OMIA 001823-9913 : Abortion due to haplotype HH2 in Bos taurus

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal Recessive Lethal

Considered a defect: yes

Key variant known: no

Key variant is published: no

Species-specific name: Haplotype HH2

Species-specific symbol: Hh2

Mapping: Using genotype data from tens of thousands of North American Holsteins, Jerseys and Brown Swiss cattle each genotyped with approximately 50K SNPs on the BovineSNP50 BeadChip, VanRaden et al. (2011) identified five new recessive lethal haplotypes by searching for common haplotypes that are never homozygous in live animals. Three of these haplotypes occur in Holsteins only, and (following a convention proposed by breed-association staff) VanRaden et al. (2011) named them HH1, HH2 and HH3, where the first H stands for Holstein and the second H for haplotype. The disorder described in this OMIA entry is HH2, which is located in chromosome BTA1, at 92-97Mb (UMD 3.0 genome assembly).

McClure et al. (2014) refined the mapping of haplotype HH2 on chromosome BTA1 to 94,860,836 to 96,553,339 (UMD3.1).

Molecular basis: In an extensive study involving exome capture and next-gen sequencing, McClure et al. (2014) were not able to discover any potentially causal variant for haplotype HH2.

Breed: Holstein.


Note: the references are listed in reverse chronological order (from the most recent year to the earliest year), and alphabetically by first author within a year.
2016 Cole, J.B., Null, D.J., VanRaden, P.M. :
Phenotypic and genetic effects of recessive haplotypes on yield, longevity, and fertility. J Dairy Sci 99:7274-88, 2016. Pubmed reference: 27394947. DOI: 10.3168/jds.2015-10777.
Segelke, D., Täubert, H., Reinhardt, F., Thaller, G. :
Considering genetic characteristics in German Holstein breeding programs. J Dairy Sci 99:458-67, 2016. Pubmed reference: 26601581. DOI: 10.3168/jds.2015-9764.
2014 McClure, M.C., Bickhart, D., Null, D., Vanraden, P., Xu, L., Wiggans, G., Liu, G., Schroeder, S., Glasscock, J., Armstrong, J., Cole, J.B., Van Tassell, C.P., Sonstegard, T.S. :
Bovine exome sequence analysis and targeted SNP genotyping of recessive fertility defects BH1, HH2, and HH3 reveal a putative causative mutation in SMC2 for HH3. PLoS One 9:e92769, 2014. Pubmed reference: 24667746. DOI: 10.1371/journal.pone.0092769.
2011 VanRaden, P.M., Olson, K.M., Null, D.J., Hutchison, J.L. :
Harmful recessive effects on fertility detected by absence of homozygous haplotypes. J Dairy Sci 94:6153-61, 2011. Pubmed reference: 22118103. DOI: 10.3168/jds.2011-4624.

Edit History

  • Created by Frank Nicholas on 12 Jun 2013
  • Changed by Frank Nicholas on 12 Jun 2013
  • Changed by Frank Nicholas on 01 Apr 2014
  • Changed by Frank Nicholas on 24 Mar 2015