Plasma characteristics of beef cattle classified as resistant or susceptible to horn flies
Tarn, C.Y.
Plasma characteristics of beef cattle classified as resistant or susceptible to horn flies - 1994 - Printed
Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0021-8812
Horn flies inflict economic losses on cattle producers. Therefore, the objective of this study was to identify a serological marker for cows that are innately resistant to horn flies. Plasma characteristics (optical density, cortisol, and protein pattern) were studied in beef cattle classified (cow-type) as horn fly resistant or susceptible. Cows (n = 30) of five breed groups were used in this study. Cows were bled via jugular venipuncture in May (the beginning of the horn fly season). Plasma optical density at wavelengths 200 and 464 nm was different (P < 0.05) between resistant and susceptible cattle. Cow-type also affected (P < 0.05) area percentage for proteins with running molecular weights (Mr) of 74,000 and 54,000 daltons. Breed group affected (P < 0.05) optical density at wavelengths 200, 280, 320, and 464 nm and concentration of cortisol in plasma. When the ratio of area percentage for protein bands 7 and 9 (Mr 74,000 and 54,000, respectively) was determined, cows could be categorized as horn fly resistant or susceptible. These data suggest that a serological marker for horn fly resistant cattle has been identified; however, the marker will need to be tested on a larger population of cattle
English
0021-8812
America
Animal genetics and breeding
Animal physiology
Arthropoda
Artiodactyla
Blood
Bovidae
Bovinae
Cattle
Delta states usa
Diptera
Domestic animals
Haematobia
Insecta
Livestock
Mammals
Meat animals
Muscidae
North America
Pests of animals
Resistance to injurious factors
Ruminants
Southern states usa
USA
Useful animals
95-055131
Plasma characteristics of beef cattle classified as resistant or susceptible to horn flies - 1994 - Printed
Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0021-8812
Horn flies inflict economic losses on cattle producers. Therefore, the objective of this study was to identify a serological marker for cows that are innately resistant to horn flies. Plasma characteristics (optical density, cortisol, and protein pattern) were studied in beef cattle classified (cow-type) as horn fly resistant or susceptible. Cows (n = 30) of five breed groups were used in this study. Cows were bled via jugular venipuncture in May (the beginning of the horn fly season). Plasma optical density at wavelengths 200 and 464 nm was different (P < 0.05) between resistant and susceptible cattle. Cow-type also affected (P < 0.05) area percentage for proteins with running molecular weights (Mr) of 74,000 and 54,000 daltons. Breed group affected (P < 0.05) optical density at wavelengths 200, 280, 320, and 464 nm and concentration of cortisol in plasma. When the ratio of area percentage for protein bands 7 and 9 (Mr 74,000 and 54,000, respectively) was determined, cows could be categorized as horn fly resistant or susceptible. These data suggest that a serological marker for horn fly resistant cattle has been identified; however, the marker will need to be tested on a larger population of cattle
English
0021-8812
America
Animal genetics and breeding
Animal physiology
Arthropoda
Artiodactyla
Blood
Bovidae
Bovinae
Cattle
Delta states usa
Diptera
Domestic animals
Haematobia
Insecta
Livestock
Mammals
Meat animals
Muscidae
North America
Pests of animals
Resistance to injurious factors
Ruminants
Southern states usa
USA
Useful animals
95-055131