Genetic trends of absolute and relative heart weight in a male broiler line
Data of chickens from a broiler-breeding program have been collected and used for determination of genetic trends of absolute and relative heart weight. The genetic trends have been estimated by regression of the genetic values of the traits over hatch-year. Genetic values of 42,912 individuals, obt...
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| Veröffentlicht in: | Genetics and molecular research 2007-01, Vol.6 (4), p.1091-1096 |
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| creator | Gaya, L.G Costa, A.M.M.A Ferraz, J.B.S Rezende, F.M Mattos, E.C Eler, J.P Michelan Filho, T Mourão, G.B Figueiredo, L.G.G |
| description | Data of chickens from a broiler-breeding program have been collected and used for determination of genetic trends of absolute and relative heart weight. The genetic trends have been estimated by regression of the genetic values of the traits over hatch-year. Genetic values of 42,912 individuals, obtained by restricted maximum likelihood, were used for regression analysis. The estimates of the genetic trends for absolute and relative heart weight were found to be -0.08 g and -0.004% per hatch-year, respectively. These trends show that heart weight in the line analyzed, in absolute and relative terms, has tended to decrease, which can make the metabolic disorders due to the reduction in heart weight in broilers even worse. |
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The genetic trends have been estimated by regression of the genetic values of the traits over hatch-year. Genetic values of 42,912 individuals, obtained by restricted maximum likelihood, were used for regression analysis. The estimates of the genetic trends for absolute and relative heart weight were found to be -0.08 g and -0.004% per hatch-year, respectively. These trends show that heart weight in the line analyzed, in absolute and relative terms, has tended to decrease, which can make the metabolic disorders due to the reduction in heart weight in broilers even worse.</description><identifier>ISSN: 1676-5680</identifier><identifier>EISSN: 1676-5680</identifier><identifier>PMID: 18273802</identifier><language>eng</language><publisher>Brazil</publisher><subject>animal breeding ; Animals ; Brazil ; Breeding ; broiler chickens ; Chickens - anatomy & histology ; Chickens - genetics ; Chickens - metabolism ; Female ; genetic trend ; heart ; Heart - anatomy & histology ; Likelihood Functions ; Male ; Organ Size - genetics ; Poultry Diseases - genetics ; Poultry Diseases - metabolism ; Poultry Diseases - pathology ; Regression Analysis ; Time Factors ; tissue weight</subject><ispartof>Genetics and molecular research, 2007-01, Vol.6 (4), p.1091-1096</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,778,782</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18273802$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Gaya, L.G</creatorcontrib><creatorcontrib>Costa, A.M.M.A</creatorcontrib><creatorcontrib>Ferraz, J.B.S</creatorcontrib><creatorcontrib>Rezende, F.M</creatorcontrib><creatorcontrib>Mattos, E.C</creatorcontrib><creatorcontrib>Eler, J.P</creatorcontrib><creatorcontrib>Michelan Filho, T</creatorcontrib><creatorcontrib>Mourão, G.B</creatorcontrib><creatorcontrib>Figueiredo, L.G.G</creatorcontrib><title>Genetic trends of absolute and relative heart weight in a male broiler line</title><title>Genetics and molecular research</title><addtitle>Genet Mol Res</addtitle><description>Data of chickens from a broiler-breeding program have been collected and used for determination of genetic trends of absolute and relative heart weight. The genetic trends have been estimated by regression of the genetic values of the traits over hatch-year. Genetic values of 42,912 individuals, obtained by restricted maximum likelihood, were used for regression analysis. The estimates of the genetic trends for absolute and relative heart weight were found to be -0.08 g and -0.004% per hatch-year, respectively. These trends show that heart weight in the line analyzed, in absolute and relative terms, has tended to decrease, which can make the metabolic disorders due to the reduction in heart weight in broilers even worse.</description><subject>animal breeding</subject><subject>Animals</subject><subject>Brazil</subject><subject>Breeding</subject><subject>broiler chickens</subject><subject>Chickens - anatomy & histology</subject><subject>Chickens - genetics</subject><subject>Chickens - metabolism</subject><subject>Female</subject><subject>genetic trend</subject><subject>heart</subject><subject>Heart - anatomy & histology</subject><subject>Likelihood Functions</subject><subject>Male</subject><subject>Organ Size - genetics</subject><subject>Poultry Diseases - genetics</subject><subject>Poultry Diseases - metabolism</subject><subject>Poultry Diseases - pathology</subject><subject>Regression Analysis</subject><subject>Time Factors</subject><subject>tissue weight</subject><issn>1676-5680</issn><issn>1676-5680</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqF0L1OwzAUBWALgWgpvAJ4Yot0bSf-GVEFBVGJATpHbnLdGjlJsR0Qb0-lFomN6Z7hO2e4J2TKpJJFJTWc_skTcpHSOwCvSg3nZMI0V0IDn5LnBfaYfUNzxL5NdHDUrtMQxozU9i2NGGz2n0i3aGOmX-g320x9Ty3tbEC6joMPGGnwPV6SM2dDwqvjnZHVw_3b_LFYviye5nfLwnFZ5kJp4QAay6RomZRaKJRMW9NUsiw1gwZaYxgXJTiNqpX7klCNYcgdc65iYkZuD7u7OHyMmHLd-dRgCLbHYUy1AsYAyupfyBkHU2mzh9dHOK47bOtd9J2N3_Xvn_bg5gCcHWq7iT7Vq1cOTABorcEY8QPHrWwP</recordid><startdate>20070101</startdate><enddate>20070101</enddate><creator>Gaya, L.G</creator><creator>Costa, A.M.M.A</creator><creator>Ferraz, J.B.S</creator><creator>Rezende, F.M</creator><creator>Mattos, E.C</creator><creator>Eler, J.P</creator><creator>Michelan Filho, T</creator><creator>Mourão, G.B</creator><creator>Figueiredo, L.G.G</creator><scope>FBQ</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope></search><sort><creationdate>20070101</creationdate><title>Genetic trends of absolute and relative heart weight in a male broiler line</title><author>Gaya, L.G ; 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The genetic trends have been estimated by regression of the genetic values of the traits over hatch-year. Genetic values of 42,912 individuals, obtained by restricted maximum likelihood, were used for regression analysis. The estimates of the genetic trends for absolute and relative heart weight were found to be -0.08 g and -0.004% per hatch-year, respectively. These trends show that heart weight in the line analyzed, in absolute and relative terms, has tended to decrease, which can make the metabolic disorders due to the reduction in heart weight in broilers even worse.</abstract><cop>Brazil</cop><pmid>18273802</pmid><tpages>6</tpages></addata></record> |
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| subjects | animal breeding Animals Brazil Breeding broiler chickens Chickens - anatomy & histology Chickens - genetics Chickens - metabolism Female genetic trend heart Heart - anatomy & histology Likelihood Functions Male Organ Size - genetics Poultry Diseases - genetics Poultry Diseases - metabolism Poultry Diseases - pathology Regression Analysis Time Factors tissue weight |
| title | Genetic trends of absolute and relative heart weight in a male broiler line |
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