The technology of anthers culture in vitro is one of the best effective methods of modern biology breeding for plant haploid breeding.

通过花药离体培养技术开展植物单倍体育种工作是现代生物技术育种最有效的手段之一。

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The modified method of mixing selection comes from practice. It gangs 3 breeding methods as self-cross and plant selection and mixing save seeds together, and forms 3 paces in the course of breeding.

实践中形成的改良混合选择法是把自交、单株选择、混合留种三种常规的育种方法有机地结合起来，使之成为育种过程中的3个步骤。

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But, more significantly, the genetically modified varieties tended to do worse than those produced by traditional methods of plant breeding.

ECONOMIST: GM crop plants are less weed-like than weedy