Minkema D
Tijdschr Diergeneeskd. 1982 Feb 1;107(3):73-7.
For centuries, man has been successfully engaged in influencing the characteristics of productive livestock by selective breeding. The most spectacular results are those obtained regarding those characteristics which directly determine the yields of milk, meat, eggs, wool, etc. Unduly one-sided selection may result in untoward side-effects. As regards genetic influencing of fertility, constitution and resistance, the results obtained are less significant, though there would also appear to be possibilities in these cases. Genetic influencing may produce permanent improvement in a large number of cases. Efforts are occasionally made to achieve temporary improvement by biotechnical procedures. Moreover, there is a risk in the latter case of the hereditary disposition being masked by these procedures, which is bound to interfere with the selective breeding.
几个世纪以来，人类一直通过选择性育种成功地改变家畜的生产特性。最显著的成果是在那些直接决定牛奶、肉类、蛋类、羊毛等产量的特性方面取得的。然而，过度片面的选择可能会产生不良的副作用。至于对繁殖力、体质和抵抗力的遗传影响，虽然在这些方面似乎也存在可能性，但取得的成果不太显著。在许多情况下，遗传影响可能会带来永久性的改善。人们偶尔会尝试通过生物技术手段来实现暂时的改善。此外，在后一种情况下，存在这些手段掩盖遗传倾向的风险，这必然会干扰选择性育种。
