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永久群体的竞争优势为负向，理论上此永久F 2群体不能在生产上直接利用来作为杂交亲本，但可以作为遗传群体的研究材料。
Permanent group competitive advantage was negative, so this immortalized F2 population could not be directly used theoretically in production, but it could be used as genetic group research materials.
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