Multilocus estimation of gene diversity in tropical trees reveals important species differences
Levels of genetic diversity were estimated for 8 forest trees of French Guiana which were selected because of their contrasting life history traits. Multilocus methods are used as RAPDs or AFLPs in order to assess genetic diversity at the whole genome level. However these markers suffer from a major drawback: they behave generally as dominant markers. Theoretical calculations were made to compare two different methods to assess genetic diversity with dominant markers, the phenotypic diversity (Hp) that considers presence and absence of fragments versus the genotypic diversity (Hg) that considers the alleles responsible for the presence or the absence of the bands. It is shown that these values (Hp and Hg) can only be compared in a limited number of cases, according to the frequency of the bands. The genetic monitoring of gene diversity is based on a two step sampling procedure: (i) the intra-locus sampling, e.g. sampling of trees and populations and (ii) the inter-locus sampling, e.g. sampling of loci within the genome. The associated components of sampling variance were estimated using resampling methods in order to make species comparisons. It is shown for both markers that the inter-locus variance exceeds by far (5 to 10 times) the intra-locus variance. Furthermore both components of the sampling variance are much higher for RAPDs than for AFLPs, even if both markers provide congruent rankings of the species. There are striking differences in the level of phenotypic and genotypic diversity among the species. (Texte intégral)
Main Authors: | , , , , , , , , |
---|---|
Format: | conference_item biblioteca |
Language: | eng |
Published: |
s.n.
|
Subjects: | F30 - Génétique et amélioration des plantes, arbre, zone tropicale, variation génétique, http://aims.fao.org/aos/agrovoc/c_7887, http://aims.fao.org/aos/agrovoc/c_7979, http://aims.fao.org/aos/agrovoc/c_15975, http://aims.fao.org/aos/agrovoc/c_3093, http://aims.fao.org/aos/agrovoc/c_3081, |
Online Access: | http://agritrop.cirad.fr/512266/ |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-cirad-fr-512266 |
---|---|
record_format |
koha |
spelling |
dig-cirad-fr-5122662024-01-28T11:08:07Z http://agritrop.cirad.fr/512266/ http://agritrop.cirad.fr/512266/ Multilocus estimation of gene diversity in tropical trees reveals important species differences. Caron Henri, Bandou Eric, Maggia Laurent, Sucher Frédéric, Chevallier Marie-Hélène, Leveau Antoine, Bodenes Catherine, Coppaert Nathalie, Breyne Peter. 2001. . s.l. : s.n., Résumé Plant and Animal Genomes Conference. 9, San Diego, États-Unis, 13 Janvier 2001/17 Janvier 2001.http://www.intl-pag.org/pag/9/abstracts/P3a_05.html <http://www.intl-pag.org/pag/9/abstracts/P3a_05.html> Multilocus estimation of gene diversity in tropical trees reveals important species differences Caron, Henri Bandou, Eric Maggia, Laurent Sucher, Frédéric Chevallier, Marie-Hélène Leveau, Antoine Bodenes, Catherine Coppaert, Nathalie Breyne, Peter eng 2001 s.n. F30 - Génétique et amélioration des plantes arbre zone tropicale variation génétique http://aims.fao.org/aos/agrovoc/c_7887 http://aims.fao.org/aos/agrovoc/c_7979 http://aims.fao.org/aos/agrovoc/c_15975 Guyane française France http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 Levels of genetic diversity were estimated for 8 forest trees of French Guiana which were selected because of their contrasting life history traits. Multilocus methods are used as RAPDs or AFLPs in order to assess genetic diversity at the whole genome level. However these markers suffer from a major drawback: they behave generally as dominant markers. Theoretical calculations were made to compare two different methods to assess genetic diversity with dominant markers, the phenotypic diversity (Hp) that considers presence and absence of fragments versus the genotypic diversity (Hg) that considers the alleles responsible for the presence or the absence of the bands. It is shown that these values (Hp and Hg) can only be compared in a limited number of cases, according to the frequency of the bands. The genetic monitoring of gene diversity is based on a two step sampling procedure: (i) the intra-locus sampling, e.g. sampling of trees and populations and (ii) the inter-locus sampling, e.g. sampling of loci within the genome. The associated components of sampling variance were estimated using resampling methods in order to make species comparisons. It is shown for both markers that the inter-locus variance exceeds by far (5 to 10 times) the intra-locus variance. Furthermore both components of the sampling variance are much higher for RAPDs than for AFLPs, even if both markers provide congruent rankings of the species. There are striking differences in the level of phenotypic and genotypic diversity among the species. (Texte intégral) conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/closedAccess http://www.intl-pag.org/pag/9/abstracts/P3a_05.html http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=175882 info:eu-repo/semantics/altIdentifier/purl/http://www.intl-pag.org/pag/9/abstracts/P3a_05.html |
institution |
CIRAD FR |
collection |
DSpace |
country |
Francia |
countrycode |
FR |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-cirad-fr |
tag |
biblioteca |
region |
Europa del Oeste |
libraryname |
Biblioteca del CIRAD Francia |
language |
eng |
topic |
F30 - Génétique et amélioration des plantes arbre zone tropicale variation génétique http://aims.fao.org/aos/agrovoc/c_7887 http://aims.fao.org/aos/agrovoc/c_7979 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 F30 - Génétique et amélioration des plantes arbre zone tropicale variation génétique http://aims.fao.org/aos/agrovoc/c_7887 http://aims.fao.org/aos/agrovoc/c_7979 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 |
spellingShingle |
F30 - Génétique et amélioration des plantes arbre zone tropicale variation génétique http://aims.fao.org/aos/agrovoc/c_7887 http://aims.fao.org/aos/agrovoc/c_7979 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 F30 - Génétique et amélioration des plantes arbre zone tropicale variation génétique http://aims.fao.org/aos/agrovoc/c_7887 http://aims.fao.org/aos/agrovoc/c_7979 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 Caron, Henri Bandou, Eric Maggia, Laurent Sucher, Frédéric Chevallier, Marie-Hélène Leveau, Antoine Bodenes, Catherine Coppaert, Nathalie Breyne, Peter Multilocus estimation of gene diversity in tropical trees reveals important species differences |
description |
Levels of genetic diversity were estimated for 8 forest trees of French Guiana which were selected because of their contrasting life history traits. Multilocus methods are used as RAPDs or AFLPs in order to assess genetic diversity at the whole genome level. However these markers suffer from a major drawback: they behave generally as dominant markers. Theoretical calculations were made to compare two different methods to assess genetic diversity with dominant markers, the phenotypic diversity (Hp) that considers presence and absence of fragments versus the genotypic diversity (Hg) that considers the alleles responsible for the presence or the absence of the bands. It is shown that these values (Hp and Hg) can only be compared in a limited number of cases, according to the frequency of the bands. The genetic monitoring of gene diversity is based on a two step sampling procedure: (i) the intra-locus sampling, e.g. sampling of trees and populations and (ii) the inter-locus sampling, e.g. sampling of loci within the genome. The associated components of sampling variance were estimated using resampling methods in order to make species comparisons. It is shown for both markers that the inter-locus variance exceeds by far (5 to 10 times) the intra-locus variance. Furthermore both components of the sampling variance are much higher for RAPDs than for AFLPs, even if both markers provide congruent rankings of the species. There are striking differences in the level of phenotypic and genotypic diversity among the species. (Texte intégral) |
format |
conference_item |
topic_facet |
F30 - Génétique et amélioration des plantes arbre zone tropicale variation génétique http://aims.fao.org/aos/agrovoc/c_7887 http://aims.fao.org/aos/agrovoc/c_7979 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_3093 http://aims.fao.org/aos/agrovoc/c_3081 |
author |
Caron, Henri Bandou, Eric Maggia, Laurent Sucher, Frédéric Chevallier, Marie-Hélène Leveau, Antoine Bodenes, Catherine Coppaert, Nathalie Breyne, Peter |
author_facet |
Caron, Henri Bandou, Eric Maggia, Laurent Sucher, Frédéric Chevallier, Marie-Hélène Leveau, Antoine Bodenes, Catherine Coppaert, Nathalie Breyne, Peter |
author_sort |
Caron, Henri |
title |
Multilocus estimation of gene diversity in tropical trees reveals important species differences |
title_short |
Multilocus estimation of gene diversity in tropical trees reveals important species differences |
title_full |
Multilocus estimation of gene diversity in tropical trees reveals important species differences |
title_fullStr |
Multilocus estimation of gene diversity in tropical trees reveals important species differences |
title_full_unstemmed |
Multilocus estimation of gene diversity in tropical trees reveals important species differences |
title_sort |
multilocus estimation of gene diversity in tropical trees reveals important species differences |
publisher |
s.n. |
url |
http://agritrop.cirad.fr/512266/ |
work_keys_str_mv |
AT caronhenri multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences AT bandoueric multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences AT maggialaurent multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences AT sucherfrederic multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences AT chevalliermariehelene multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences AT leveauantoine multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences AT bodenescatherine multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences AT coppaertnathalie multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences AT breynepeter multilocusestimationofgenediversityintropicaltreesrevealsimportantspeciesdifferences |
_version_ |
1792495474374082560 |