Genetic variability of Tropical Milking Criollo cattle of Mexico estimated from genealogy information

Authors

  • Adalberto Rosendo Ponce Colegio de Postgraduados
  • Ana L. Palacios Jiménez Colegio de Postgraduados
  • Froylan Rosales Martínez Colegio de Postgraduados
  • Glafiro Torres Hernández Colegio de Postgraduados
  • Rodolfo Ramírez Valverde Chapingo Autonomous University
  • Carlos M. Becerril Pérez Colegio de Postgraduados

DOI:

https://doi.org/10.17533/udea.rccp.v31n3a04

Keywords:

cattle populations, conservation, hot climates, originating genes, pedigree analysis

Abstract

Background: Genetic variability of populations is essential for their genetic conservation and improvement, and genealogy analysis is a useful tool to estimate it. Objective: To determine genetic variability and inbreeding levels in Tropical Milking Criollo (LT). Methods: This study analyzed the genealogy of LT using the ENDOG software. Registration certificates of 3,427 LT animals born between 1945 and 2013, and from 608 born between 1950 and 2013 were used. Two populations were defined: the first one with all registered animals (PLT), and the second with nucleus animals (PCP). Results: Estimates for PLT and PCP were: founders 890, 114; ancestors 855, 102; effective founders 111, 43; effective ancestors 72, 26, and effective population size 68.1 and 64.6, respectively. Inbreeding coefficients were 4.32 and 3.48% for the highest genetic integrity index; and the average relatedness (AR) coefficients were 1.19 and 5.55 for PLT and PCP, respectively. Genealogy depth was shallow in both populations, with full equivalent generations of 2.00 and 3.53. Global generation intervals were about seven years. Conclusions: The LT population is not endangered and its genetic improvement program should continue.

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Author Biographies

Adalberto Rosendo Ponce, Colegio de Postgraduados

Ing., PhD., Colegio de Postgraduados, Veracruz Campus, Veracruz, Mexico.

Ana L. Palacios Jiménez, Colegio de Postgraduados

Ing., MC., Colegio de Postgraduados, Montecillo Campus, State of Mexico, Mexico.

Froylan Rosales Martínez, Colegio de Postgraduados

Ing, MC., Colegio de Postgraduados, Veracruz Campus, Veracruz, Mexico.

Glafiro Torres Hernández, Colegio de Postgraduados

Ing, PhD., Colegio de Postgraduados, Montecillo Campus, State of Mexico, Mexico

Rodolfo Ramírez Valverde, Chapingo Autonomous University

Ing, PhD., Chapingo Autonomous University, State of Mexico, Mexico.

Carlos M. Becerril Pérez, Colegio de Postgraduados

Ing, PhD., Colegio de Postgraduados, Veracruz Campus, Veracruz, Mexico.

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Published

2018-08-23

How to Cite

Ponce, A. R., Palacios Jiménez, A. L., Rosales Martínez, F., Torres Hernández, G., Ramírez Valverde, R., & Becerril Pérez, C. M. (2018). Genetic variability of Tropical Milking Criollo cattle of Mexico estimated from genealogy information. Revista Colombiana De Ciencias Pecuarias, 31(3), 196–203. https://doi.org/10.17533/udea.rccp.v31n3a04

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Original research articles

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