Relationship of post-weaning growth and age at puberty in crossbred beef heifers
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/166157 |
Resumo: | This study was intended to evaluate body size structure and growth parameters of crossbred heifers fed at four nutritional levels to achieve puberty earlier. Animals were classified depending on their level of crossing between Nelore and Hereford and subjected to four nutritional levels (kg day–1) as follows: 0.5 (light; n = 32), 0.75 (medium; n = 32), 1.00 (high; n = 29), and 1.25 (very high; n = 27). Heifers at puberty and at weaning were individually classified for growth parameters. The fat thickness and longissimus muscle area throughout the experimental period were determined by ultrasonography. The height, heart girth, frame, and weight:height ratio were variables used to evaluate body traits. Univariate analysis of variance using the GLIM MIXED procedure os SPSS was performed and the significance level was set at 0.05. Age and body weight at puberty were 388±1.9 days and 331.4±1.3 kg, respectively. Body condition score demonstrated an interaction between nutritional level and crossbred degree. Heifers with the highest degree of Nelore had higher fat thickness and lower weight:height ratio compared with other racial groups at puberty. Pearson correlation coefficient showed a negative association for body condition score (–0.34) and fat thickness (–0.58) compared with age at puberty. The increased fat thickness at younger ages at puberty was observed in all racial groups. The increased weight:height ratio at younger ages at puberty was observed in all racial groups. We observed higher values for a frame in animals at the higher level of supplementation. There is a greater correlation between live weight gain and phenotypic traits during weaning to achieve puberty at an earlier age in crossbred heifers. |
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Pereira, Gabriel RibasBarcellos, Julio Otavio JardimSessim, Amir GilTarouco, Jaime UrdapilletaFeijó, Fernanda DornellesBraccini Neto, JoséPrates, Enio RosaCanozzi, Maria Eugênia Andrighetto2017-09-05T02:32:44Z20171516-3598http://hdl.handle.net/10183/166157001044331This study was intended to evaluate body size structure and growth parameters of crossbred heifers fed at four nutritional levels to achieve puberty earlier. Animals were classified depending on their level of crossing between Nelore and Hereford and subjected to four nutritional levels (kg day–1) as follows: 0.5 (light; n = 32), 0.75 (medium; n = 32), 1.00 (high; n = 29), and 1.25 (very high; n = 27). Heifers at puberty and at weaning were individually classified for growth parameters. The fat thickness and longissimus muscle area throughout the experimental period were determined by ultrasonography. The height, heart girth, frame, and weight:height ratio were variables used to evaluate body traits. Univariate analysis of variance using the GLIM MIXED procedure os SPSS was performed and the significance level was set at 0.05. Age and body weight at puberty were 388±1.9 days and 331.4±1.3 kg, respectively. Body condition score demonstrated an interaction between nutritional level and crossbred degree. Heifers with the highest degree of Nelore had higher fat thickness and lower weight:height ratio compared with other racial groups at puberty. Pearson correlation coefficient showed a negative association for body condition score (–0.34) and fat thickness (–0.58) compared with age at puberty. The increased fat thickness at younger ages at puberty was observed in all racial groups. The increased weight:height ratio at younger ages at puberty was observed in all racial groups. We observed higher values for a frame in animals at the higher level of supplementation. There is a greater correlation between live weight gain and phenotypic traits during weaning to achieve puberty at an earlier age in crossbred heifers.application/pdfengRevista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 46, n.5 (maio 2017), p. 413-420DesmamaNovilhoDietaNutricao animalBeef heifersGrowth parametersNutrition dietsProductivityUltrasonographyRelationship of post-weaning growth and age at puberty in crossbred beef heifersinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL001044331.pdf001044331.pdfTexto completo (inglês)application/pdf624428http://www.lume.ufrgs.br/bitstream/10183/166157/1/001044331.pdf37c457b04ad0c0421f3c4b4eae4877c5MD51TEXT001044331.pdf.txt001044331.pdf.txtExtracted Texttext/plain40794http://www.lume.ufrgs.br/bitstream/10183/166157/2/001044331.pdf.txtb7999312c1d757c2ff6fbaeea1744d65MD52THUMBNAIL001044331.pdf.jpg001044331.pdf.jpgGenerated Thumbnailimage/jpeg2170http://www.lume.ufrgs.br/bitstream/10183/166157/3/001044331.pdf.jpg2a8c0a11fa65b624430141956c594f5cMD5310183/1661572018-10-23 09:08:31.955oai:www.lume.ufrgs.br:10183/166157Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-23T12:08:31Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Relationship of post-weaning growth and age at puberty in crossbred beef heifers |
title |
Relationship of post-weaning growth and age at puberty in crossbred beef heifers |
spellingShingle |
Relationship of post-weaning growth and age at puberty in crossbred beef heifers Pereira, Gabriel Ribas Desmama Novilho Dieta Nutricao animal Beef heifers Growth parameters Nutrition diets Productivity Ultrasonography |
title_short |
Relationship of post-weaning growth and age at puberty in crossbred beef heifers |
title_full |
Relationship of post-weaning growth and age at puberty in crossbred beef heifers |
title_fullStr |
Relationship of post-weaning growth and age at puberty in crossbred beef heifers |
title_full_unstemmed |
Relationship of post-weaning growth and age at puberty in crossbred beef heifers |
title_sort |
Relationship of post-weaning growth and age at puberty in crossbred beef heifers |
author |
Pereira, Gabriel Ribas |
author_facet |
Pereira, Gabriel Ribas Barcellos, Julio Otavio Jardim Sessim, Amir Gil Tarouco, Jaime Urdapilleta Feijó, Fernanda Dornelles Braccini Neto, José Prates, Enio Rosa Canozzi, Maria Eugênia Andrighetto |
author_role |
author |
author2 |
Barcellos, Julio Otavio Jardim Sessim, Amir Gil Tarouco, Jaime Urdapilleta Feijó, Fernanda Dornelles Braccini Neto, José Prates, Enio Rosa Canozzi, Maria Eugênia Andrighetto |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Pereira, Gabriel Ribas Barcellos, Julio Otavio Jardim Sessim, Amir Gil Tarouco, Jaime Urdapilleta Feijó, Fernanda Dornelles Braccini Neto, José Prates, Enio Rosa Canozzi, Maria Eugênia Andrighetto |
dc.subject.por.fl_str_mv |
Desmama Novilho Dieta Nutricao animal |
topic |
Desmama Novilho Dieta Nutricao animal Beef heifers Growth parameters Nutrition diets Productivity Ultrasonography |
dc.subject.eng.fl_str_mv |
Beef heifers Growth parameters Nutrition diets Productivity Ultrasonography |
description |
This study was intended to evaluate body size structure and growth parameters of crossbred heifers fed at four nutritional levels to achieve puberty earlier. Animals were classified depending on their level of crossing between Nelore and Hereford and subjected to four nutritional levels (kg day–1) as follows: 0.5 (light; n = 32), 0.75 (medium; n = 32), 1.00 (high; n = 29), and 1.25 (very high; n = 27). Heifers at puberty and at weaning were individually classified for growth parameters. The fat thickness and longissimus muscle area throughout the experimental period were determined by ultrasonography. The height, heart girth, frame, and weight:height ratio were variables used to evaluate body traits. Univariate analysis of variance using the GLIM MIXED procedure os SPSS was performed and the significance level was set at 0.05. Age and body weight at puberty were 388±1.9 days and 331.4±1.3 kg, respectively. Body condition score demonstrated an interaction between nutritional level and crossbred degree. Heifers with the highest degree of Nelore had higher fat thickness and lower weight:height ratio compared with other racial groups at puberty. Pearson correlation coefficient showed a negative association for body condition score (–0.34) and fat thickness (–0.58) compared with age at puberty. The increased fat thickness at younger ages at puberty was observed in all racial groups. The increased weight:height ratio at younger ages at puberty was observed in all racial groups. We observed higher values for a frame in animals at the higher level of supplementation. There is a greater correlation between live weight gain and phenotypic traits during weaning to achieve puberty at an earlier age in crossbred heifers. |
publishDate |
2017 |
dc.date.accessioned.fl_str_mv |
2017-09-05T02:32:44Z |
dc.date.issued.fl_str_mv |
2017 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/166157 |
dc.identifier.issn.pt_BR.fl_str_mv |
1516-3598 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001044331 |
identifier_str_mv |
1516-3598 001044331 |
url |
http://hdl.handle.net/10183/166157 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Revista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 46, n.5 (maio 2017), p. 413-420 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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