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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
10/08/1994 |
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Data da última atualização: |
10/07/2025 |
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Autoria: |
NEI, M.; MARUYAMA, T.; CHAKRABORTY, R. |
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Título: |
The bottleneck effect and genetic variability in populations. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Evolution, v. 29, p. 1-10, 1975. |
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Idioma: |
Inglês |
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Conteúdo: |
In a population of constant size the expected heterozygosity for a neutral locus when mutation and genetic drift are balanced is given by 4 Nv/(4Nv + 1) under the assumption that new mutations are always different from the pre-existing alleles in the population, where N is the effective population size and v the mutation rate per locus per generation (Kimura, 1968). The size of a natural population, however, often changes drastically in the evolutionary process. In an extreme case a single inseminated female from a large population may migrate to an unoccupied geographical or ecological territory and establish a new colony, followed by rapid population growth to form a new species. This process seems to have occurred repeatedly in the evolution of Hawaiian Drosophila species (Carson, 1970; 1971) and also in the establishment of the Bogota, Colombia, population of Drosophila pseudoobscura (Prakash, 1972). |
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Palavras-Chave: |
Variabilidade genética. |
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Thesagro: |
População. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
LEADER 01380naa a2200169 a 4500
001 1280060
005 2025-07-10
008 1975 bl uuuu u00u1 u #d
100 1 $aNEI, M.
245 $aThe bottleneck effect and genetic variability in populations.$h[electronic resource]
260 $c1975
520 $aIn a population of constant size the expected heterozygosity for a neutral locus when mutation and genetic drift are balanced is given by 4 Nv/(4Nv + 1) under the assumption that new mutations are always different from the pre-existing alleles in the population, where N is the effective population size and v the mutation rate per locus per generation (Kimura, 1968). The size of a natural population, however, often changes drastically in the evolutionary process. In an extreme case a single inseminated female from a large population may migrate to an unoccupied geographical or ecological territory and establish a new colony, followed by rapid population growth to form a new species. This process seems to have occurred repeatedly in the evolution of Hawaiian Drosophila species (Carson, 1970; 1971) and also in the establishment of the Bogota, Colombia, population of Drosophila pseudoobscura (Prakash, 1972).
650 $aPopulação
653 $aVariabilidade genética
700 1 $aMARUYAMA, T.
700 1 $aCHAKRABORTY, R.
773 $tEvolution$gv. 29, p. 1-10, 1975.
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