The antigen of Fusarium wilt is seldom. Therefore, using conventional breeding methods to improve resistance of cucumber Fusarium wilt has limitation.

由于黄瓜本身枯萎病抗原材料较少，因此，利用常规育种手段提高黄瓜枯萎病抗病性具有一定的局限性。

youdao

It is laborious and slow to create a new cultivar with high-multi resistance and high yield and quality through conventional breeding methods from present germ-plasm.

通过常规育种手段从现有资源中选育出多抗、高抗、优质、高产品种难度大，耗时长。

youdao

"I'm trying three methods of breeding," Farrant says, "conventional, genetic modification and gene editing."

法兰特说：“我正在尝试三种育种方法，常规方法、基因修饰和基因编辑。”

youdao

They have been using conventional breeding methods to develop and test soybeans that can grow well under dry conditions.

VOA: special.2009.03.23

That history might be a little unsettling to some, but these are conventional breeding methods, not GE.

FORBES: "Genetically Engineered" In California: A Food Label We Don't Need