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1.The study of heterosis intensity is crucial for understanding the genetic basis of crop improvement.
研究杂种优势强度对于理解作物改良的遗传基础至关重要。
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2. The breeder used a high-yielding variety and crossbred with a low-yielding one to enhance the heterosis intensity.
育种者使用了高产品种并与低产品种杂交，以增强杂种优势强度。
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3. Heterosis intensity is measured by comparing the yield of hybrid plants to that of their parental varieties.
杂种优势强度通过比较杂交植物的产量与其亲本品种的产量来衡量。