›› 2012, Vol. 39 ›› Issue (11): 157-160.

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Effect of Different Freezing Frequency and Thawing Temperature on Cryopreservation of Boar Semen

LIANG Hong-bin1, YAO Xue-jun4, LI Wei-hua1, SHAO Hui1, ZHU Jin-qing3, WU Chun-hong1, NI He-min2, LIU Yun-hai2, GUO Yong2   

  1. 1. Beijing Dairy Cattle Center,Beijing 100192,China;
    2. College of Animal Science and Technology, Beijing University of Agriculture,Beijing 102206,China;
    3. Beijing City of Changping Pig Breeding Farm,Beijing 102212,China;
    4. Beijing City Changping District Animal Disease Prevention and Control Center,Beijing 102200,China
  • Received:2012-05-04 Online:2012-11-20 Published:2012-11-22

Abstract: For improving the freezing and de-freezing methods for boar semen further, it was aimed to investigate the effect of different freezing frequency(-100 ℃ 10 min,-120 ℃ 10 min,-140 ℃ 10 min) and thawing temperature(37 ℃ 30 s,45 ℃ 30 s,52 ℃ 30 s,60 ℃ 30 s) on cryopreservation of boar semen. The results showed that the sperm motility, plasma integrity, normal acrosome rate by freezing treatment with -120 ℃ 10 min, were all significantly higher than those of the other three groups respectively(P<0.05). The sperm motility, plasma integrity, normal acrosome rate by thawing treatment with 37 ℃ 30 s, were not significantly higher than those of the other three groups respectively(P>0.05), but the difference of the sperm abnormality in the treatment with 60 ℃ 30 s was significant(P<0.05), but with 45 ℃ 30 s and 52 ℃ 30 s were not significant(P>0.05). Therefore, it could be concluded that the combination of freezing by -120 ℃ 10 min and thawing by 37 ℃ 30 s were appropriate to frozen-thawed 0.25 mL pipettes of boar semen.

Key words: boar; cryopreservation; dtraw; freezing frequency; artificial insemination

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