line breeding


noun Genetics.
a form of inbreeding directed toward keeping the offspring closely related to a superior ancestor.

1875–80, Americanism; line1 + breeding Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
line breeding
selective inbreeding that produces individuals possessing one or more of the favourable characteristics of their common ancestor

Collins English Dictionary - Complete & Unabridged 10th Edition
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