Inter- and intra-genetic diversity in the Polish Konik horse: implications for the conservation program

Author:

Szwaczkowski Tomasz1,Greguła-Kania Monika2,Stachurska Anna3,Borowska Alicja4,Jaworski Zbigniew5,Gruszecki Tomasz M.2

Affiliation:

1. Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poznan, Poland.

2. Department of Small Ruminant Breeding and Agricultural Advisory, University of Life Sciences in Lublin, Lublin, Poland.

3. Department of Horse Breeding and Use, University of Life Sciences in Lublin, Lublin, Poland.

4. Division of Horse Breeding, Poznan University of Life Sciences, Poznan, Poland.

5. Department of Horse Breeding, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.

Abstract

The main objective of the study was to determine the genetic diversity in the Polish Konik (PK) population in the context of a currently conducted conservation program. A total of 94 horses of 16 PK dam lines currently distinguished by breeders were considered. Pedigree analyses were carried out for the whole population of PK registered in the studbook. Basic molecular parameters were estimated. The average group linkage clustering method was used based on the Euclidean similarity measurements between the lines. The allele frequency of 17 microsatellites was used to determine Euclidean distances. Inbreeding coefficients were extracted from the additive relationship matrix. Moreover, some pedigree parameters were estimated. The observed heterozygosity ranged from 0.48 to 0.76. The expected heterozygosity estimated for the dam lines was higher. PIC values were higher than 0.6 in all the lines. Fis ranged from –0.19 to 0.28, whereas Fit and Fst varied between 0.12 and 0.41 and 0.12 and 0.29, respectively. Minor dissimilarity distances existed for some dam lines. The inbreeding level was 9.3%. The average number of discrete generation equivalents reached 6.85. The majority of the dam lines are not genetically differentiated. Hence, a revision of the breeding strategy seems to be necessary.

Publisher

Canadian Science Publishing

Subject

Animal Science and Zoology,Food Animals

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