Structure and genetic diversity of Brazilian Zebu cattle breeds assessed by pedigree analysis

Autor: M.L. Santana, Gilberto Romeiro de Oliveira Menezes, Annaiza Braga Bignardi, C. H. C. Machado, D. R. Ayres, L.A. Josahkian, Grégoire Leroy, L. O. C. Silva, Rodrigo Junqueira Pereira, Lucia Galvão de Albuquerque
Přispěvatelé: Grupo de Melhoramento Animal de Mato Grosso (GMAT), Instituto de Ciências Agrárias e Tecnológicas, Universidade Federal de Mato Grosso do Sul (UFMS), Brazilian Agricultural Research Corporation (Embrapa), Génétique Animale et Biologie Intégrative (GABI), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Associação Brasileira dos Criadores de Zebu, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista Júlio de Mesquita Filho [São José do Rio Preto] (UNESP), Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), AgroParisTech, INRA, Assoc Brasileira Criadores Zebu, Universidade Estadual Paulista (Unesp), Universidade Estadual Paulista Júlio de Mesquita Filho = São Paulo State University (UNESP)
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Livestock Science
Livestock Science, Elsevier, 2016, 187, pp.6-15. ⟨10.1016/j.livsci.2016.02.002⟩
Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 1871-1413
DOI: 10.1016/j.livsci.2016.02.002⟩
Popis: Made available in DSpace on 2018-11-27T14:33:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-05-01 Fundacao de Amparo a Pesquisa do Estado de Mato Grosso (FAPEMAT) The monitoring of population structure, inbreeding and other related parameters has great potential to prevent major losses of genetic diversity in populations of Zebu cattle in Brazil. Therefore, the objective of the present study was to investigate the structure and genetic diversity of Brazilian Zebu cattle breeds by pedigree analysis. The national pedigree file of the seven Brazilian Zebu breeds was used, which included all registered animals (12,290,243) born between 1938 and 2012: Brahman, Gir, Guzera, Indubrasil, Nelore, Sindi, and Tabapua. Almost all breeds studied undergo expansion in their census which, however, is not accompanied by the maintenance of genetic diversity. Problems were encountered in all breeds, but most of them can currently be considered less important. Using the calculation method considered as the most accurate for pedigree analysis when some population substructure exists, all breeds, except Sindi, had effective population size greater than 100. The most common problems were the presence of tight bottlenecks in the pedigree, which were mainly due to the intensive use of few animals as parents and the high degree of population subdivision. The use of a wider range of sires is therefore recommended. However, most Zebu breeds can deal with breeding programs using high selection intensities. Greater care should be taken in the case of the Indubrasil breed since its census was reduced drastically over the last few years, a fact favoring the occurrence of serious problems related to inbreeding. Although Sindi presents problems due to subdivision and possesses a relatively small census compared to other Zebu breeds, this population would have a promising future if its breeding policy were revised. (C) 2016 Elsevier B.V. All rights reserved. Univ Fed Mato Grosso, Inst Ciencias Agr & Tecnol, Grp Melhoramento Anim Mato Grosso GMAT, Campus Univ Rondonopolis,MT 270,Km 06, BR-78735901 Rondonopolis, MT, Brazil Embrapa Gado Corte, BR-79106550 Campo Grande, MS, Brazil AgroParisTech, Genet Anim & Biol Integrat UMR1313, 16 Rue Claude Bernard, F-75321 Paris 05, France INRA, Genet Anim & Biol Integrat UMR1313, F-78352 Jouy En Josas, France Assoc Brasileira Criadores Zebu, BR-38022330 Uberaba, MG, Brazil Univ Estadual Paulista, Fac Ciencias Agr & Vet, BR-14884900 Jaboticabal, SP, Brazil Univ Estadual Paulista, Fac Ciencias Agr & Vet, BR-14884900 Jaboticabal, SP, Brazil Fundacao de Amparo a Pesquisa do Estado de Mato Grosso (FAPEMAT): 321353/2012
Databáze: OpenAIRE
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