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Genetic diversity and population structure of the Charolais breed in Ecuador through pedigree

Abstract:

SUMMARY The evaluation of genetic diversity and gene flow through genealogical information of a population is necessary in genetic selection programs. Therefore, the objective of the study was to evaluate the diversity and genetic structure of the Charolais population in Ecuador. Three sets of data were used, the historical population, current population and the reference population. The information on each animal included its own name and registration number, that of the father, the mother, and date of birth. The parameters evaluated were the completeness of the pedigree, generation interval, inbre-eding, mean relationship, increase in inbreeding and effective population size. For data processing, the ENDOG program was used. The completeness of the pedigree decreased considerably from the second generation in both populations, although the first generation showed values of 0.617 and 0.745. The average generation interval was 7.17 years for the historical population and 8.42 years for the current one. The father pathway was superior to the maternal pathway in both populations. Inbreeding values were 0.08% and 0.14%, respectively. The Ne was 537.38. The Charolais cattle breed in Ecuador is in the process of being established, and can be considered a young population from the genetic point of view. The use of reproductive biotechnologies with molecular information has directly influenced the quality of the genealogical information added to the control in the records of new animals, which will allow the association to have reliable tools for population management.