Sentences with phrase «outbreeding depression»

Hybridization can reduce fitness by either introducing alleles to a population that are not suited to the local environment (extrinsic outbreeding depression) or disrupting co-adapted gene complexes (intrinsic outbreeding depression)(Templeton 1986).

This outbreeding depression suggests that even low levels of admixture may have negative effects on fitness in the wild and that policies protecting hybridized populations may need reconsideration.

«There is no definitive evidence of outbreeding depression among Bornean orang - utans,» says Banes, «but our findings are enough to cause serious alarm.»

First, we do not know the life stage (s) at which outbreeding depression occurred.

However, the high reproductive success of F1 hybrids relative to post-F1 hybrids with similar amounts of admixture suggests that some of the outbreeding depression is intrinsic.

Second, the extent to which outbreeding depression may be affected by the environment is unknown.

A major consequence of such interspecific hybridization may be outbreeding depression due to the break - up of co-adapted gene complexes and disruption of local adaptations (Barton & Hewitt 1989).