The people, though still sturdy, seem to have become somewhat dull from inbreeding
and to have required an infusion of altogether different blood from without.
Increased homozygosity leads to inbreeding
depression if the recessive alleles are detrimental.
is a specific case of matrimonial ties between spouses.
Increasing the size of the breeding operation had a less pronounced effect on the increase in genetic gain compared with tolerating high rates of inbreeding
and running a more aggressive selection approach.
All "breeds" were originally created with some degree of inbreeding
and linebreeding to "fix" certain desired traits that were seen in the foundation animals.
to Northern Dancer is now commonplace rather than the exception but even so, sending a Stravinsky mare to Peintre Celebre, which results in tight inbreeding
to Nureyev, might have been regarded as being on the risky side in some quarters.
Though the genetic harms of inbreeding
are well known, kin marriages produce (on an average) more viable offspring than the (non-inbreeding
) alternative of no marriage.
In small, isolated populations mating amongst relatives and inbreeding
They want to find out if decreasing numbers of adders in the region has led to inbreeding
Charles Darwin's family was a living human example of a theory that he developed about plants: that inbreeding
could affect negatively the health and number of resulting offspring.
The increase in inbreeding
per generation has been kept low as matings between close relatives have been avoided.
However, participating institutions have expressed concerns regarding space allocation, target population size (TPS), breeding restrictions, inbreeding
depression, and harvest in relation to future population availability and viability.