Effect of preservation time of straw frozen semen on application in cashmere goats
In order to compare the quality and application effect of straw frozen semen at different storage times in cashmere goats.The straw frozen semen of a Liaoning cashmere buck were preserved in 2005,and checked,and used in 2005,2010,2015 and 2023,respectively.The does used for artificial insemination were at similar weight.The vitality,deformity rate,conception rate,and the lambing rate,birth weight and weaning weight at 120 d in the offspring from the straw frozen semen were investigated in this experiment.The results showed that no significant variations were found in vitality and deformity rates for preserved semen after years of cryopreservation(P>0.05);no significant differences were found in conception rates and performance of the offspring(P>0.05);and no significant differences were found in lambing rate,average birth weight and average weaning weight at 120 d in the offspring from straw frozen semen(P>0.05).It may imply that the storage time within a certain period of straw frozen semen have no adverse effect on the quality and application of straw frozen semen in cashmere goats.
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