genetic load


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Related to genetic load: balanced polymorphism

genetic load

[jə¦ned·ik ′lōd]
(genetics)
The reduction in fitness of a diploid population due to new mutant genes and those already in the gene pool.
References in periodicals archive ?
This decline results from inbreeding depression, a symptom of genetic load (Busbice, 1968, 1996; Jones and Bingham, 1995; Kimbeng, 1996).
A major issue is what level of inbreeding depression is maintained in partially self-fertilizing populations given the purging effects of self-fertilization on genetic load.
Reproductive success, spontaneous embryo abortion, and genetic load in flowering plants.
High genetic load resolves two long-debated issues in bivalve genetics: (1) common distortions of Mendelian inheritance ratios in laboratory-reared progeny of wild parents (Wada 1975, Beaumont et al.
In particular, selection would reduce or purge the genetic load of deleterious recessive alleles from populations that regularly inbreed, resulting in populations that had become at least partly "adapted" to inbreeding (Lande and Schemske 1985).
We test for purging of genetic load for important qualitative and quantitative components of potential male and female reproductive success.
Such a cross would also tend to equalize the genetic load among families.
Considerable genetic load may accumulate as selection against the self-progeny per se removes the opportunity to purge only the deleterious alleles (Uyenoyama et al.
Experiments with Drosophila indicate that about half of the genetic load with respect to viability results from recessive lethal alleles (Simmons and Crow 1977).
An interesting result is that selection against deleterious alleles leads to a purge of the genetic load when inbreeding increases.
These studies have revealed that the alleles responsible for inbreeding depression, collectively referred to as the genetic load (Morton et al.