利用遗传改良投资培育水牛的研究进展

I. Soliman
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摘要

乳制品是亚洲国家动物蛋白的重要来源,特别是对营养脆弱群体和素食者而言。因此,增加国内牛奶供应的方法是通过对选定的具有高预测奶差的水牛父系的精子进行遗传改良来增加水牛奶产量。以埃及人工授精中心为研究对象,利用动态数学投资模型估算遗传投资的收益率。在IRR中,除经济变量外,繁殖特性和饲料效率是最重要的变量。预测IRR的最可能值为19.71%,是可行的。在受孕服务次数、第一次产犊年龄和服务期限方面增加10%,将使内部收益率降低7.51%。饲料效率每下降10%,IRR将下降9%。如果饲料成本、精液价格和牛奶价格都下降10%,内部收益率将降低7%。在建立之前,要以中等价格进口高预测乳差的水牛种精液,需要国内遗传优势。
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An Advance Study on Dairy Buffalo Development through Investment in Genetic Improvement
Dairy products are an important source of animal protein in Asian countries, especially for nutritionally vulnerable groups and vegetarians. As a result, the approach to increasing domestic milk supply is to increase buffalo milk yield through genetic improvement from the sperm of a selected buffalo sire with a high predicted milk difference. As a case study, data was collected from Artificial Insemination Centers in Egypt to use a dynamic mathematical investment model to estimate the rate of return (IRR) on genetic investment. Aside from the economic variables, the reproductive characteristics and feed efficiency are the most important variables in IRR. The anticipated most likely amount of IRR, 19.71%, was feasible. An increase of 10% in the number of conception services, age at First Calving, and service period would reduce the IRR by 7.51 percent. The IRR would drop by 9% if feed efficiency dropped by 10%. IRR would be reduced by 7% if feed costs, semen prices, and milk prices all fell by 10%. To import buffalo sires' semen of high predicted milk difference at moderate prices till establishment, domestic genetic merit is required.
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