ノブ精子が高率に占める豚精液の性状と受精能  [in Japanese] Characteristics and Fertility of Boar Semen with a High Proportion of Knobbed Sperm  [in Japanese]

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Abstract

大ヨークシャー種の雄豚の射出精液中に, アクロソーム中に小胞が形成された形態異常精子 (ノブ精子) が高率に見出された。この射出精液の一般性状, 液状保存性, 凍結保存性および受精能について検討した。<br>(1) 射出精液の運動精子率は低かったが, 精液量, 精子濃度および総精子数は正常の範囲であった。ノブ精子の割合は, ノブ精子が見出されてから屠殺されるまで常時高率で, 84.5~92.5%の範囲であった。<br>(2) 15℃の液状保存では, 運動精子率は希釈直後に著しく低下し (35.7±18.1%), 2日目で最高となり (52.1±13.8%), 5日目で再び低下 (25.0±13.8%) した。凍結・融解後の運動精子率は19.3±6.7%と, 正常精液の45.4±6.6%に比較して著しく低かった。<br>(3) 受胎試験では, 受胎例は得られなかった (0/5)。また, 授精後3~5日後に回収した卵子の全ては未受精であった (0/74)。卵子の透明帯に付着していた精子数は, 極めて少なかった。

A high incidence of morphologically abnormal spermatozoa, each with a vesicle in the acrosome, a phenomenon known as knobbed spermatozoa, was found in ejaculated semen from a Large white boar.<br>A study was conducted to examine the characteristics of this semen, including the viability of the liquid semen, the frozen-thawed semen, and its fertility.<br>(1) The semen volume, concentration and total number of spermatozoa were within the normal range, but the motility was low. The proportion of knobbed spermatozoa was constantly high (84.5-92.5%) from the time of detection of the knobbed spermatozoa until slaughter.<br>(2) The motility of the spermatozoa in the liquid semen stored at 15°C was extremely low (35.7±18.1%) on the first day of dilution, and maximal on the second day of dilution, but decreased to 25.0% on the fifth day of dilution. The motility of spermatozoa in the frozen-thawed semen was markedly lower than that of the normal semen (19.3±6.7% vs 45.4±6.6%).<br>(3) No conceptions resulted from insemination using the semen with knobbed sperm (0/5), and no fertilized ova were recovered from any of the inseminated gilts and sows (0/74). The number of spermatozoa observed on the zona pellucida was extremely low.

Journal

  • Nihon Yoton Gakkaishi

    Nihon Yoton Gakkaishi 32(3), 175-180, 1995-09-20

    The Japanese Society of Swine Science

References:  14

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008440984
  • NII NACSIS-CAT ID (NCID)
    AN10202971
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0913882X
  • Data Source
    CJP  CJPref  J-STAGE  JASI 
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