杂种败育指黑腹果蝇某些株系杂交后代不育尽管它们在表型上是正常的的现象
Hybrid sterility refers to the phenomenon where the hybrid offspring of certain strains of Drosophila melanogorba are infertile, even though they are phenotypically normal
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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