selective breeding

音標(biāo)發(fā)音

Thousands of years of selective breeding have produced extensive genetic changes in the plants and animals we eat, not all of them good.
數(shù)千年的選擇性培育已經(jīng)造成了食用植物和動物廣泛的基因改變，竝非所有的改變都是好的。
Many scientists agree that the domestic dog displays more morphological variation than any other known species, thanks to selective breeding by humans.
許多科學(xué)家都認(rèn)爲(wèi)，國內(nèi)的狗更顯示形態(tài)比任何其他已知的物種變異，人類有選擇育種的感謝。
Selective breeding over time created these wide variations, but the process depended on nature to produce the desired gene.
長時(shí)間選擇性的培育創(chuàng)造了這些廣泛的變種，但是這個(gè)過程還是要依賴大自然來産生出所需的基因。

BioHeap, as Titan dubs its process, uses bacteria that the company has developed by selective breeding over the past five years.
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At one time or another, indigenous people in tropical Africa and South America knew how to cultivate and prepare nutritious food by selective breeding of as many as 30, 000 species of plants.
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The last century showed us what the once popular, seemingly scientific idea of eugenics--the belief that we could improve human beings the way we improve animals and plants through selective breeding, planting and culling--led to.
FORBES: Fact and Comment

the process of choosing only plants and animals with desirable characteristics to reproduce