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Ecology and Evolution
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Ecology and Evolution
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Size does matter: Parallel evolution of adaptive thermal tolerance and body size facilitates adaptation to climate change in domestic cattle

الحجم مهم: التطور الموازي للتسامح الحراري التكيفي وحجم الجسم يسهل التكيف مع تغير المناخ في الماشية المنزلية
Authors: Muhammed Elayadeth-Meethal; Muhammed Elayadeth-Meethal; Muhammed Elayadeth-Meethal; Aravindakshan Thazhathu Veettil; Tom Misselbrook; Michael R. F. Lee; Michael R. F. Lee; +4 Authors

Size does matter: Parallel evolution of adaptive thermal tolerance and body size facilitates adaptation to climate change in domestic cattle

Abstract

AbstractThe adaptive potential of livestock under a warming climate is increasingly relevant in relation to the growing pressure of global food security. Studies on heat tolerance demonstrate the interplay of adaptation and acclimatization in functional traits, for example, a reduction in body size and enhanced tolerance in response to a warming climate. However, current lack of understanding of functional traits and phylogenetic history among phenotypically distinct populations constrains predictions of climate change impact. Here, we demonstrate evidence of parallel evolution in adaptive tolerance to heat stress in dwarf cattle breeds (DCB, Bos taurus indicus) and compare their thermoregulatory responses with those in standard size cattle breeds (SCB, crossbred, Bos taurus indicus × Bos taurus taurus). We measured vital physiological, hematological, biochemical, and gene expression changes in DCB and SCB and compared the molecular phylogeny using mitochondrial genome (mitogenome) analysis. Our results show that SCB can acclimatize in the short term to higher temperatures but reach their tolerance limit under prevailing tropical conditions, while DCB is adapted to the warmer climate. Increased hemoglobin concentration, reduced cellular size, and smaller body size enhance thermal tolerance. Mitogenome analysis revealed that different lineages of DCB have evolved reduced size independently, as a parallel adaptation to heat stress. The results illustrate mechanistic ways of dwarfing, body size‐dependent tolerance, and differential fitness in a large mammal species under harsh field conditions, providing a background for comparing similar populations during global climate change. These demonstrate the value of studies combining functional, physiological, and evolutionary approaches to delineate adaptive potential and plasticity in domestic species. We thus highlight the value of locally adapted breeds as a reservoir of genetic variation contributing to the global domestic genetic resource pool that will become increasingly important for livestock production systems under a warming climate.

Country
United Kingdom
Keywords

570, Livestock, Acclimatization, size dependence, Evolutionary biology, Phenotypic plasticity, phylogeny, phenotypic plasticity, Gene, Heat stress, Metabolic Theory of Ecology and Climate Change Impacts, heat stress, Agricultural and Biological Sciences, Thermal Tolerance, Biochemistry, Genetics and Molecular Biology, adaptive tolerance, Genetics, Climate change, Evolutionary Response, Biology, Phylogeny, Original Research, Metabolic Adaptations, Ecology, Adaptation (eye), Ectotherm, Temperature, Life Sciences, livestock, Adaptive tolerance, FOS: Biological sciences, Environmental Science, Physical Sciences, Genomic Selection in Plant and Animal Breeding, Animal Science and Zoology, Size dependence, Physiological Adaptations, Critical thermal maximum, Effects of Heat Stress on Livestock Production, Phylogenetic tree, Neuroscience

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    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    28
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
28
Top 10%
Top 10%
Top 10%
Green
gold