They are the product of generations of selective breeding and hybridisation.
它们是一代又一代选择性繁殖和杂交的产物。
We know that probably at least 10 per cent of plant species were formed by some kind of hybridisation.
我们知道，大体上至少有10%的植物品种是通过杂交而形成的。
Through selection, hybridisation and GM you can create new varieties that are dangerous and life-threatening, or you can create varieties that are better and safer to eat.
通过选择、杂交和转基因，人们既有可能创造出危险及有害的新作物，也有可能创造出更好、食用更安全的作物。
There are various methods to operate the project including ordinary ways such as selection, introduction and hybridisation, in addition to bioengineering arts such as gene engineering and mutation.
有许多不同的方法用来选育耐盐植物，包括选、引、育等常规育种方法和基因工程，突变体育种等生物工程方法。
There are various methods to operate the project including ordinary ways such as selection, introduction and hybridisation, in addition to bioengineering arts such as gene engineering and mutation.
有许多不同的方法用来选育耐盐植物，包括选、引、育等常规育种方法和基因工程，突变体育种等生物工程方法。
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