A - Papers appearing in refereed journals
Burrow, H. M., Mans, B. J., Cardoso, F. F., Birkett, M. A., Kotze, A. C., Hayes, B. J., Mapholi, N., Dzama, K., Marufu, M. C., Githaka, N. F. and Djikeng, A. 2019. Towards a new phenotype for tick resistance in beef and dairy cattle : a review. Animal Production Science. 59 (8), pp. 1401-1427.
|Authors||Burrow, H. M., Mans, B. J., Cardoso, F. F., Birkett, M. A., Kotze, A. C., Hayes, B. J., Mapholi, N., Dzama, K., Marufu, M. C., Githaka, N. F. and Djikeng, A.|
About 80% of the world’s cattle are affected by ticks and tick borne diseases, both of which cause signiﬁcant production losses. Cattle host resistance to ticks is the most important factor affecting the economics of tick control, but it is largely neglected in tick-control programs due to technical difﬁculties and costs associated with identifying individual animal variation in resistance. The present paper reviews the scientiﬁc literature to identify factors affecting resistance of cattle to ticks and the biological mechanisms of host tick resistance, to develop alternative phenotype(s) for tick resistance. If new cost-effective phenotype(s) can be developed and validated, then tick resistance of cattle could be genetically improved using genomic selection, and incorporated into breeding objectives to simultaneously improve cattle productive attributes and tick resistance. The phenotype(s) could also be used to improve tick control by using cattle management. On the basis of the present review, it is recommended that three possible phenotypes (haemolytic analysis; measures of skin hypersensitivity reactions; simpliﬁed artiﬁcial tick infestations) be further developed to determine their practical feasibility for consistently, cost-effectively and reliably measuring cattle tick resistance in thousands of individual animals in commercial and smallholder farmer herds in tropical and subtropical areas globally. During evaluation of these potential new phenotypes, additional measurements should be included to determine the possibility of developing a volatile-based resistance phenotype, to simultaneously improve cattle resistance to both ticks and biting ﬂies. Because the current measurements of volatile chemistry do not satisfy the requirements of a simple, cost-effective phenotype for use in commercial cattle herds, consideration should also be given to inclusion of potentially simpler measures to enable indirect genetic selection for volatile-based resistance to ticks.
|Keywords||Blood parameters; Host resistance; Immune response; Skin hypersensitivity; Tick count; Volatiles|
|Year of Publication||2019|
|Journal||Animal Production Science|
|Journal citation||59 (8), pp. 1401-1427|
|Digital Object Identifier (DOI)||doi:10.1071/AN18487|
|Open access||Published as green open access|
|Funder||Biotechnology and Biological Sciences Research Council|
|Funder project or code||Developing a New Tool for Phenotyping Tick Resistance in Cattle|
|Online||04 Jul 2019|
|Publication process dates|
|Accepted||03 Mar 2019|
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