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Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densitie

Shrimp is one of few marine species cultured worldwide for which several selective breeding programs are being conducted. One environmental factor that can affect the response to selection in breeding programs is the density at which the shrimp are cultured (low-medium-high). Phenotypic plasticity i...

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Detalles Bibliográficos
Autores principales: Ibarra, Ana M, Famula, Thomas R
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2674889/
https://www.ncbi.nlm.nih.gov/pubmed/18694549
http://dx.doi.org/10.1186/1297-9686-40-5-541
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author Ibarra, Ana M
Famula, Thomas R
author_facet Ibarra, Ana M
Famula, Thomas R
author_sort Ibarra, Ana M
collection PubMed
description Shrimp is one of few marine species cultured worldwide for which several selective breeding programs are being conducted. One environmental factor that can affect the response to selection in breeding programs is the density at which the shrimp are cultured (low-medium-high). Phenotypic plasticity in the growth response to different densities might be accompanied by a significant genotype by environment interaction, evidenced by a change in heritabilities between environments and by a genetic correlation less than one for a unique trait between environments. Our goal was to understand whether different growth densities affect estimates of those genetic parameters for adult body weight (BW) in the Pacific white shrimp (Penaeus vannamei). BW heritabilities were significantly different between environments, with the largest at high density. These differences resulted from both an increased additive genetic variance and a decreased environmental variance when grown at high density. The genetic correlation between BWs at the two environmental conditions was significantly less than one. Whereas these results might be suggestive for carrying out shrimp selective breeding for BW under high density conditions, further understanding of genetic correlations between growth and reproductive traits within a given environment is necessary, as there are indications of reduced reproductive fitness for shrimp grown at high densities.
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spelling pubmed-26748892009-04-30 Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densitie Ibarra, Ana M Famula, Thomas R Genet Sel Evol Research Shrimp is one of few marine species cultured worldwide for which several selective breeding programs are being conducted. One environmental factor that can affect the response to selection in breeding programs is the density at which the shrimp are cultured (low-medium-high). Phenotypic plasticity in the growth response to different densities might be accompanied by a significant genotype by environment interaction, evidenced by a change in heritabilities between environments and by a genetic correlation less than one for a unique trait between environments. Our goal was to understand whether different growth densities affect estimates of those genetic parameters for adult body weight (BW) in the Pacific white shrimp (Penaeus vannamei). BW heritabilities were significantly different between environments, with the largest at high density. These differences resulted from both an increased additive genetic variance and a decreased environmental variance when grown at high density. The genetic correlation between BWs at the two environmental conditions was significantly less than one. Whereas these results might be suggestive for carrying out shrimp selective breeding for BW under high density conditions, further understanding of genetic correlations between growth and reproductive traits within a given environment is necessary, as there are indications of reduced reproductive fitness for shrimp grown at high densities. BioMed Central 2008-09-15 /pmc/articles/PMC2674889/ /pubmed/18694549 http://dx.doi.org/10.1186/1297-9686-40-5-541 Text en Copyright © 2008 INRA, EDP Sciences
spellingShingle Research
Ibarra, Ana M
Famula, Thomas R
Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densitie
title Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densitie
title_full Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densitie
title_fullStr Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densitie
title_full_unstemmed Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densitie
title_short Genotype by environment interaction for adult body weights of shrimp Penaeus vannamei when grown at low and high densitie
title_sort genotype by environment interaction for adult body weights of shrimp penaeus vannamei when grown at low and high densitie
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2674889/
https://www.ncbi.nlm.nih.gov/pubmed/18694549
http://dx.doi.org/10.1186/1297-9686-40-5-541
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