Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed
The expansion of intensive livestock production systems in developing countries has increased the introduction of highly productive exotic breeds facilitating indiscriminate crossbreeding with local breeds. In this study, we set out to investigate the genetic status of the Vietnamese Black H'mong pig breed by evaluating (1) genetic diversity and (2) introgression from exotic breeds. Two exotic breeds, namely Landrace and Yorkshire used for crossbreeding, and the H'mong pig population from Ha Giang (HG) province were investigated using microsatellite markers. Within the province, three phenotypes were observed: a White, a Spotted and a Black phenotype. Genetic differentiation between phenotypes was low (0.5-6.1%). The White phenotypes showed intermediate admixture values between exotic breeds and the Black HG population (0.53), indicating a crossbreed status. Management practices were used to predict the rate of private diversity loss due to exotic gene introgressions. After 60 generations, 100% of Black private alleles will be lost. This loss is accelerated if the admixture rate is increased but can be slowed down if the mortality rate (e.g., recruitment rate) is decreased. Our study showed that a large number of markers are needed for accurately identifying hybrid classes for closely related populations. While our estimate of admixture still seems underestimated, genetic erosion can occur very fast even through indiscriminate crossbreeding.
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Subjects: | L10 - Génétique et amélioration des animaux, porcin, variation génétique, race introduite, race indigène, ressource génétique animale, génétique des populations, conservation des ressources, amélioration des animaux, http://aims.fao.org/aos/agrovoc/c_7555, http://aims.fao.org/aos/agrovoc/c_15975, http://aims.fao.org/aos/agrovoc/c_32892, http://aims.fao.org/aos/agrovoc/c_4177, http://aims.fao.org/aos/agrovoc/c_37418, http://aims.fao.org/aos/agrovoc/c_34326, http://aims.fao.org/aos/agrovoc/c_6523, http://aims.fao.org/aos/agrovoc/c_423, http://aims.fao.org/aos/agrovoc/c_8227, |
Online Access: | http://agritrop.cirad.fr/564150/ http://agritrop.cirad.fr/564150/1/document_564150.pdf |
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dig-cirad-fr-5641502024-01-28T20:25:16Z http://agritrop.cirad.fr/564150/ http://agritrop.cirad.fr/564150/ Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed. Berthouly-Salazar Cécile, Thevenon Sophie, Thu Nhu Van, Trong Nguyen Binh, Pham Lan Doan, Vu Chi Cuong, Maillard Jean-Charles. 2012. Ecology and Evolution, 2 (5) : 962-975.https://doi.org/10.1002/ece3.229 <https://doi.org/10.1002/ece3.229> Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed Berthouly-Salazar, Cécile Thevenon, Sophie Thu Nhu Van, Trong Nguyen, Binh Pham, Lan Doan Vu Chi Cuong, Maillard, Jean-Charles eng 2012 Ecology and Evolution L10 - Génétique et amélioration des animaux porcin variation génétique race introduite race indigène ressource génétique animale génétique des populations conservation des ressources amélioration des animaux http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_32892 http://aims.fao.org/aos/agrovoc/c_4177 http://aims.fao.org/aos/agrovoc/c_37418 http://aims.fao.org/aos/agrovoc/c_34326 http://aims.fao.org/aos/agrovoc/c_6523 http://aims.fao.org/aos/agrovoc/c_423 Viet Nam http://aims.fao.org/aos/agrovoc/c_8227 The expansion of intensive livestock production systems in developing countries has increased the introduction of highly productive exotic breeds facilitating indiscriminate crossbreeding with local breeds. In this study, we set out to investigate the genetic status of the Vietnamese Black H'mong pig breed by evaluating (1) genetic diversity and (2) introgression from exotic breeds. Two exotic breeds, namely Landrace and Yorkshire used for crossbreeding, and the H'mong pig population from Ha Giang (HG) province were investigated using microsatellite markers. Within the province, three phenotypes were observed: a White, a Spotted and a Black phenotype. Genetic differentiation between phenotypes was low (0.5-6.1%). The White phenotypes showed intermediate admixture values between exotic breeds and the Black HG population (0.53), indicating a crossbreed status. Management practices were used to predict the rate of private diversity loss due to exotic gene introgressions. After 60 generations, 100% of Black private alleles will be lost. This loss is accelerated if the admixture rate is increased but can be slowed down if the mortality rate (e.g., recruitment rate) is decreased. Our study showed that a large number of markers are needed for accurately identifying hybrid classes for closely related populations. While our estimate of admixture still seems underestimated, genetic erosion can occur very fast even through indiscriminate crossbreeding. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/564150/1/document_564150.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1002/ece3.229 10.1002/ece3.229 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=214678 info:eu-repo/semantics/altIdentifier/doi/10.1002/ece3.229 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1002/ece3.229 |
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L10 - Génétique et amélioration des animaux porcin variation génétique race introduite race indigène ressource génétique animale génétique des populations conservation des ressources amélioration des animaux http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_32892 http://aims.fao.org/aos/agrovoc/c_4177 http://aims.fao.org/aos/agrovoc/c_37418 http://aims.fao.org/aos/agrovoc/c_34326 http://aims.fao.org/aos/agrovoc/c_6523 http://aims.fao.org/aos/agrovoc/c_423 http://aims.fao.org/aos/agrovoc/c_8227 L10 - Génétique et amélioration des animaux porcin variation génétique race introduite race indigène ressource génétique animale génétique des populations conservation des ressources amélioration des animaux http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_32892 http://aims.fao.org/aos/agrovoc/c_4177 http://aims.fao.org/aos/agrovoc/c_37418 http://aims.fao.org/aos/agrovoc/c_34326 http://aims.fao.org/aos/agrovoc/c_6523 http://aims.fao.org/aos/agrovoc/c_423 http://aims.fao.org/aos/agrovoc/c_8227 |
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L10 - Génétique et amélioration des animaux porcin variation génétique race introduite race indigène ressource génétique animale génétique des populations conservation des ressources amélioration des animaux http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_32892 http://aims.fao.org/aos/agrovoc/c_4177 http://aims.fao.org/aos/agrovoc/c_37418 http://aims.fao.org/aos/agrovoc/c_34326 http://aims.fao.org/aos/agrovoc/c_6523 http://aims.fao.org/aos/agrovoc/c_423 http://aims.fao.org/aos/agrovoc/c_8227 L10 - Génétique et amélioration des animaux porcin variation génétique race introduite race indigène ressource génétique animale génétique des populations conservation des ressources amélioration des animaux http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_32892 http://aims.fao.org/aos/agrovoc/c_4177 http://aims.fao.org/aos/agrovoc/c_37418 http://aims.fao.org/aos/agrovoc/c_34326 http://aims.fao.org/aos/agrovoc/c_6523 http://aims.fao.org/aos/agrovoc/c_423 http://aims.fao.org/aos/agrovoc/c_8227 Berthouly-Salazar, Cécile Thevenon, Sophie Thu Nhu Van, Trong Nguyen, Binh Pham, Lan Doan Vu Chi Cuong, Maillard, Jean-Charles Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed |
description |
The expansion of intensive livestock production systems in developing countries has increased the introduction of highly productive exotic breeds facilitating indiscriminate crossbreeding with local breeds. In this study, we set out to investigate the genetic status of the Vietnamese Black H'mong pig breed by evaluating (1) genetic diversity and (2) introgression from exotic breeds. Two exotic breeds, namely Landrace and Yorkshire used for crossbreeding, and the H'mong pig population from Ha Giang (HG) province were investigated using microsatellite markers. Within the province, three phenotypes were observed: a White, a Spotted and a Black phenotype. Genetic differentiation between phenotypes was low (0.5-6.1%). The White phenotypes showed intermediate admixture values between exotic breeds and the Black HG population (0.53), indicating a crossbreed status. Management practices were used to predict the rate of private diversity loss due to exotic gene introgressions. After 60 generations, 100% of Black private alleles will be lost. This loss is accelerated if the admixture rate is increased but can be slowed down if the mortality rate (e.g., recruitment rate) is decreased. Our study showed that a large number of markers are needed for accurately identifying hybrid classes for closely related populations. While our estimate of admixture still seems underestimated, genetic erosion can occur very fast even through indiscriminate crossbreeding. |
format |
article |
topic_facet |
L10 - Génétique et amélioration des animaux porcin variation génétique race introduite race indigène ressource génétique animale génétique des populations conservation des ressources amélioration des animaux http://aims.fao.org/aos/agrovoc/c_7555 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_32892 http://aims.fao.org/aos/agrovoc/c_4177 http://aims.fao.org/aos/agrovoc/c_37418 http://aims.fao.org/aos/agrovoc/c_34326 http://aims.fao.org/aos/agrovoc/c_6523 http://aims.fao.org/aos/agrovoc/c_423 http://aims.fao.org/aos/agrovoc/c_8227 |
author |
Berthouly-Salazar, Cécile Thevenon, Sophie Thu Nhu Van, Trong Nguyen, Binh Pham, Lan Doan Vu Chi Cuong, Maillard, Jean-Charles |
author_facet |
Berthouly-Salazar, Cécile Thevenon, Sophie Thu Nhu Van, Trong Nguyen, Binh Pham, Lan Doan Vu Chi Cuong, Maillard, Jean-Charles |
author_sort |
Berthouly-Salazar, Cécile |
title |
Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed |
title_short |
Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed |
title_full |
Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed |
title_fullStr |
Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed |
title_full_unstemmed |
Uncontrolled admixture and loss of genetic diversity in a local Vietnamese pig breed |
title_sort |
uncontrolled admixture and loss of genetic diversity in a local vietnamese pig breed |
url |
http://agritrop.cirad.fr/564150/ http://agritrop.cirad.fr/564150/1/document_564150.pdf |
work_keys_str_mv |
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_version_ |
1792498177909194752 |