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  • Strategic marker selection to detect quantitative trait loci in chicken

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    RuyPUB8311.pdf (83.85Kb)
    Author(s)
    Ruy, Deborah Clea
    Nones, Katia
    Baron, Erica Elias
    Ledur, Mônica Corrêa
    Rodrigues de Melo, Cláudio Manoel
    Ambo, Marcel
    Lello Rocha Campos, Raquel
    Coutinho, Luiz Lehmann
    Griffith University Author(s)
    Nones, Katia
    Year published
    2005
    Metadata
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    Abstract
    Selective genotyping for a certain trait in individuals with extreme phenotypes contributes sufficient information to determine linkage between molecular markers and quantitative trait loci (QTL). In this experiment an F2 population, developed by crossing males from a broiler line with females from a layer line, was employed to detect QTL on chromosomes 3 and 5. Twenty-eight performance and carcass traits were measured in F2 offspring, and phenotypic correlations between traits were calculated. Body weight at 42 days (BW42) presented the greatest positive correlations with most other traits, with correlation between body ...
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    Selective genotyping for a certain trait in individuals with extreme phenotypes contributes sufficient information to determine linkage between molecular markers and quantitative trait loci (QTL). In this experiment an F2 population, developed by crossing males from a broiler line with females from a layer line, was employed to detect QTL on chromosomes 3 and 5. Twenty-eight performance and carcass traits were measured in F2 offspring, and phenotypic correlations between traits were calculated. Body weight at 42 days (BW42) presented the greatest positive correlations with most other traits, with correlation between body weights at 35 and 41 days, weight gain between birth and 35, 41 and 42 days, as well as weights of carcass and some body parts superior to 0.8. One hundred-and-seventy F2 offspring, representing the top (4.5%) and the bottom (4.5%) of a normal distribution curve of BW42, were selected with equal proportions of males and females, and within dam family. Samples were genotyped for 19 informative markers on chromosome 3, and 11 markers on chromosome 5. Marker allelic frequencies of phenotypic groups with high and low BW42 were compared with a chi-square test. Four regions on chromosome 3 and three regions on chromosome 5 had markers that were suggestively associated with BW42 (P < 0.10), confirming and expanding previous studies.
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    Journal Title
    Scientia Agricola
    Volume
    62
    Issue
    2
    DOI
    https://doi.org/10.1590/S0103-90162005000200003
    Copyright Statement
    © 2005. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Agricultural Biotechnology not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/28122
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    • Journal articles

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