GENE20001 Lecture Notes - Lecture 33: Genetic Drift, Allele Frequency, Florida Today
Document Summary
In this pedigree very few individuals contribute to next gen. much inbreeding. The numbers are the inbreeding coefficients if two individuals bred. Note the extremely high mortality rates for this animals. Random mating would produce about 1/100 affected birds. However mating is not random due to captive breeding. Breeders attempt to pair up individuals to reduce incidence of chondrodystrophy. Population is so small that there is much inbreeding and a movement of alleles (in this case the chondrodystrophy allele) due to genetic drift. Problem that most of the mutant alleles in heterozygotes (43 birds) By 1920 range limited to south and central florida. Frequency of a rare heritable defect cryptorchidism (undescended testes) is now 80% Microbial pathogen disease load enormous (e. g. feline immunodeficiency virus) Genetic rescue: texas cougar a close relative and traditional breeding partner. Texas cougar released in 1995 to increase gene pool. Threatened: 20% of mammals (including polar bear and.
