BIO220H1 Lecture Notes - Lecture 15: Conservation Genetics, Inbreeding Depression, Depauperate Ecosystem

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azuresquirrel208

19 Apr 2012

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#, kinds of organisms in a given area. Intrapspecific variation/ genetic diversity: studied by evolutionary geneticists. Conservation genetics: within individuals (heterozygosity, between individuals in same population, between populations of the same species, apply genetic methods to conservation, restoration, endangered species, different solutions address loss of genetic diversity at each of 3 levels management. Case: cheetahs: genetically depauperate, low polymorphic loci in population, low heterozygosity in individuals, mhc locus. In captive cheetahs: lacks variation, captive cheetahs do not reject skin grafts from others, decreased sperm count, high disease load. Early view: historical bottleneck, decreased ne, disease, mhc symptoms, interactive effect of loss of genetic diversity and. Inbreeding during decreased n/ne further reduced n. ne threats to population persistence. Conclusions: genetic diversity no affect on disease susceptibility/demography in wild, depending on how genetic diversity measured (allele #, nucleotide diversity, amino acid sequence diversity), cheetahs show either decreased genetic diversity or similar diversity to other organisms.

Related Questions

What is the difference between genetic diversity and geneticvariation? Explain a the mechanisms of genetic variation discussedin this course. Give an examples of how these mechanisms haveimpacted evolution in a species.

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Suppose the phylogenetic species concept were adopted in place of the biological species concept. What would be the implications for (a) evolutionary discourse on the mechanisms of speciation; (b) studies of species diversity in ecological communities; (c) estimates of species diversity on a worldwide basis; (d) conservation practices under such legal frameworks as the U.S. Endangered Species Act?