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Table 2 Sled dogs were 5× lower in inbreeding and 15% higher in observed heterozygosity than purebreds.

From: A genetic dissection of breed composition and performance enhancement in the Alaskan sled dog

Groupings FIS A FST B Sigma-GC AD HeE HoF
Purebred Breeds Only G 0.1085 0.2538 41.8949 2.6064 0.4729 0.4299
Purebred/Sprint/Distance H 0.1055 0.2534 42.0894 2.6100 0.4738 0.4318
All Sprint & Distance I 0.0170 0.0514 57.5737 5.6927 0.6090 0.5962
All Sprint -0.0034      
All Distance 0.0456      
Unrelated Sprint & Distance J 0.0292 0.0424 57.5158 5.3646 0.6162 0.5985
Unrelated Sprint 0.0061      
Unrelated Distance 0.0526      
8 Alaskan Sub-Populations K -0.0554 0.1349 56.2292 3.0156 0.5581 0.5849
4 Sprint Sub-Populations L -0.0729 0.1082 58.7893 3.1016 0.5749 0.6111
4 Distance Sub-Populations M -0.0361 0.1422 53.7001 2.9297 0.5413 0.5586
  1. A. FIS is the degree of inbreeding within populations (correlation of alleles within individuals within one sub-population).
  2. B. FST is the overall inbreeding coefficient (correlation of alleles of different individuals in the same population).
  3. C. Sigma-G is the variance of alleles within individuals.
  4. D. A is the mean number of alleles per locus.
  5. E. He is the expected heterozygosity of a population.
  6. F. Ho is the observed heterozygosity of a population.
  7. G. Data set included 141 purebred breed populations (681 individual dogs).
  8. H. Data set included 141 purebred breed populations and 2 Alaskan sled dog populations using the 5 most representative individuals of the sprint racing and distance racing styles (10 total Alaskan sled dogs).
  9. I. Data set included all 199 Alaskan sled dogs with microsatellite data. Relatedness not accounted for.
  10. J. Data set included 42 unrelated to the grand-parent generation Alaskan sled dog representatives of each racing style (sprint versus distance) (84 total Alaskan sled dogs).
  11. K. Data set included the 5 most representative individuals of each sub-population found within the sprint and distance racing style (40 Alaskan sled dogs).
  12. L. Data set included the 5 most representative individuals of each of the 4 sprint sub-populations (20 sprint Alaskan sled dogs).
  13. M. Data set included the 5 most representative individuals of each of the 4 distance sub-populations (20 distance Alaskan sled dogs).