Table 1.
The populations included in the study, with cattle breed, number of animals sampled, and the estimated number of existing animals per breed at present
| Cattle breed | Number sampled | Estimated number in existence | Country |
|---|---|---|---|
| Jutland cattle | 386 | 895 (2016)a | Denmark |
| Kortegaard‐lineage (Jutland) | 131 | ||
| Oregaard‐lineage (Jutland) | 186 | ||
| Vesterbølle‐lineage (Jutland) | 20 | ||
| Westergaard‐lineage (Jutland) | 16 | ||
| Old bulls pre‐1980b | 15 | ||
| Old bulls post‐1980c (n = 14 Jutland) | 18 | ||
| SDM‐1965 | 20 | 212 (2015)d | Denmark |
| Western Norwegian Fjord cattle | 21 | 692 (2015)e | Norway |
| Western Norwegian Red‐polled cattle | 19 | 139 (2015)e | Norway |
| Faroe cattle | 8 | Circa 40f | Faroe Islands |
| Holstein | 9 | 904,045 (2016)g | Denmarkg |
| Jersey | 9 | 142,179 (2016)h | Denmarkh |
Where relevant, we have noted where a lineage or subsampled population belongs to the Jutland cattle by adding this name in parentheses. For Jutland cattle lineages Kortegaard and Oregaard, we subsampled n = 20 individuals from each group to equalize sample sizes among groups (details in Materials and Methods).
DAD‐IS (2017a). Numbers within the various Danish Jutland cattle lineages were not available.
Old bulls pre‐1980 are cryopreserved semen samples of SDM‐1965 included to evaluate temporal changes in genetic diversity and structure.
Old bulls post‐1980 are cryopreserved semen samples of n = 14 Danish Jutland cattle (one sampled in duplicate) and n = 4 SDM‐1965.
DAD‐IS (2017b).
Sæther and Rehnberg (2016).
Li et al. (2005). Additionally, DAD‐IS (2017c) reports >1,240 individuals in 1992. One individual sampled in duplicate.
DAD‐IS (2017d). This report refers to Danish Holstein and thus the Danish population of this international breed originating from The Netherlands.
DAD‐IS (2017e). This report refers to Danish Jersey and thus the Danish population of this international breed originating from the island of Jersey in the United Kingdom.