Estimation of genetic parameters for body weights, scrotal circumference, and testicular volume measured at different ages in Nellore cattle
dc.contributor.author | Boligon, A. A. [UNESP] | |
dc.contributor.author | Silva, J. A. V. | |
dc.contributor.author | Sesana, R. C. [UNESP] | |
dc.contributor.author | Sesana, J. C. [UNESP] | |
dc.contributor.author | Junqueira, J. B. [UNESP] | |
dc.contributor.author | Albuquerque, Lucia Galvão de [UNESP] | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Polo Excelencia Genet Bovina | |
dc.date.accessioned | 2014-05-20T13:18:24Z | |
dc.date.available | 2014-05-20T13:18:24Z | |
dc.date.issued | 2010-04-01 | |
dc.description.abstract | Data from 129,575 Nellore cattle born between 1993 and 2006, belonging to the Jacarezinho cattle-raising farm, were used to estimate genetic parameters for scrotal circumference measured at 9 (SC9), 12 (SC12), and 18 (SC18) mo of age and testicular volume measured at the same ages (TV9, TV12, and TV18) and to determine their correlation with weaning weight (WW) and yearling weight (YW), to provide information for the definition of selection criteria in beef cattle. Estimates of (co) variance components were calculated by the REML method applying an animal model in single- and multiple-trait analysis. The following heritability estimates and their respective SE were obtained for WW, YW, SC9, SC12, SC18, TV9, TV12, and TV18: 0.33 +/- 0.02, 0.37 +/- 0.03, 0.29 +/- 0.03, 0.39 +/- 0.04, 0.42 +/- 0.03, 0.19 +/- 0.04, 0.26 +/- 0.05, and 0.39 +/- 0.04, respectively. The genetic correlation between WW and YW was positive and high (0.80 +/- 0.04), indicating that these traits are mainly determined by the same genes. Genetic correlations between the growth traits and scrotal circumference measures were positive and of low to moderate magnitude, ranging from 0.23 +/- 0.04 to 0.38 +/- 0.04. on the other hand, increased genetic associations were estimated between scrotal circumference and testicular volume at different ages (0.61 +/- 0.04 to 0.86 +/- 0.04). Selection for greater scrotal circumference in males should result in greater WW, YW, and testicular volume. In conclusion, in view of the difficulty in measuring testicular volume, there is no need to change the selection criterion from scrotal circumference to testicular volume in genetic breeding programs of Zebu breeds. | en |
dc.description.affiliation | Univ Estadual Paulista, Fac Ciencias Agr & Vet, BR-14884900 São Paulo, Brazil | |
dc.description.affiliation | Polo Excelencia Genet Bovina, BR-38022330 Uberaba, MG, Brazil | |
dc.description.affiliationUnesp | Univ Estadual Paulista, Fac Ciencias Agr & Vet, BR-14884900 São Paulo, Brazil | |
dc.description.sponsorship | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
dc.format.extent | 1215-1219 | |
dc.identifier | http://dx.doi.org/10.2527/jas.2008-1719 | |
dc.identifier.citation | Journal of Animal Science. Champaign: Amer Soc Animal Science, v. 88, n. 4, p. 1215-1219, 2010. | |
dc.identifier.doi | 10.2527/jas.2008-1719 | |
dc.identifier.issn | 0021-8812 | |
dc.identifier.lattes | 5866981114947883 | |
dc.identifier.uri | http://hdl.handle.net/11449/4502 | |
dc.identifier.wos | WOS:000275898600001 | |
dc.language.iso | eng | |
dc.publisher | Amer Soc Animal Science | |
dc.relation.ispartof | Journal of Animal Science | |
dc.relation.ispartofjcr | 1.711 | |
dc.relation.ispartofsjr | 0,848 | |
dc.rights.accessRights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | Beef cattle | en |
dc.subject | Genetic correlation | en |
dc.subject | Heritability | en |
dc.title | Estimation of genetic parameters for body weights, scrotal circumference, and testicular volume measured at different ages in Nellore cattle | en |
dc.type | Resumo | |
dcterms.license | http://journalofanimalscience.org/site/misc/ifora.xhtml | |
dcterms.rightsHolder | Amer Soc Animal Science | |
unesp.author.lattes | 5866981114947883 | |
unesp.campus | Universidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal | pt |
unesp.department | Zootecnia - FCAV | pt |
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