topcross

/ˈtɑpˌkrɔs/
noun
  1. In animal or plant breeding, the offspring resulting from crossing a purebred or inbred male with an unrelated female, often to improve traits.
    • The farmer used a topcross to improve the milk yield of his herd.
    • The corn variety was developed through a topcross breeding program.
    • These topcross pigs grow faster than the purebred ones.
Antonyms
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