation of PMSG has the risk of causing follicular cysts (or luteinization) and drug resistance in livestock, which will have a negative impact on the reproductive performance of sows

Images