1
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Zhang C, Zhang H, Di T, Wang G, Gao F, Li Z, Li M, Yang G. The 4 bp deletion mutation in HOXD1 gene determines the polycerate trait in Chinese Sishui fur sheep. Anim Genet 2023; 54:820-822. [PMID: 37846893 DOI: 10.1111/age.13369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 10/18/2023]
Affiliation(s)
- Cheng Zhang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, China
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
| | - Huan Zhang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, China
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
| | - Tenggang Di
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, China
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
| | - Guan Wang
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
| | - Fengyi Gao
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
| | - Zhiqiang Li
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
| | - Ming Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, China
| | - Guangli Yang
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
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2
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Wucherpfennig JI, Howes TR, Au JN, Au EH, Roberts Kingman GA, Brady SD, Herbert AL, Reimchen TE, Bell MA, Lowe CB, Dalziel AC, Kingsley DM. Evolution of stickleback spines through independent cis-regulatory changes at HOXDB. Nat Ecol Evol 2022; 6:1537-1552. [PMID: 36050398 PMCID: PMC9525239 DOI: 10.1038/s41559-022-01855-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 07/19/2022] [Indexed: 11/10/2022]
Abstract
Understanding the mechanisms leading to new traits or additional features in organisms is a fundamental goal of evolutionary biology. We show that HOXDB regulatory changes have been used repeatedly in different fish genera to alter the length and number of the prominent dorsal spines used to classify stickleback species. In Gasterosteus aculeatus (typically 'three-spine sticklebacks'), a variant HOXDB allele is genetically linked to shortening an existing spine and adding an additional spine. In Apeltes quadracus (typically 'four-spine sticklebacks'), a variant HOXDB allele is associated with lengthening a spine and adding an additional spine in natural populations. The variant alleles alter the same non-coding enhancer region in the HOXDB locus but do so by diverse mechanisms, including single-nucleotide polymorphisms, deletions and transposable element insertions. The independent regulatory changes are linked to anterior expansion or contraction of HOXDB expression. We propose that associated changes in spine lengths and numbers are partial identity transformations in a repeating skeletal series that forms major defensive structures in fish. Our findings support the long-standing hypothesis that natural Hox gene variation underlies key patterning changes in wild populations and illustrate how different mutational mechanisms affecting the same region may produce opposite gene expression changes with similar phenotypic outcomes.
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Affiliation(s)
- Julia I Wucherpfennig
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Timothy R Howes
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Jessica N Au
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Eric H Au
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, USA
| | | | - Shannon D Brady
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Amy L Herbert
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Thomas E Reimchen
- Department of Biology, University of Victoria, Victoria, British Columbia, Canada
| | - Michael A Bell
- University of California Museum of Paleontology, University of California, Berkeley, CA, USA
| | - Craig B Lowe
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, USA
| | - Anne C Dalziel
- Department of Biology, Saint Mary's University, Halifax, Nova Scotia, Canada
| | - David M Kingsley
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA, USA.
- Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA, USA.
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3
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Kalds P, Zhou S, Gao Y, Cai B, Huang S, Chen Y, Wang X. Genetics of the phenotypic evolution in sheep: a molecular look at diversity-driving genes. Genet Sel Evol 2022; 54:61. [PMID: 36085023 PMCID: PMC9463822 DOI: 10.1186/s12711-022-00753-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 08/29/2022] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND After domestication, the evolution of phenotypically-varied sheep breeds has generated rich biodiversity. This wide phenotypic variation arises as a result of hidden genomic changes that range from a single nucleotide to several thousands of nucleotides. Thus, it is of interest and significance to reveal and understand the genomic changes underlying the phenotypic variation of sheep breeds in order to drive selection towards economically important traits. REVIEW Various traits contribute to the emergence of variation in sheep phenotypic characteristics, including coat color, horns, tail, wool, ears, udder, vertebrae, among others. The genes that determine most of these phenotypic traits have been investigated, which has generated knowledge regarding the genetic determinism of several agriculturally-relevant traits in sheep. In this review, we discuss the genomic knowledge that has emerged in the past few decades regarding the phenotypic traits in sheep, and our ultimate aim is to encourage its practical application in sheep breeding. In addition, in order to expand the current understanding of the sheep genome, we shed light on research gaps that require further investigation. CONCLUSIONS Although significant research efforts have been conducted in the past few decades, several aspects of the sheep genome remain unexplored. For the full utilization of the current knowledge of the sheep genome, a wide practical application is still required in order to boost sheep productive performance and contribute to the generation of improved sheep breeds. The accumulated knowledge on the sheep genome will help advance and strengthen sheep breeding programs to face future challenges in the sector, such as climate change, global human population growth, and the increasing demand for products of animal origin.
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Affiliation(s)
- Peter Kalds
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 China
- Department of Animal and Poultry Production, Faculty of Environmental Agricultural Sciences, Arish University, El-Arish, 45511 Egypt
| | - Shiwei Zhou
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 China
- College of Veterinary Medicine, Northwest A&F University, Yangling, 712100 China
| | - Yawei Gao
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 China
| | - Bei Cai
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 China
| | - Shuhong Huang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 China
| | - Yulin Chen
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 China
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs, Yangling, 712100 China
| | - Xiaolong Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 China
- International Joint Agriculture Research Center for Animal Bio-Breeding, Ministry of Agriculture and Rural Affairs, Yangling, 712100 China
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4
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Allais-Bonnet A, Hintermann A, Deloche MC, Cornette R, Bardou P, Naval-Sanchez M, Pinton A, Haruda A, Grohs C, Zakany J, Bigi D, Medugorac I, Putelat O, Greyvenstein O, Hadfield T, Jemaa SB, Bunevski G, Menzi F, Hirter N, Paris JM, Hedges J, Palhiere I, Rupp R, Lenstra JA, Gidney L, Lesur J, Schafberg R, Stache M, Wandhammer MD, Arbogast RM, Guintard C, Blin A, Boukadiri A, Rivière J, Esquerré D, Donnadieu C, Danchin-Burge C, Reich CM, Riley DG, Marle-Koster EV, Cockett N, Hayes BJ, Drögemüller C, Kijas J, Pailhoux E, Tosser-Klopp G, Duboule D, Capitan A. Analysis of Polycerate Mutants Reveals the Evolutionary Co-option of HOXD1 for Horn Patterning in Bovidae. Mol Biol Evol 2021; 38:2260-2272. [PMID: 33528505 PMCID: PMC8136503 DOI: 10.1093/molbev/msab021] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
In the course of evolution, pecorans (i.e., higher ruminants) developed a remarkable diversity of osseous cranial appendages, collectively referred to as “headgear,” which likely share the same origin and genetic basis. However, the nature and function of the genetic determinants underlying their number and position remain elusive. Jacob and other rare populations of sheep and goats are characterized by polyceraty, the presence of more than two horns. Here, we characterize distinct POLYCERATE alleles in each species, both associated with defective HOXD1 function. We show that haploinsufficiency at this locus results in the splitting of horn bud primordia, likely following the abnormal extension of an initial morphogenetic field. These results highlight the key role played by this gene in headgear patterning and illustrate the evolutionary co-option of a gene involved in the early development of bilateria to properly fix the position and number of these distinctive organs of Bovidae.
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Affiliation(s)
- Aurélie Allais-Bonnet
- ALLICE, Paris, France.,Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France.,Ecole Nationale Vétérinaire d'Alfort, BREED, Maisons-Alfort, France
| | - Aurélie Hintermann
- Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland
| | - Marie-Christine Deloche
- ALLICE, Paris, France.,Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France.,Ecole Nationale Vétérinaire d'Alfort, BREED, Maisons-Alfort, France
| | - Raphaël Cornette
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
| | - Philippe Bardou
- GenPhySE, Université de Toulouse, INRAE, ENVT, Castanet-Tolosan, France.,INRAE, Sigenae, Castanet-Tolosan, France
| | | | - Alain Pinton
- GenPhySE, Université de Toulouse, INRAE, ENVT, Castanet-Tolosan, France
| | - Ashleigh Haruda
- Central Natural Science Collections, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Cécile Grohs
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas, France
| | - Jozsef Zakany
- Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland
| | - Daniele Bigi
- Dipartimento di Scienza e Tecnologie Agro-Alimentari, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Ivica Medugorac
- Population Genomics Group, Department of Veterinary Sciences, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Olivier Putelat
- Archéologie Alsace, Sélestat, France.,UMR 7044, ARCHIMEDE, MISHA, Strasbourg, France
| | - Ockert Greyvenstein
- Department of Animal Science, Texas A&M University, College Station, TX, USA
| | - Tracy Hadfield
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Slim Ben Jemaa
- Laboratoire des Productions Animales et Fourragères, Institut National de la Recherche Agronomique de Tunisie, Université de Carthage, Ariana, Tunisia
| | - Gjoko Bunevski
- Livestock Department, Faculty of Agricultural Sciences and Food Institute of Animal Biotechnology, University Ss. Cyril and Methodius, Skopje, North Macedonia
| | - Fiona Menzi
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Nathalie Hirter
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Julia M Paris
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - John Hedges
- Manx Loaghtan Sheep Breeders' Group, Bassingbourn, Cambridgeshire, United Kingdom
| | - Isabelle Palhiere
- GenPhySE, Université de Toulouse, INRAE, ENVT, Castanet-Tolosan, France
| | - Rachel Rupp
- GenPhySE, Université de Toulouse, INRAE, ENVT, Castanet-Tolosan, France
| | - Johannes A Lenstra
- Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Louisa Gidney
- Rent a Peasant, Tow Law, Bishop Auckland, Durham County, United Kingdom
| | - Joséphine Lesur
- Unité Archéozoologie, Archéobotanique, Sociétés Pratiques et Environnements (AASPE), CNRS, Muséum National d'Histoire Naturelle, Paris, France
| | - Renate Schafberg
- Central Natural Science Collections, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Michael Stache
- Central Natural Science Collections, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | | | | | - Claude Guintard
- Unité d'Anatomie Comparée, Ecole Nationale Vétérinaire de l'Agroalimentaire et de l'Alimentation, Nantes Atlantique-ONIRIS, Nantes, France.,Groupe d'Études Remodelage Osseux et bioMatériaux (GEROM), Université d'Angers, Unité INSERM 922, LHEA/IRIS-IBS, CHU d'Angers, Angers, France
| | - Amandine Blin
- Muséum National d'Histoire Naturelle, CNRS, UMS 2700 2AD, Paris, France
| | - Abdelhak Boukadiri
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas, France
| | - Julie Rivière
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas, France.,INRAE, Micalis Institute, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Diane Esquerré
- INRAE, US, 1426, GeT-PlaGe, Genotoul, Castanet-Tolosan, France
| | | | | | - Coralie M Reich
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
| | - David G Riley
- Department of Animal Science, Texas A&M University, College Station, TX, USA
| | | | - Noelle Cockett
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Benjamin J Hayes
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), Centre for Animal Science, University of Queensland, St. Lucia, QLD, Australia
| | - Cord Drögemüller
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - James Kijas
- CSIRO Agriculture & Food, St. Lucia, QLD, Australia
| | - Eric Pailhoux
- Université Paris-Saclay, UVSQ, INRAE, BREED, Jouy-en-Josas, France.,Ecole Nationale Vétérinaire d'Alfort, BREED, Maisons-Alfort, France
| | | | - Denis Duboule
- Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland.,Swiss Cancer Research Institute, EPFL, Lausanne, Switzerland.,Collège de France, Paris, France
| | - Aurélien Capitan
- ALLICE, Paris, France.,Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas, France
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5
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Gebreselassie G, Berihulay H, Jiang L, Ma Y. Review on Genomic Regions and Candidate Genes Associated with Economically Important Production and Reproduction Traits in Sheep ( Ovies aries). Animals (Basel) 2019; 10:E33. [PMID: 31877963 PMCID: PMC7022721 DOI: 10.3390/ani10010033] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 11/24/2019] [Accepted: 12/20/2019] [Indexed: 12/15/2022] Open
Abstract
Sheep (Ovis aries) is one of the most economically, culturally, and socially important domestic animals. They are reared primarily for meat, milk, wool, and fur production. Sheep were reared using natural selection for a long period of time to offer these traits. In fact, this production system has been slowing the productivity and production potential of the sheep. To improve production efficiency and productivity of this animal through genetic improvement technologies, understanding the genetic background of traits such as body growth, weight, carcass quality, fat percent, fertility, milk yield, wool quality, horn type, and coat color is essential. With the development and utilization of animal genotyping technologies and gene identification methods, many functional genes and genetic variants associated with economically important phenotypic traits have been identified and annotated. This is useful and presented an opportunity to increase the pace of animal genetic gain. Quantitative trait loci and genome wide association study have been playing an important role in identifying candidate genes and animal characterization. This review provides comprehensive information on the identified genomic regions and candidate genes associated with production and reproduction traits, and gene function in sheep.
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Affiliation(s)
- Gebremedhin Gebreselassie
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; (G.G.); (H.B.); (L.J.)
- National Germplasm Center of Domestic Animal Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China
- Department of Agricultural Biotechnology, Biotechnology Center, Ethiopian Biotechnology Institute, Ministry of Innovation and Technology, Addis Ababa 1000, Ethiopia
| | - Haile Berihulay
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; (G.G.); (H.B.); (L.J.)
- National Germplasm Center of Domestic Animal Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China
| | - Lin Jiang
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; (G.G.); (H.B.); (L.J.)
- National Germplasm Center of Domestic Animal Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China
| | - Yuehui Ma
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; (G.G.); (H.B.); (L.J.)
- National Germplasm Center of Domestic Animal Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China
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6
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Gascoigne E, Williams DL, Reyher KK. Survey of prevalence and investigation of predictors and staining patterns of the split upper eyelid defect in Hebridean sheep. Vet Rec 2017; 181:vetrec-2016-104082. [PMID: 28780532 DOI: 10.1136/vr.104082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 04/30/2017] [Accepted: 05/10/2017] [Indexed: 11/04/2022]
Abstract
The split upper eyelid defect (SUED) is a congenital defect of the upper eyelid thought to be exclusive to multihorned sheep. Eleven flocks with a high proportion of multihorned Hebridean sheep were visited in 2011. Statistical analysis was performed generating Pearson's chi-squared analysis, as well as (1) logistic regression, (2) ordinal logistic regression and (3) linear regression models. Four hundred and seventy-three pure-bred Hebridean sheep and one crossbred lamb were examined. Of all the multihorned animals inspected in 2011, 9.7 per cent of adults had evidence of SUED in one or more eyelids, with 17.6 per cent of lambs presented with one or more eyelid affected. Having five or more horns was protective in the linear regression model on eye-level data (p=0.045). Forward-facing horns were consistently associated with a 'worst' eye score in the eye-level data, with an odds ratio (OR) as high as 9.4 when compared with a base of backward-facing horns (p=0.002). Eyes positive for SUED were significantly more likely to be rose bengal stain-positive in all four analysis, including multilevel mixed effect ordered logistic regression (p<0.001, OR 149.3). A novel lesion was identified during the course of the study, with 3.4 per cent of lambs presented with dermoid. SUED was also identified in a crossbred animal. Further work is needed to quantify the exact cost to animals with unilateral or bilateral SUED with subtle and production cost of SUED.
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Affiliation(s)
| | - David L Williams
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Kristen K Reyher
- School of Veterinary Sciences, University of Bristol, Bristol, UK
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7
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Lee AM, Fletcher NF, Rowan C, Jahns AH. Occipital condylar dysplasia in a Jacob lamb ( Ovis aries). Open Vet J 2017; 7:126-131. [PMID: 28652978 PMCID: PMC5471745 DOI: 10.4314/ovj.v7i2.8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 05/08/2017] [Indexed: 11/25/2022] Open
Abstract
Jacob sheep (Ovis aries) are a pedigree breed known for their “polycerate” (multihorned) phenotype. We describe a four-horned Jacob lamb that exhibited progressive congenital hindlimb ataxia and paresis, and was euthanased four weeks post-partum. Necropsy and CT-scan revealed deformity and asymmetry of the occipital condyles, causing narrowing of the foramen magnum and spinal cord compression. Histopathology demonstrated Wallerian degeneration of the cervical spinal cord at the level of the foramen magnum. These findings are consistent with occipital condylar dysplasia. This condition has been infrequently reported in the literature as a suspected heritable disease of polycerate Jacob sheep in the USA, and is assumed to arise during selection for the polycerate trait. This is the first reported case in European-bred Jacob sheep. Occipital condylar dysplasia should be considered as a differential diagnosis in polycerate Jacob lambs showing ataxia. It is important to raise awareness of this disease due to its suspected heritability and link to the popular polycerate trait.
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Affiliation(s)
- Alison M Lee
- School of Veterinary Medicine, Veterinary Science Centre, University College Dublin, Belfield, Dublin 4, Ireland
| | - Nicola F Fletcher
- School of Veterinary Medicine, Veterinary Science Centre, University College Dublin, Belfield, Dublin 4, Ireland
| | - Conor Rowan
- School of Veterinary Medicine, Veterinary Science Centre, University College Dublin, Belfield, Dublin 4, Ireland
| | - And Hanne Jahns
- School of Veterinary Medicine, Veterinary Science Centre, University College Dublin, Belfield, Dublin 4, Ireland
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8
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He X, Zhou Z, Pu Y, Chen X, Ma Y, Jiang L. Mapping the four-horned locus and testing the polled locus in three Chinese sheep breeds. Anim Genet 2016; 47:623-7. [PMID: 27427781 DOI: 10.1111/age.12464] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2016] [Indexed: 01/06/2023]
Abstract
Four-horned sheep are an ideal animal model for illuminating the genetic basis of horn development. The objective of this study was to locate the genetic region responsible for the four-horned phenotype and to verify a previously reported polled locus in three Chinese breeds. A genome-wide association study (GWAS) was performed using 34 two-horned and 32 four-horned sheep from three Chinese indigenous breeds: Altay, Mongolian and Sishui Fur sheep. The top two significant single nucleotide polymorphisms (SNPs) associated with the four-horned phenotype were both located in a region spanning positions 132.6 to 132.7 Mb on sheep chromosome 2. Similar locations for the four-horned trait were previously identified in Jacob, Navajo-Churro, Damara and Sishui Fur sheep, suggesting a common genetic component underlying the four-horned phenotype. The two identified SNPs were both downstream of the metaxin 2 (MTX2) gene and the HOXD gene cluster. For the top SNP-OAR2:g.132619300G>A-the strong associations of the AA and AG genotypes with the four-horned phenotype and the GG genotype with the two-horned phenotype indicated the dominant inheritance of the four-horned trait. No significant SNPs for the polled phenotype were identified in the GWAS analysis, and a PCR analysis for the detection of the 1.8-kb insertion associated with polled sheep in other breeds failed to verify the association with polledness in the three Chinese breeds. This study supports the hypothesis that two different loci are responsible for horn existence and number. This study contributes to the understanding of the molecular regulation of horn development and enriches the knowledge of qualitative traits in domestic animals.
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Affiliation(s)
- Xiaohong He
- Key Laboratory for Farm Animal Genetic Resources and Utilization of the Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China.,CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - Zhengkui Zhou
- Key Laboratory for Farm Animal Genetic Resources and Utilization of the Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - Yabin Pu
- Key Laboratory for Farm Animal Genetic Resources and Utilization of the Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China.,CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - Xiaofei Chen
- Key Laboratory for Farm Animal Genetic Resources and Utilization of the Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China.,CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - Yuehui Ma
- Key Laboratory for Farm Animal Genetic Resources and Utilization of the Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China. .,CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China.
| | - Lin Jiang
- Key Laboratory for Farm Animal Genetic Resources and Utilization of the Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China. .,CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China.
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