一项育种计划，必须为把新的遗传种质不断地渗进育种种群提供条件，以避免近交。
A breeding programme must provide for a continual infusion of new genetic material into the population to avoid in-breeding.
一项育种计划，必须为把新的遗传种质不断地渗进育种种群提供条件，以避免近交。
A breeding programme must provide for a continual infusion of new genetic material into the population to avoid in-breeding.
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