结果，全球的食物供应变成主要依赖于少数一些为产量最大化而设计的品种：罗得岛红鸡、大白猪、荷斯坦奶牛。
As a result, the world's food supply has become largely dependent on a shrinking list of breeds designed for maximum yield: the Rhode Island Red chicken, the large White pig, the Holstein cow.
你甚至可以去为中药产品，它可能不是一个应变对您的预算，你将获得良好的品种太多。
You can even go for herbal products, it may not be a strain on your budget and you will get good variety too.
受发病时间和发病速度的影响，不同生长阶段品种间感病程度发生相应变化。
The disease indexes of varieties were varying with growth because of the diseased time and the disease developing speed.
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