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頁籤選單縮合
題名 | 荷蘭乳用公牛之後裔試驗(3):種公牛之選拔 |
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作者 | 曾青雲; 李善男; | 書刊名 | 畜產研究 |
卷期 | 27:4 1994.12[民83.12] |
頁次 | 頁303-309 |
分類號 | 437.3 |
關鍵詞 | 荷蘭種公牛; 後裔測定; Holestein bull; Progeny test; |
語文 | 中文(Chinese) |
中文摘要 | 為選拔合本省氣候環境的種公牛,利用由美國進品之優良荷蘭乳牛冷凍精液,配本省DHI牛群乳量遺傳能力最佳的母牛,所生產之小公牛育成後之公牛,製作冷凍精液,以供酪農使用,降低其生產成本並分析育成公牛之乳量遺傳能本計畫至目前為止已檢定育成之種公牛H641,H23,H26,H27,H28,H29,H35,H36以及H41等十頭之預測差異值(PDM)分別為+684,+551, +778,+918,+475,-170,+441,+661,-74以及+500公斤,乳脂之預測差異值(PDF)分別為-15,+12,+12,+19,+6,-5,+6,+14,-11以及+15公斤,其準確度分別為68,93,53,51,40,51,39,44,24以及33%,其受胎率分別為45.4,58.8,62.1,63.5,44.0,51.2,56.5,59.4,63.1以及28.8%,其中H641,H23,H26,H27等四頭已被證明是性能優良之種公牛,可供酪農使用,而H29與H36因性能不良而被淘汰。 |
英文摘要 | The young bulls from the mating of the best American sires and superior dams of DHI herds by AI were selected under local conditions for collecting semen and producing frozen semen to reduce the production cost of dairy farming in Taiwan. The genetic milking abilities of ten dairy bulls were evaluated after progeny test for purpose of breeding and improving milk production. The predicted difference for milk (PDM) for H641, H23, H26, H27, H28, H29, H33, H36, and H41 were +684, +551, 778, +918, +475, -170, +441, +661, -74 and +500 Kg respectively. The PD for fat were -15, +12, +12, +19, +6, -5, +6, +14, -11 and +15 kg, respectively. The repeatability (r) were 68, 63, 53, 51, 40, 51, 39, 44, 24 and 33%, respectively. The conception rates were 45.4, 58.8, 62.1, 63.5, 44.0, 51.2, 56.5, 59.4, 63.1 and 28.8%, respectively. In the result, four bulls (H641, H23, H26 and H27) were selected and proved to be superior and two bulls (H29 and H36) were culled due to poor performance. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。