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Backcrossing
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===Disadvantages=== * It works poorly for [[quantitative trait]]s. * It is more restricted for [[recessive trait]]s. * In practice, sections of [[genome]] from the nonrecurrent parents are often still present and can have unwanted traits associated with them. * For very wide crosses, limited recombination may maintain thousands of "alien" genes within the elite [[cultivar]]. * Many backcrosses are required to produce a new cultivar, which can take many years.
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