Population structure of the Brazilian Crioula Lageana cattle (Bos taurus) breed

  • Tomaz Pezzini University of Brasilia; Ministry of Agriculture, Livestock and Supply
  • Arthur S. Mariante Embrapa Genetic Resources and Biotechnology
  • Edison Martins Crioula Lageana Breeders Association
  • Samuel Paiva University of Brasilia, Embrapa Genetic Resources and Biotechnology
  • Luiza Seixas University of Brasilia
  • João B. G. Costa Jr University of Brasilia, Associated Faculties of Uberaba
  • Jivago Rolo University of Brasilia
  • Concepta McManus University of Brasilia
Keywords: conservation of animal genetic resources, genetic diversity, inbreeding, locally-adapted breed, pedigree analysis

Abstract

Background: The lack of information on population structure is one of the main obstacles to develop breeding and conservation programs for animal genetic resources. Objective: To characterize the population structure of Crioula Lageana cattle breed (Bos taurus) in order to assess its genetic diversity. Methods: Database with information of 1,638 Crioula Lageana animals, collected during 38 years, was analysed using the ENDOG v.4.4 program. Results: Effective population size ranged from 72.53 in complete generations to 143.90 in maximum generations. Inbreeding and Average Relatedness coefficients were 0.34 and 0.91%, respectively. The effective number of founders and ancestors were 29 and 28 animals, respectively, and only ten ancestors were responsible for 50% of the genetic variability of the whole population. The average generation interval was 5.84 years in the paternal line and 7.70 in the maternal one. Wright´s F statistics indicated low genetic distances between subsets in relation to the total population (Fst = 0.0015), between individuals with respect to their subpopulation (Fis = -0.0027), and between individuals in relation to the total population (Fit = -0.0012). Conclusion: Analysis of the population indicated that, despite the small number of animals with known parentage and considerable loss of genetic variability by the constant use of a few sires, and same value of number of founders and ancestors, the population showed good genetic management, low inbreeding, low genetic differentiation among subpopulations, and probably adequate effective population size for breed preservation.

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Author Biographies

Tomaz Pezzini, University of Brasilia; Ministry of Agriculture, Livestock and Supply

VM, PhD., Postgraduate Program in Animal Sciences, University of Brasilia, Brazil. Ministry of Agriculture, Livestock and Supply, Brazil.

Arthur S. Mariante, Embrapa Genetic Resources and Biotechnology

AG, PhD., Embrapa Genetic Resources and Biotechnology, Brazil.

Edison Martins, Crioula Lageana Breeders Association

VM, PhD., Crioula Lageana Breeders Association, Brazil.

Samuel Paiva, University of Brasilia, Embrapa Genetic Resources and Biotechnology

Biol, MSc, PhD., Postgraduate Program in Animal Sciences, University of Brasilia, Brazil. Embrapa Genetic Resources and Biotechnology, Brazil.

Luiza Seixas, University of Brasilia

VM, MSc, PhD., Postgraduate Program in Animal Sciences, University of Brasília, Brazil.

João B. G. Costa Jr, University of Brasilia, Associated Faculties of Uberaba

AS, PhD., Postgraduate Program in Animal Sciences, University of Brasília, Brazil. Associated Faculties of Uberaba, Brazil.

Jivago Rolo, University of Brasilia

VM, PhD., Institute of Biological Sciences, University of Brasilia, Brazil.

Concepta McManus, University of Brasilia

AS, MSc, PhD., Postgraduate Program in Animal Sciences, University of Brasilia, Brazil. Institute of Biological Sciences, University of Brasilia, Brazil.

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Published
2018-06-20
How to Cite
Pezzini T., Mariante A. S., Martins E., Paiva S., Seixas L., G. Costa Jr J. B., Rolo J., & McManus C. (2018). Population structure of the Brazilian Crioula Lageana cattle (Bos taurus) breed. Revista Colombiana De Ciencias Pecuarias, 31(2), 93-102. https://doi.org/10.17533/udea.rccp.v31n2a02
Section
Original research articles