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Exploring the genetic control of sweat gland characteristics in beef cattle for enhanced heat tolerance

Journal of Animal science and Biotechnology 2024年第5期15卷 1820-1831页

作者： aakilah s.hernandez Gabriel A.Zayas Eduardo E.Rodriguez Kaitlyn M.sarlo Davila Fahad Rafiq Andrea N.Nunez Cristiane Goncalves Titto Raluca G.Mateescu Department of Animal science North Carolina State UniversityRaleighNCUSA Department of Animal sciences University of FloridaGainesvilleFLUSA. Ruminant Diseases and Immunology Research Unit National Animal Disease CentersUnited States Department of Agriculture1920 Dayton AvenueAmesIA 50010USA. Department of Animal science Iowa StateAmesIAUSA school of Animal sciences and Food Engineering University of Sao PauloAv Duque de Caxias Norte 225PirassunungaSao Paulo 13635‑900Brazil

Background Thermal stress in subtropical regions is a major limiting factor in beef cattle production systems with around$369 million being lost annually due to reduced *** stress causes numerous physiological and behavioral disturbances including reduced feed intake and decreased production *** utilize various physiological mechanisms such as sweating to regulate internal *** in these traits can help identify genetic variants that control sweat gland properties and subsequently allow for genetic selection of cattle with greater *** This study used 2,401 Brangus cattle from two commercial ranches in *** phenotypes that contribute to an animal's ability to manage heat stress were calculated from skin biopsies and included sweat gland area,sweat gland depth,and sweat gland *** animals were genotyped with the Bovine GGP F250K,and BLUPF90 software was used to estimate genetic parameters and for Genome Wide Association *** sweat gland phenotypes heritability ranged from 0.17 to 0.42 indicating a moderate amount of the phenotypic variation is due to genetics,allowing producers the ability to select for favorable sweat gland properties.A weighted single-step GWAs using sliding 10 kb windows identified multiple quantitative trait loci(QTLs)explaining a significant amount of genetic *** located on BTA7 and BTA12 explained over 1.0%of genetic variance and overlap the ADGRV1 and CCDC168 genes,*** variants identified in this study are implicated in processes related to immune function and cellular proliferation which could be relevant to heat *** of Origin Alleles(BOA)were predicted using local ancestry in admixed populations(LAMP-LD),allowing for identification of markers'origin from either Brahman or Angus ancestry.A BOA GWAs was performed to identify regions inherited from particular ancestral breeds that might have a significant impact on sweat gland pheno

关键词： GWAs Heritability skin Thermotolerance

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