Close breeding and line-breeding are a part of the inbreeding system. Inbreeding refers to the cross between relatives.
Inbreeding refers to the genetic breeding system which involved the cross between relatives.
Close breeding and line-breeding are a part of the inbreeding system and these techniques involve the obtention of pure (homo-zygous) lines.
Autogamous plants show better phenotypic features when they are pure (homo-zygous) lines.
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