Abstract
Numerous factors may affect the resilience and sustainability of global sheep production systems, and climate change will provide new challenges in this regard. In this chapter, the author addresses phenotypic and genetic variations associated with variable climatic conditions, particularly those associated with adaptation to biotic and abiotic stressors. The first section reviews aspects of phenotypic and genetic variations associated with tolerance characteristics, e.g., coat color, tail shape, and body temperature under extreme weather events. The second section examines genomic variation associated with tolerance to climate stress using different genomic approaches. In the final section, the basic information and strategies for the genetic improvement of sheep for climate-stress-tolerance traits, e.g., genetic parameters and genomic tools, are discussed. In all sections, research examples are provided of specific adaptations to certain stresses. The information provided in this chapter should extend the understanding of the genetic architecture of climate-driven adaptation and evolution, genomics, and selective breeding. It should also encourage the application of such results for supporting sheep breeding and production to cope with the stresses resulting from expected global climate change.
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Acknowledgments
The author acknowledges the support of Prof. Max F. Rothschild, Iowa State University, the USA, for reviewing and offering helpful comments on this chapter. Financial support during the author’s stay in the USA was provided by the Fulbright Foundation, the Egyptian government, and the Ensminger endowment at Iowa State University and is gratefully appreciated.
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Elbeltagy, A.R. (2017). Sheep Genetic Diversity and Breed Differences for Climate-Change Adaptation. In: Sejian, V., Bhatta, R., Gaughan, J., Malik, P., Naqvi, S., Lal, R. (eds) Sheep Production Adapting to Climate Change. Springer, Singapore. https://doi.org/10.1007/978-981-10-4714-5_6
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