PUBLICATION
Two classes of deleterious recessive alleles in a natural population of zebrafish, Danio rerio
- Authors
- McCune, A.R., Houle, D., McMillan, K., Annable, R., and Kondrashov, A.S.
- ID
- ZDB-PUB-041004-19
- Date
- 2004
- Source
- Proceedings. Biological sciences 271(1552): 2025-2033 (Journal)
- Registered Authors
- McCune, Amy
- Keywords
- inbreeding depression, lethal equivalent, variance, mortality, growth rate, zebrafish
- MeSH Terms
-
- Alleles*
- Animals
- Crosses, Genetic
- Eating/physiology
- Female
- Genes, Lethal/physiology*
- Inbreeding
- Male
- Survival Analysis
- Zebrafish/genetics*
- PubMed
- 15451692 Full text @ Proc. Biol. Sci.
Citation
McCune, A.R., Houle, D., McMillan, K., Annable, R., and Kondrashov, A.S. (2004) Two classes of deleterious recessive alleles in a natural population of zebrafish, Danio rerio. Proceedings. Biological sciences. 271(1552):2025-2033.
Abstract
Natural populations carry deleterious recessive alleles which cause inbreeding depression. We compared mortality and growth of inbred and outbred zebrafish, Danio rerio, between 6 and 48 days of age. Grandparents of the studied fish were caught in the wild. Inbred fish were generated by brother-sister mating. Mortality was 9% in outbred fish, and 42% in inbred fish, which implies at least 3.6 lethal equivalents of deleterious recessive alleles per zygote. There was no significant inbreeding depression in the growth, perhaps because the surviving inbred fish lived under less crowded conditions. In contrast to alleles that cause embryonic and early larval mortality in the same population, alleles responsible for late larval and early juvenile mortality did not result in any gross morphological abnormalities. Thus, deleterious recessive alleles that segregate in a wild zebrafish population belong to two sharply distinct classes: early-acting, morphologically overt, unconditional lethals; and later-acting, morphologically cryptic, and presumably milder alleles.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping