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United States Department of Agriculture

Agricultural Research Service

Research Project: ENHANCING GENETIC MERIT OF RUMINANTS THROUGH GENOME SELECTION AND ANALYSIS

Location: Animal Genomics and Improvement Laboratory

Title: A genome-wide survey reveals a deletion polymorphism associated with resistance to gastrointestinal nematodes in Angus cattle

Authors
item Liu, Ge
item Xu, Lingyang -
item Hou, Yali -
item Bickhart, Derek
item Song, Jiuzhou -
item Van Tassell, Curtis
item Sonstegard, Tad

Submitted to: BA-UMD Symposium
Publication Type: Abstract Only
Publication Acceptance Date: September 18, 2013
Publication Date: October 18, 2013
Citation: Liu, G., Xu, L., Hou, Y., Bickhart, D.M., Song, J., Van Tassell, C.P., Sonstegard, T.S. 2013. A genome-wide survey reveals a deletion polymorphism associated with resistance to gastrointestinal nematodes in Angus cattle. BA-UMD Symposium. The University of Maryland/Beltsville ARS 3rd Annual Symposium.

Technical Abstract: Gastrointestinal (GI) nematode infections are a worldwide threat to animal health and production. In this study, we performed a genome-wide association study between copy number variations (CNV) and resistance to GI nematodes in an Angus cattle population. Using a linear regression analysis, we identified one deletion CNV which reaches genome-wide significance after Bonferroni correction. With multiple mapped human olfactory receptor genes but no annotated bovine genes in the region, this significantly associated CNV displays high population frequencies (58.26%) with a length of 104.8 kb on chr7. We further investigated the linkage disequilibrium (LD) relationships between this CNV and its nearby SNPs and genes. The underlining haplotype blocks contain immune related genes such as ZNF496 and NLRP3. As this CNV co-segregates with linked SNPs and associated genes, we suspect it could contribute to the detected variations in gene expression and thus differences in host parasite resistance.

Last Modified: 11/22/2014
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