Genetic parameters for carcass and meat quality traits and their relationships to liveweight and wool production in hogget Merino rams

Genetic parameters for carcass and meat quality traits of about 18-month-old Merino rams (n = 5870), the progeny of 543 sires from three research resource flocks, were estimated. The estimates of heritability for hot carcass weight (HCW) and the various fat and muscle dimension measurements were mod...

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Veröffentlicht in:Journal of animal breeding and genetics (1986) 2008-06, Vol.125 (3), p.205-215
Hauptverfasser: Greeff, J.C, Safari, E, Fogarty, N.M, Hopkins, D.L, Brien, F.D, Atkins, K.D, Mortimer, S.I, van der Werf, J.H.J
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container_end_page 215
container_issue 3
container_start_page 205
container_title Journal of animal breeding and genetics (1986)
container_volume 125
creator Greeff, J.C
Safari, E
Fogarty, N.M
Hopkins, D.L
Brien, F.D
Atkins, K.D
Mortimer, S.I
van der Werf, J.H.J
description Genetic parameters for carcass and meat quality traits of about 18-month-old Merino rams (n = 5870), the progeny of 543 sires from three research resource flocks, were estimated. The estimates of heritability for hot carcass weight (HCW) and the various fat and muscle dimension measurements were moderate and ranged from 0.20 to 0.37. The brightness of meat (colour L*, 0.18 ± 0.03 standard error) and meat pH (0.22 ± 0.03) also had moderate estimates of heritability, although meat relative redness (colour a*, 0.10 ± 0.03) and relative yellowness (colour b*, 0.10 ± 0.03) were lower. Heritability estimates for live weights were moderate and ranged from 0.29 to 0.41 with significant permanent maternal environmental effects (0.13 to 0.10). The heritability estimates for the hogget wool traits were moderate to high and ranged from 0.27 to 0.60. The ultrasound measurements of fat depth (FATUS) and eye muscle depth (EMDUS) on live animals were highly genetically correlated with the corresponding carcass measurements (0.69 ± 0.09 FATC and 0.77 ± 0.07 EMD). Carcass tissue depth (FATGR) had moderate to low genetic correlations with carcass muscle measurements [0.18 ± 0.10 EMD and 0.05 ± 0.10 eye muscle area (EMA)], while those with FATC were negative. The genetic correlation between EMD and eye muscle width (EMW) was 0.41 ± 0.08, while EMA was highly correlated with EMD (0.89 ± 0.0) and EMW (0.78 ± 0.04). The genetic correlations for muscle colour with muscle measurements were moderately negative, while those with fat measurements were close to zero. Meat pH was positively correlated with muscle measurements (0.14 to 0.17) and negatively correlated with fat measurements (-0.06 to -0.18). EMDUS also showed a similar pattern of correlations to EMD with meat quality indicator traits, although FATUS had positive correlations with these traits which were generally smaller than their standard error. The genetic correlations among the meat colour traits were high and positive while those with meat pH were high and negative, which were all in the favourable direction. Generally, phenotypic correlations were similar or slightly lower than the corresponding genetic correlations. There were generally small to moderate negative genetic correlations between clean fleece weight (CFW) and carcass fat traits while those with muscle traits were close to zero. As the Merino is already a relatively lean breed, this implies that particular attention should be given to this relationship i
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The estimates of heritability for hot carcass weight (HCW) and the various fat and muscle dimension measurements were moderate and ranged from 0.20 to 0.37. The brightness of meat (colour L*, 0.18 ± 0.03 standard error) and meat pH (0.22 ± 0.03) also had moderate estimates of heritability, although meat relative redness (colour a*, 0.10 ± 0.03) and relative yellowness (colour b*, 0.10 ± 0.03) were lower. Heritability estimates for live weights were moderate and ranged from 0.29 to 0.41 with significant permanent maternal environmental effects (0.13 to 0.10). The heritability estimates for the hogget wool traits were moderate to high and ranged from 0.27 to 0.60. The ultrasound measurements of fat depth (FATUS) and eye muscle depth (EMDUS) on live animals were highly genetically correlated with the corresponding carcass measurements (0.69 ± 0.09 FATC and 0.77 ± 0.07 EMD). Carcass tissue depth (FATGR) had moderate to low genetic correlations with carcass muscle measurements [0.18 ± 0.10 EMD and 0.05 ± 0.10 eye muscle area (EMA)], while those with FATC were negative. The genetic correlation between EMD and eye muscle width (EMW) was 0.41 ± 0.08, while EMA was highly correlated with EMD (0.89 ± 0.0) and EMW (0.78 ± 0.04). The genetic correlations for muscle colour with muscle measurements were moderately negative, while those with fat measurements were close to zero. Meat pH was positively correlated with muscle measurements (0.14 to 0.17) and negatively correlated with fat measurements (-0.06 to -0.18). EMDUS also showed a similar pattern of correlations to EMD with meat quality indicator traits, although FATUS had positive correlations with these traits which were generally smaller than their standard error. The genetic correlations among the meat colour traits were high and positive while those with meat pH were high and negative, which were all in the favourable direction. Generally, phenotypic correlations were similar or slightly lower than the corresponding genetic correlations. There were generally small to moderate negative genetic correlations between clean fleece weight (CFW) and carcass fat traits while those with muscle traits were close to zero. As the Merino is already a relatively lean breed, this implies that particular attention should be given to this relationship in Merino breeding programmes to prevent the reduction of fat reserves as a correlated response to selection for increased fleece weight. The ultrasound scan traits generally showed a similar pattern to the corresponding carcass fat and muscle traits. There was a small unfavourable genetic correlation between CFW and meat pH (0.19 ± 0.07).</description><identifier>ISSN: 0931-2668</identifier><identifier>EISSN: 1439-0388</identifier><identifier>DOI: 10.1111/j.1439-0388.2007.00711.x</identifier><identifier>PMID: 18479272</identifier><language>eng</language><publisher>Oxford, UK: Oxford, UK : Blackwell Publishing Ltd</publisher><subject>Animals ; Australia ; Body Weight - genetics ; Breeding of animals ; Correlation analysis ; fat ; genetic correlations ; Genetics ; heritability ; Linear Models ; Male ; Males ; meat colour ; Meat industry ; meat pH ; Models, Genetic ; muscle ; Sheep ; Sheep - anatomy &amp; histology ; Sheep - genetics ; Sheep - growth &amp; development ; Species Specificity ; Wool - growth &amp; development ; wool traits</subject><ispartof>Journal of animal breeding and genetics (1986), 2008-06, Vol.125 (3), p.205-215</ispartof><rights>2008 DAFWA. 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The estimates of heritability for hot carcass weight (HCW) and the various fat and muscle dimension measurements were moderate and ranged from 0.20 to 0.37. The brightness of meat (colour L*, 0.18 ± 0.03 standard error) and meat pH (0.22 ± 0.03) also had moderate estimates of heritability, although meat relative redness (colour a*, 0.10 ± 0.03) and relative yellowness (colour b*, 0.10 ± 0.03) were lower. Heritability estimates for live weights were moderate and ranged from 0.29 to 0.41 with significant permanent maternal environmental effects (0.13 to 0.10). The heritability estimates for the hogget wool traits were moderate to high and ranged from 0.27 to 0.60. The ultrasound measurements of fat depth (FATUS) and eye muscle depth (EMDUS) on live animals were highly genetically correlated with the corresponding carcass measurements (0.69 ± 0.09 FATC and 0.77 ± 0.07 EMD). Carcass tissue depth (FATGR) had moderate to low genetic correlations with carcass muscle measurements [0.18 ± 0.10 EMD and 0.05 ± 0.10 eye muscle area (EMA)], while those with FATC were negative. The genetic correlation between EMD and eye muscle width (EMW) was 0.41 ± 0.08, while EMA was highly correlated with EMD (0.89 ± 0.0) and EMW (0.78 ± 0.04). The genetic correlations for muscle colour with muscle measurements were moderately negative, while those with fat measurements were close to zero. Meat pH was positively correlated with muscle measurements (0.14 to 0.17) and negatively correlated with fat measurements (-0.06 to -0.18). EMDUS also showed a similar pattern of correlations to EMD with meat quality indicator traits, although FATUS had positive correlations with these traits which were generally smaller than their standard error. 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There was a small unfavourable genetic correlation between CFW and meat pH (0.19 ± 0.07).</description><subject>Animals</subject><subject>Australia</subject><subject>Body Weight - genetics</subject><subject>Breeding of animals</subject><subject>Correlation analysis</subject><subject>fat</subject><subject>genetic correlations</subject><subject>Genetics</subject><subject>heritability</subject><subject>Linear Models</subject><subject>Male</subject><subject>Males</subject><subject>meat colour</subject><subject>Meat industry</subject><subject>meat pH</subject><subject>Models, Genetic</subject><subject>muscle</subject><subject>Sheep</subject><subject>Sheep - anatomy &amp; histology</subject><subject>Sheep - genetics</subject><subject>Sheep - growth &amp; development</subject><subject>Species Specificity</subject><subject>Wool - growth &amp; development</subject><subject>wool traits</subject><issn>0931-2668</issn><issn>1439-0388</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkd9u0zAUxiMEYmPwCmBxwV2K_ySxI3HDBusYA4RgcGmdOietSxp3tkPbF-C5cZdqSNyAJcvW8e_7jo--LCOMTlhaL5cTVog6p0KpCadUTtJmbLK9lx3fPdzPjmktWM6rSh1lj0JYUprqsn6YHTFVyJpLfpz9mmKP0RqyBg8rjOgDaZ0nBryBEAj0DVkhRHIzQGfjjkQPNo71uEDriccOonV9WNh1INGRzv7EDdr5It5SG-c6svauGcweI7YnCzefYyQf0NvekdQ3PM4etNAFfHI4T7Lr87dfzy7yq0_Td2evr3JTqIrlgnEETkusGtGiqhmvaFHwsobC8EYqBWCYYAWVnPOiETCbNUI0sgWkyigjTrIXo2_60M2AIeqVDQa7Dnp0Q9CSSlGWqvgnyFPfopRlAp__BS7d4Ps0hOaC0kpIphKkRsh4F4LHVq-9XYHfaUb1PlG91Pvg9D44vU9U3yaqt0n69OA_zFbY_BEeIkzAqxHY2A53_22sL0-n6ZLk-Si3IeL2Tg7-h66kkKX-_nGq31x8-1xdnr_XIvHPRr4Fp2HubdDXXzhlaVZVl3WpxG_xyciD</recordid><startdate>200806</startdate><enddate>200806</enddate><creator>Greeff, J.C</creator><creator>Safari, E</creator><creator>Fogarty, N.M</creator><creator>Hopkins, D.L</creator><creator>Brien, F.D</creator><creator>Atkins, K.D</creator><creator>Mortimer, S.I</creator><creator>van der Werf, J.H.J</creator><general>Oxford, UK : Blackwell Publishing Ltd</general><general>Blackwell Publishing Ltd</general><scope>FBQ</scope><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QO</scope><scope>7TM</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope></search><sort><creationdate>200806</creationdate><title>Genetic parameters for carcass and meat quality traits and their relationships to liveweight and wool production in hogget Merino rams</title><author>Greeff, J.C ; 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development</topic><topic>wool traits</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Greeff, J.C</creatorcontrib><creatorcontrib>Safari, E</creatorcontrib><creatorcontrib>Fogarty, N.M</creatorcontrib><creatorcontrib>Hopkins, D.L</creatorcontrib><creatorcontrib>Brien, F.D</creatorcontrib><creatorcontrib>Atkins, K.D</creatorcontrib><creatorcontrib>Mortimer, S.I</creatorcontrib><creatorcontrib>van der Werf, J.H.J</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of animal breeding and genetics (1986)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Greeff, J.C</au><au>Safari, E</au><au>Fogarty, N.M</au><au>Hopkins, D.L</au><au>Brien, F.D</au><au>Atkins, K.D</au><au>Mortimer, S.I</au><au>van der Werf, J.H.J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Genetic parameters for carcass and meat quality traits and their relationships to liveweight and wool production in hogget Merino rams</atitle><jtitle>Journal of animal breeding and genetics (1986)</jtitle><addtitle>J Anim Breed Genet</addtitle><date>2008-06</date><risdate>2008</risdate><volume>125</volume><issue>3</issue><spage>205</spage><epage>215</epage><pages>205-215</pages><issn>0931-2668</issn><eissn>1439-0388</eissn><abstract>Genetic parameters for carcass and meat quality traits of about 18-month-old Merino rams (n = 5870), the progeny of 543 sires from three research resource flocks, were estimated. The estimates of heritability for hot carcass weight (HCW) and the various fat and muscle dimension measurements were moderate and ranged from 0.20 to 0.37. The brightness of meat (colour L*, 0.18 ± 0.03 standard error) and meat pH (0.22 ± 0.03) also had moderate estimates of heritability, although meat relative redness (colour a*, 0.10 ± 0.03) and relative yellowness (colour b*, 0.10 ± 0.03) were lower. Heritability estimates for live weights were moderate and ranged from 0.29 to 0.41 with significant permanent maternal environmental effects (0.13 to 0.10). The heritability estimates for the hogget wool traits were moderate to high and ranged from 0.27 to 0.60. The ultrasound measurements of fat depth (FATUS) and eye muscle depth (EMDUS) on live animals were highly genetically correlated with the corresponding carcass measurements (0.69 ± 0.09 FATC and 0.77 ± 0.07 EMD). Carcass tissue depth (FATGR) had moderate to low genetic correlations with carcass muscle measurements [0.18 ± 0.10 EMD and 0.05 ± 0.10 eye muscle area (EMA)], while those with FATC were negative. The genetic correlation between EMD and eye muscle width (EMW) was 0.41 ± 0.08, while EMA was highly correlated with EMD (0.89 ± 0.0) and EMW (0.78 ± 0.04). The genetic correlations for muscle colour with muscle measurements were moderately negative, while those with fat measurements were close to zero. Meat pH was positively correlated with muscle measurements (0.14 to 0.17) and negatively correlated with fat measurements (-0.06 to -0.18). EMDUS also showed a similar pattern of correlations to EMD with meat quality indicator traits, although FATUS had positive correlations with these traits which were generally smaller than their standard error. The genetic correlations among the meat colour traits were high and positive while those with meat pH were high and negative, which were all in the favourable direction. Generally, phenotypic correlations were similar or slightly lower than the corresponding genetic correlations. There were generally small to moderate negative genetic correlations between clean fleece weight (CFW) and carcass fat traits while those with muscle traits were close to zero. As the Merino is already a relatively lean breed, this implies that particular attention should be given to this relationship in Merino breeding programmes to prevent the reduction of fat reserves as a correlated response to selection for increased fleece weight. The ultrasound scan traits generally showed a similar pattern to the corresponding carcass fat and muscle traits. There was a small unfavourable genetic correlation between CFW and meat pH (0.19 ± 0.07).</abstract><cop>Oxford, UK</cop><pub>Oxford, UK : Blackwell Publishing Ltd</pub><pmid>18479272</pmid><doi>10.1111/j.1439-0388.2007.00711.x</doi><tpages>11</tpages></addata></record>
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subjects Animals
Australia
Body Weight - genetics
Breeding of animals
Correlation analysis
fat
genetic correlations
Genetics
heritability
Linear Models
Male
Males
meat colour
Meat industry
meat pH
Models, Genetic
muscle
Sheep
Sheep - anatomy & histology
Sheep - genetics
Sheep - growth & development
Species Specificity
Wool - growth & development
wool traits
title Genetic parameters for carcass and meat quality traits and their relationships to liveweight and wool production in hogget Merino rams
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