Modeling the effect of age at calving × breed group of dam's interaction on weaning weight of Charolais-Zebu crossbred calves
The objective of this study was to evaluate alternatives for modeling the interaction between age of dam at calving (AOD) and the dam genetic group (DGG) on the weaning weight (W225) of Charolais-Zebu (Ch-Z) crossbred calves. Data from 56,965 crossbred calves were analyzed by the least square method...
Gespeichert in:
| Veröffentlicht in: | Revista brasileira de zootecnia 2010, Vol.39 (5) |
|---|---|
| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | 5 |
| container_start_page | |
| container_title | Revista brasileira de zootecnia |
| container_volume | 39 |
| creator | Toral, Fábio Luiz Buranelo(Universidade Federal de Minas Gerais) Torres Júnior, Roberto Augusto de Almeida(Embrapa Gado de Corte) Lopes, Paulo Sávio(Universidade Federal de Viçosa) Silva, Luiz Otávio Campos da(Embrapa Gado de Corte) Reis Filho, João Cruz(Ministério da Agricultura, Pecuária e Abastecimento) |
| description | The objective of this study was to evaluate alternatives for modeling the interaction between age of dam at calving (AOD) and the dam genetic group (DGG) on the weaning weight (W225) of Charolais-Zebu (Ch-Z) crossbred calves. Data from 56,965 crossbred calves were analyzed by the least square method. Regression coefficients for age of dam at calving were estimated nested into each class of the dam genetic group (CLA model); for age of dam at calving × dam Charolais percentage (age of dam at calving × FCh) and age of dam at calving × dam heterozygosity (age of dam at calving × FH) (FChFH model); for age of dam at calving × dam Charolais percentage (FCh model); for age of dam at calving × FH (FH model); or only for age of dam at calving (NINT model). Segmented polynomials were used to model the general shape of the age of dam at calving effect and its interaction with dam genetic group. The knots were at 6.33 and 10.66 years of age of dam at calving and general linear and quadratic coefficient regression and specific quadratic coefficient regression after each knot were fitted. The regression coefficients were estimated nested within sex of the calf in all situations. According to the F test for sum of squared residuals differences, the inclusion of the age of dam at calving × FH interaction did not improve the fit of the model and the CLA model provided the best fit. However, the estimates of the age of dam at calving and dam genetic group interaction from the CLA model for dam genetic group × sex of the calf classes with few records were not appropriate, but the estimates of the age of dam at calving and dam genetic group interaction from the FCh model for those classes were appropriate. The differences were small in the estimates of the age of dam of calving and dam genetic group interaction from the CLA or FCh models for dam genetic group × sex of the calf classes with many records.
Este trabalho foi realizado com o objetivo de avaliar alternativas para modelar a interação entre idade ao parto e grupo genético da vaca (GGV) sobre o peso à desmama de bezerros mestiços Charolês-Zebu. Dados de peso à desmama de 56.965 bezerros Charolês-Zebu foram analisados utilizando o método de quadrados mínimos. Foram estimados coeficientes de regressão para idade da vaca ao parto (IVP) dentro de cada grupo genético da vaca (modelo CLA); para IVP × fração esperada de alelos de origem da raça Charolesa na vaca (IVP × FCh) e IVP × fração esperada dos loci da vaca com um al |
| format | Article |
| fullrecord | <record><control><sourceid>fao</sourceid><recordid>TN_cdi_fao_agris_XS2010U00135</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>XS2010U00135</sourcerecordid><originalsourceid>FETCH-fao_agris_XS2010U001353</originalsourceid><addsrcrecordid>eNqFjEFrwkAUhJdSQav-BOFBwZ4CbxOiBo9S6aUnWxAv8kzeblbSrOxb672_vIn0XhiYgZn5HtRIr3CRFGmBj13O9SLJ8mI1VE8iZ8R0mRU4Uj_vvuLGtRZizcDGcBnBGyDLQBFKar77cv6c6nwNp8BcgQ3-eulHFX29CLg2cqAyOt9CpxtT219u7Gx9Z21qCr4hJ8mBT1cogxfpSNWdzjJRA0ON8PTPx2q2ff3YvCWG_JFscHLc71LU-Imoszz7r_8Fs-NK_A</addsrcrecordid><sourcetype>Publisher</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Modeling the effect of age at calving &#215; breed group of dam's interaction on weaning weight of Charolais-Zebu crossbred calves</title><source>DOAJ Directory of Open Access Journals</source><source>EZB-FREE-00999 freely available EZB journals</source><creator>Toral, Fábio Luiz Buranelo(Universidade Federal de Minas Gerais) ; Torres Júnior, Roberto Augusto de Almeida(Embrapa Gado de Corte) ; Lopes, Paulo Sávio(Universidade Federal de Viçosa) ; Silva, Luiz Otávio Campos da(Embrapa Gado de Corte) ; Reis Filho, João Cruz(Ministério da Agricultura, Pecuária e Abastecimento)</creator><creatorcontrib>Toral, Fábio Luiz Buranelo(Universidade Federal de Minas Gerais) ; Torres Júnior, Roberto Augusto de Almeida(Embrapa Gado de Corte) ; Lopes, Paulo Sávio(Universidade Federal de Viçosa) ; Silva, Luiz Otávio Campos da(Embrapa Gado de Corte) ; Reis Filho, João Cruz(Ministério da Agricultura, Pecuária e Abastecimento)</creatorcontrib><description>The objective of this study was to evaluate alternatives for modeling the interaction between age of dam at calving (AOD) and the dam genetic group (DGG) on the weaning weight (W225) of Charolais-Zebu (Ch-Z) crossbred calves. Data from 56,965 crossbred calves were analyzed by the least square method. Regression coefficients for age of dam at calving were estimated nested into each class of the dam genetic group (CLA model); for age of dam at calving × dam Charolais percentage (age of dam at calving × FCh) and age of dam at calving × dam heterozygosity (age of dam at calving × FH) (FChFH model); for age of dam at calving × dam Charolais percentage (FCh model); for age of dam at calving × FH (FH model); or only for age of dam at calving (NINT model). Segmented polynomials were used to model the general shape of the age of dam at calving effect and its interaction with dam genetic group. The knots were at 6.33 and 10.66 years of age of dam at calving and general linear and quadratic coefficient regression and specific quadratic coefficient regression after each knot were fitted. The regression coefficients were estimated nested within sex of the calf in all situations. According to the F test for sum of squared residuals differences, the inclusion of the age of dam at calving × FH interaction did not improve the fit of the model and the CLA model provided the best fit. However, the estimates of the age of dam at calving and dam genetic group interaction from the CLA model for dam genetic group × sex of the calf classes with few records were not appropriate, but the estimates of the age of dam at calving and dam genetic group interaction from the FCh model for those classes were appropriate. The differences were small in the estimates of the age of dam of calving and dam genetic group interaction from the CLA or FCh models for dam genetic group × sex of the calf classes with many records.
Este trabalho foi realizado com o objetivo de avaliar alternativas para modelar a interação entre idade ao parto e grupo genético da vaca (GGV) sobre o peso à desmama de bezerros mestiços Charolês-Zebu. Dados de peso à desmama de 56.965 bezerros Charolês-Zebu foram analisados utilizando o método de quadrados mínimos. Foram estimados coeficientes de regressão para idade da vaca ao parto (IVP) dentro de cada grupo genético da vaca (modelo CLA); para IVP × fração esperada de alelos de origem da raça Charolesa na vaca (IVP × FCh) e IVP × fração esperada dos loci da vaca com um alelo proveniente da raça Charolesa e outro proveniente de raças zebuínas (IVP × FH) (modelo FChFH); para IVP × FCh (modelo FCh); para IVP × FH (modelo FH); ou apenas para IVP (modelo SINT). A forma geral do efeito da IVP sobre o peso à desmama foi modelada por polinômios segmentados com efeitos linear e quadrático gerais e quadráticos específicos, a partir de cada nó (6,33 e 10,66 anos). Os coeficientes de regressão foram estimados dentro de cada sexo do bezerro em todas as situações. De acordo com o teste F para redução da soma de quadrados do resíduo, a inclusão da interação IVP × FH não melhorou significativamente os ajustes e o modelo CLA foi o que melhor se ajustou aos dados. Contudo, para classes de GGV × sexo do bezerro com reduzido número de observações, o modelo CLA proporcionou estimativas inconsistentes para o efeito da interação IVP × GGV e o modelo FCh mostrou-se adequado. Para as classes de GGV × sexo do bezerro com grande número de observações, as diferenças entre as estimativas do efeito da interação IVP × GGV obtidas pelos modelos CLA e FCh foram de pequena magnitude.</description><identifier>ISSN: 1516-3598</identifier><identifier>EISSN: 1806-9290</identifier><language>eng</language><publisher>Sociedade Brasileira de Zootecnia</publisher><subject>avaliação genética multirracial ; crossbreeding ; cruzamento ; heterozigose ; heterozygosis ; least square ; multiple-breed genetic evaluation ; quadrados mínimos</subject><ispartof>Revista brasileira de zootecnia, 2010, Vol.39 (5)</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>314,780,784,4024</link.rule.ids></links><search><creatorcontrib>Toral, Fábio Luiz Buranelo(Universidade Federal de Minas Gerais)</creatorcontrib><creatorcontrib>Torres Júnior, Roberto Augusto de Almeida(Embrapa Gado de Corte)</creatorcontrib><creatorcontrib>Lopes, Paulo Sávio(Universidade Federal de Viçosa)</creatorcontrib><creatorcontrib>Silva, Luiz Otávio Campos da(Embrapa Gado de Corte)</creatorcontrib><creatorcontrib>Reis Filho, João Cruz(Ministério da Agricultura, Pecuária e Abastecimento)</creatorcontrib><title>Modeling the effect of age at calving &#215; breed group of dam's interaction on weaning weight of Charolais-Zebu crossbred calves</title><title>Revista brasileira de zootecnia</title><description>The objective of this study was to evaluate alternatives for modeling the interaction between age of dam at calving (AOD) and the dam genetic group (DGG) on the weaning weight (W225) of Charolais-Zebu (Ch-Z) crossbred calves. Data from 56,965 crossbred calves were analyzed by the least square method. Regression coefficients for age of dam at calving were estimated nested into each class of the dam genetic group (CLA model); for age of dam at calving × dam Charolais percentage (age of dam at calving × FCh) and age of dam at calving × dam heterozygosity (age of dam at calving × FH) (FChFH model); for age of dam at calving × dam Charolais percentage (FCh model); for age of dam at calving × FH (FH model); or only for age of dam at calving (NINT model). Segmented polynomials were used to model the general shape of the age of dam at calving effect and its interaction with dam genetic group. The knots were at 6.33 and 10.66 years of age of dam at calving and general linear and quadratic coefficient regression and specific quadratic coefficient regression after each knot were fitted. The regression coefficients were estimated nested within sex of the calf in all situations. According to the F test for sum of squared residuals differences, the inclusion of the age of dam at calving × FH interaction did not improve the fit of the model and the CLA model provided the best fit. However, the estimates of the age of dam at calving and dam genetic group interaction from the CLA model for dam genetic group × sex of the calf classes with few records were not appropriate, but the estimates of the age of dam at calving and dam genetic group interaction from the FCh model for those classes were appropriate. The differences were small in the estimates of the age of dam of calving and dam genetic group interaction from the CLA or FCh models for dam genetic group × sex of the calf classes with many records.
Este trabalho foi realizado com o objetivo de avaliar alternativas para modelar a interação entre idade ao parto e grupo genético da vaca (GGV) sobre o peso à desmama de bezerros mestiços Charolês-Zebu. Dados de peso à desmama de 56.965 bezerros Charolês-Zebu foram analisados utilizando o método de quadrados mínimos. Foram estimados coeficientes de regressão para idade da vaca ao parto (IVP) dentro de cada grupo genético da vaca (modelo CLA); para IVP × fração esperada de alelos de origem da raça Charolesa na vaca (IVP × FCh) e IVP × fração esperada dos loci da vaca com um alelo proveniente da raça Charolesa e outro proveniente de raças zebuínas (IVP × FH) (modelo FChFH); para IVP × FCh (modelo FCh); para IVP × FH (modelo FH); ou apenas para IVP (modelo SINT). A forma geral do efeito da IVP sobre o peso à desmama foi modelada por polinômios segmentados com efeitos linear e quadrático gerais e quadráticos específicos, a partir de cada nó (6,33 e 10,66 anos). Os coeficientes de regressão foram estimados dentro de cada sexo do bezerro em todas as situações. De acordo com o teste F para redução da soma de quadrados do resíduo, a inclusão da interação IVP × FH não melhorou significativamente os ajustes e o modelo CLA foi o que melhor se ajustou aos dados. Contudo, para classes de GGV × sexo do bezerro com reduzido número de observações, o modelo CLA proporcionou estimativas inconsistentes para o efeito da interação IVP × GGV e o modelo FCh mostrou-se adequado. Para as classes de GGV × sexo do bezerro com grande número de observações, as diferenças entre as estimativas do efeito da interação IVP × GGV obtidas pelos modelos CLA e FCh foram de pequena magnitude.</description><subject>avaliação genética multirracial</subject><subject>crossbreeding</subject><subject>cruzamento</subject><subject>heterozigose</subject><subject>heterozygosis</subject><subject>least square</subject><subject>multiple-breed genetic evaluation</subject><subject>quadrados mínimos</subject><issn>1516-3598</issn><issn>1806-9290</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqFjEFrwkAUhJdSQav-BOFBwZ4CbxOiBo9S6aUnWxAv8kzeblbSrOxb672_vIn0XhiYgZn5HtRIr3CRFGmBj13O9SLJ8mI1VE8iZ8R0mRU4Uj_vvuLGtRZizcDGcBnBGyDLQBFKar77cv6c6nwNp8BcgQ3-eulHFX29CLg2cqAyOt9CpxtT219u7Gx9Z21qCr4hJ8mBT1cogxfpSNWdzjJRA0ON8PTPx2q2ff3YvCWG_JFscHLc71LU-Imoszz7r_8Fs-NK_A</recordid><startdate>2010</startdate><enddate>2010</enddate><creator>Toral, Fábio Luiz Buranelo(Universidade Federal de Minas Gerais)</creator><creator>Torres Júnior, Roberto Augusto de Almeida(Embrapa Gado de Corte)</creator><creator>Lopes, Paulo Sávio(Universidade Federal de Viçosa)</creator><creator>Silva, Luiz Otávio Campos da(Embrapa Gado de Corte)</creator><creator>Reis Filho, João Cruz(Ministério da Agricultura, Pecuária e Abastecimento)</creator><general>Sociedade Brasileira de Zootecnia</general><scope>FBQ</scope></search><sort><creationdate>2010</creationdate><title>Modeling the effect of age at calving &#215; breed group of dam's interaction on weaning weight of Charolais-Zebu crossbred calves</title><author>Toral, Fábio Luiz Buranelo(Universidade Federal de Minas Gerais) ; Torres Júnior, Roberto Augusto de Almeida(Embrapa Gado de Corte) ; Lopes, Paulo Sávio(Universidade Federal de Viçosa) ; Silva, Luiz Otávio Campos da(Embrapa Gado de Corte) ; Reis Filho, João Cruz(Ministério da Agricultura, Pecuária e Abastecimento)</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-fao_agris_XS2010U001353</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>avaliação genética multirracial</topic><topic>crossbreeding</topic><topic>cruzamento</topic><topic>heterozigose</topic><topic>heterozygosis</topic><topic>least square</topic><topic>multiple-breed genetic evaluation</topic><topic>quadrados mínimos</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Toral, Fábio Luiz Buranelo(Universidade Federal de Minas Gerais)</creatorcontrib><creatorcontrib>Torres Júnior, Roberto Augusto de Almeida(Embrapa Gado de Corte)</creatorcontrib><creatorcontrib>Lopes, Paulo Sávio(Universidade Federal de Viçosa)</creatorcontrib><creatorcontrib>Silva, Luiz Otávio Campos da(Embrapa Gado de Corte)</creatorcontrib><creatorcontrib>Reis Filho, João Cruz(Ministério da Agricultura, Pecuária e Abastecimento)</creatorcontrib><collection>AGRIS</collection><jtitle>Revista brasileira de zootecnia</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Toral, Fábio Luiz Buranelo(Universidade Federal de Minas Gerais)</au><au>Torres Júnior, Roberto Augusto de Almeida(Embrapa Gado de Corte)</au><au>Lopes, Paulo Sávio(Universidade Federal de Viçosa)</au><au>Silva, Luiz Otávio Campos da(Embrapa Gado de Corte)</au><au>Reis Filho, João Cruz(Ministério da Agricultura, Pecuária e Abastecimento)</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Modeling the effect of age at calving &#215; breed group of dam's interaction on weaning weight of Charolais-Zebu crossbred calves</atitle><jtitle>Revista brasileira de zootecnia</jtitle><date>2010</date><risdate>2010</risdate><volume>39</volume><issue>5</issue><issn>1516-3598</issn><eissn>1806-9290</eissn><abstract>The objective of this study was to evaluate alternatives for modeling the interaction between age of dam at calving (AOD) and the dam genetic group (DGG) on the weaning weight (W225) of Charolais-Zebu (Ch-Z) crossbred calves. Data from 56,965 crossbred calves were analyzed by the least square method. Regression coefficients for age of dam at calving were estimated nested into each class of the dam genetic group (CLA model); for age of dam at calving × dam Charolais percentage (age of dam at calving × FCh) and age of dam at calving × dam heterozygosity (age of dam at calving × FH) (FChFH model); for age of dam at calving × dam Charolais percentage (FCh model); for age of dam at calving × FH (FH model); or only for age of dam at calving (NINT model). Segmented polynomials were used to model the general shape of the age of dam at calving effect and its interaction with dam genetic group. The knots were at 6.33 and 10.66 years of age of dam at calving and general linear and quadratic coefficient regression and specific quadratic coefficient regression after each knot were fitted. The regression coefficients were estimated nested within sex of the calf in all situations. According to the F test for sum of squared residuals differences, the inclusion of the age of dam at calving × FH interaction did not improve the fit of the model and the CLA model provided the best fit. However, the estimates of the age of dam at calving and dam genetic group interaction from the CLA model for dam genetic group × sex of the calf classes with few records were not appropriate, but the estimates of the age of dam at calving and dam genetic group interaction from the FCh model for those classes were appropriate. The differences were small in the estimates of the age of dam of calving and dam genetic group interaction from the CLA or FCh models for dam genetic group × sex of the calf classes with many records.
Este trabalho foi realizado com o objetivo de avaliar alternativas para modelar a interação entre idade ao parto e grupo genético da vaca (GGV) sobre o peso à desmama de bezerros mestiços Charolês-Zebu. Dados de peso à desmama de 56.965 bezerros Charolês-Zebu foram analisados utilizando o método de quadrados mínimos. Foram estimados coeficientes de regressão para idade da vaca ao parto (IVP) dentro de cada grupo genético da vaca (modelo CLA); para IVP × fração esperada de alelos de origem da raça Charolesa na vaca (IVP × FCh) e IVP × fração esperada dos loci da vaca com um alelo proveniente da raça Charolesa e outro proveniente de raças zebuínas (IVP × FH) (modelo FChFH); para IVP × FCh (modelo FCh); para IVP × FH (modelo FH); ou apenas para IVP (modelo SINT). A forma geral do efeito da IVP sobre o peso à desmama foi modelada por polinômios segmentados com efeitos linear e quadrático gerais e quadráticos específicos, a partir de cada nó (6,33 e 10,66 anos). Os coeficientes de regressão foram estimados dentro de cada sexo do bezerro em todas as situações. De acordo com o teste F para redução da soma de quadrados do resíduo, a inclusão da interação IVP × FH não melhorou significativamente os ajustes e o modelo CLA foi o que melhor se ajustou aos dados. Contudo, para classes de GGV × sexo do bezerro com reduzido número de observações, o modelo CLA proporcionou estimativas inconsistentes para o efeito da interação IVP × GGV e o modelo FCh mostrou-se adequado. Para as classes de GGV × sexo do bezerro com grande número de observações, as diferenças entre as estimativas do efeito da interação IVP × GGV obtidas pelos modelos CLA e FCh foram de pequena magnitude.</abstract><pub>Sociedade Brasileira de Zootecnia</pub></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1516-3598 |
| ispartof | Revista brasileira de zootecnia, 2010, Vol.39 (5) |
| issn | 1516-3598 1806-9290 |
| language | eng |
| recordid | cdi_fao_agris_XS2010U00135 |
| source | DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | avaliação genética multirracial crossbreeding cruzamento heterozigose heterozygosis least square multiple-breed genetic evaluation quadrados mínimos |
| title | Modeling the effect of age at calving × breed group of dam's interaction on weaning weight of Charolais-Zebu crossbred calves |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-27T12%3A27%3A14IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-fao&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Modeling%20the%20effect%20of%20age%20at%20calving%20&%23215;%20breed%20group%20of%20dam's%20interaction%20on%20weaning%20weight%20of%20Charolais-Zebu%20crossbred%20calves&rft.jtitle=Revista%20brasileira%20de%20zootecnia&rft.au=Toral,%20F%C3%A1bio%20Luiz%20Buranelo(Universidade%20Federal%20de%20Minas%20Gerais)&rft.date=2010&rft.volume=39&rft.issue=5&rft.issn=1516-3598&rft.eissn=1806-9290&rft_id=info:doi/&rft_dat=%3Cfao%3EXS2010U00135%3C/fao%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |