| 单词 | counterselection | 
| 释义 | counterselectionnoun  coun·ter·selection   "+   : selection opposed in its effects to natural selection: such as    a    : preservation of less well-adapted individuals : dysgenic selection    b    : selection in plant or animal breeding against a quality undesirable from the point of view of the breeder though likely to be retained in a state of nature  counterselection against low milk production in cattle | 
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