Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200015 |
Resumo: | The intrapopulation fixation index ( f ) is inversely related to the outcrossing rate (t). Results obtained from data on molecular markers of natural populations have shown that these values are highly variable, even when measured in the same group of individuals. It is thus suggested that factors besides those described in Wright's genetic equilibrium must be operating. Using simulated data sets this study shows that the finite size condition of a population is sufficient to spread the estimated f values along a range at equilibrium, as opposed to keeping them at the theoretical equilibrium point. The variation in outcrossing rates can amplify this range considerably. Correlation between estimated f values obtained from different loci in this condition showed to be negatively related to the outcrossing rates, and positively related to the variance of these rates along generations. The finite size of populations associated to small fluctuations in t mean values over time may explain the usually reported high variation among estimated f values of different loci. |
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Scientia Agrícola (Online) |
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Intrapopulation fixation index dynamics in finite populations with variable outcrossing ratespopulation geneticsinbreedingcomputer simulationThe intrapopulation fixation index ( f ) is inversely related to the outcrossing rate (t). Results obtained from data on molecular markers of natural populations have shown that these values are highly variable, even when measured in the same group of individuals. It is thus suggested that factors besides those described in Wright's genetic equilibrium must be operating. Using simulated data sets this study shows that the finite size condition of a population is sufficient to spread the estimated f values along a range at equilibrium, as opposed to keeping them at the theoretical equilibrium point. The variation in outcrossing rates can amplify this range considerably. Correlation between estimated f values obtained from different loci in this condition showed to be negatively related to the outcrossing rates, and positively related to the variance of these rates along generations. The finite size of populations associated to small fluctuations in t mean values over time may explain the usually reported high variation among estimated f values of different loci.Escola Superior de Agricultura "Luiz de Queiroz"2003-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200015Scientia Agricola v.60 n.2 2003reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162003000200015info:eu-repo/semantics/openAccessCoelho,Alexandre Siqueira GuedesVencovsky,Rolandeng2003-05-15T00:00:00Zoai:scielo:S0103-90162003000200015Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2003-05-15T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates |
title |
Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates |
spellingShingle |
Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates Coelho,Alexandre Siqueira Guedes population genetics inbreeding computer simulation |
title_short |
Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates |
title_full |
Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates |
title_fullStr |
Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates |
title_full_unstemmed |
Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates |
title_sort |
Intrapopulation fixation index dynamics in finite populations with variable outcrossing rates |
author |
Coelho,Alexandre Siqueira Guedes |
author_facet |
Coelho,Alexandre Siqueira Guedes Vencovsky,Roland |
author_role |
author |
author2 |
Vencovsky,Roland |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Coelho,Alexandre Siqueira Guedes Vencovsky,Roland |
dc.subject.por.fl_str_mv |
population genetics inbreeding computer simulation |
topic |
population genetics inbreeding computer simulation |
description |
The intrapopulation fixation index ( f ) is inversely related to the outcrossing rate (t). Results obtained from data on molecular markers of natural populations have shown that these values are highly variable, even when measured in the same group of individuals. It is thus suggested that factors besides those described in Wright's genetic equilibrium must be operating. Using simulated data sets this study shows that the finite size condition of a population is sufficient to spread the estimated f values along a range at equilibrium, as opposed to keeping them at the theoretical equilibrium point. The variation in outcrossing rates can amplify this range considerably. Correlation between estimated f values obtained from different loci in this condition showed to be negatively related to the outcrossing rates, and positively related to the variance of these rates along generations. The finite size of populations associated to small fluctuations in t mean values over time may explain the usually reported high variation among estimated f values of different loci. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162003000200015 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.60 n.2 2003 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936458830348288 |