high-yield varieties 高产品种
new high-yield crop varieties 高产作物的新品种
evolving new high-yield crop varieties 研究高产作物的新品种
high-yield wheat varieties 小麦高产品种
high yield wheat varieties 高产小麦品种
Through disease resistant identification, systematic selection and cell analysis, high yield varieties and new germplasm with good agronomic characters resistant to powdery mildes have been selected.
经抗病鉴定、系统选育和细胞学分析，选育出高产、抗白粉病的小麦新品种和农艺性状较好、抗白粉病的小麦新种质。
Yet high-yield varieties are also genetically weaker crops that require expensive chemical fertilizers and toxic pesticides.
然而高产量品种也是基因较弱的作物，需要昂贵的化肥和有毒农药。
Over time farmers came to rely heavily on broadly adapted, high-yield crops to the exclusion of varieties adapted to local conditions.
久而久之，农民严重依赖普遍适应性、高产的作物，而将那些适应本地环境的品种排除在外。
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