该抗性品系对气调的抗性不太稳定，在无选择压力的情况下经室内5代饲养，抗性衰退了63.2%。
Removal of selection pressure revealed that the resistance of CA-R was unstable and RF decreased by 63.2% after 5 successive generations.
品种衰退的主要原因是抗性的丧失；
The main cause of variety decline was due to the loss of its resistance.
品种衰退的主要原因是抗性的丧失；
The main cause of variety decline was due to the loss of its resistance.
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