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何為SD大鼠

更新時間:2013-02-20   點擊次數:2438次

SD(Sprague Dawley)遠交群大鼠

  動物來源:由美國的Sprague & Dawley農場的R.W.Dawley用雜合的雄性大鼠和Wistar雌性大鼠雜交后育成的一個白化封閉群大鼠,1950年傳入美國的癌癥研究所(CRL),1955年進行生物凈化,1964年傳入美國各地,同時傳入法國。1992年自美國NIH引入到中科院上海實驗動物中心。
  動物外部特征:白化
  近交代數: --
  遺傳基本組成:遠交群大鼠
  遺傳概貌:

  Cat
  b

  Es-4
  a:b=0.75:0.25

  Es-1
  a:b=0.29:0.71
  Hbb
  b

  Es-2
  a:d=0.64:0.36
  Trf
  s


  種群數:核心群35對,增殖群100對
  攜帶微生物情況:符合國標GB14922-94標準
  一般生物學特性:
  1) 繁殖性能:
  產仔率:92~95%
  平均窩產仔數:9.96~12.07只
  胎間隔:28~52天
  離乳存活率:95~98%
  2) 生長性能:
  附生長曲線圖
  3) 解剖學特性:
  附臟器重量及臟器重量系數表
  4) 臨床血液生理生化指標
  附血液生理學指標:
  附血液生化指標:
  特殊性能:
  生長快,繁育性能好,大多用于安全性試驗及營養與生長發育有關的研究。該品系對性激素敏感,對呼吸道疾病有較強的抵抗力。