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Preliminary report on BoLA polymorphism in Guernsey cattle
B J Nonnecke1, H A Lewin, L L Timms
1National Animal Disease Center, US Department of Agriculture, Ames, IA 50010.
Journal of Dairy Science
|December 1, 1989
Summary
This study identified 14 bovine major histocompatibility complex (BoLA) specificities in 95 Guernsey cattle. The most common BoLA specificity was w6, with subtypes w17 and UR6.2 frequently observed.
Area of Science:
- Immunogenetics
- Veterinary Science
- Livestock Genetics
Background:
- The bovine major histocompatibility complex (BoLA) plays a crucial role in immune responses.
- Understanding BoLA antigen diversity is essential for cattle breeding and disease resistance programs.
Purpose of the Study:
- To characterize the BoLA class I antigen profiles in a registered Guernsey cattle herd.
- To identify the frequency of specific BoLA alleles within this population.
Main Methods:
- Typing of 95 Guernsey cows and heifers for BoLA class I antigens.
- Utilized a panel of alloantisera to detect BoLA specificities via standard lymphocyte microcytotoxicity testing.
Main Results:
- Fourteen BoLA specificities were detected out of 33 recognized specificities.
- The most frequent BoLA specificity was w6, with subtypes w17 (13.7%) and UR6.2 (34.7%) identified in 85% of animals.
- Other common specificities included w12, w15, UR1, and w21.
Conclusions:
- The study provides a detailed profile of BoLA class I antigen frequencies in Guernsey cattle.
- This data can inform future genetic selection strategies for improved herd health and immune function.