Article (Scientific journals)
Analyses of reaction norms reveal new chromosome regions associated with tick resistance in cattle
REIS MOTA, Rodrigo; Fonseca e Silva, Fabyano; Lopes, Paulo Sávio et al.
2017In Animal
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Keywords :
beef cattle; candidate genes; environmental gradient; gene function; single-step
Abstract :
[en] Despite single nucleotide polymorphism (SNP) availability and frequent cost reduction has allowed genome-wide association studies even in complex traits as tick resistance, the use of this information source in SNP by environment interaction context is unknown for many economically important traits in cattle. We aimed at identifying putative genomic regions explaining differences in tick resistance in Hereford and Braford cattle under SNP by environment point of view as well as to identify candidate genes derived from outliers/significant markers. The environment was defined as contemporary group means of tick counts, since they seemed to be the most appropriate entities to describe the environmental gradient in beef cattle. A total of 4363 animals having tick counts (n = 10 673) originated from 197 sires and 3966 dams were used. Genotypes were acquired on 3591 of these cattle.From top 1% SNPs (410) having the greatest effects in each environment, 75 were consistently relevant in all environments, whichindicated SNP by environment interaction. The outliers/significant SNPs were mapped on chromosomes 1, 2, 5, 6, 7, 9, 11, 13, 14, 15, 16, 18, 21, 23, 24, 26 and 28, and potential candidate genes were detected across environments. The presence of SNP by environment interaction for tick resistance indicates that genetic expression of resistance depends upon tick burden. Markers with major portion of genetic variance explained across environments appeared to be close to genes with different direct or indirect functions related to immune system, inflammatory process and mechanisms of tissue destruction/repair, such as energy metabolism and cell differentiation.
Disciplines :
Animal production & animal husbandry
Author, co-author :
REIS MOTA, Rodrigo ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Ingénierie des productions animales et nutrition
Fonseca e Silva, Fabyano;  Universidade Federal de Viçosa > Animal Science
Lopes, Paulo Sávio;  Universidade Federal de Viçosa > Animal Science
Tempelman, Robert John;  Michigan State University > Animal Science
Sollero, Bruna Pena;  Embrapa South Livestock, Bagé, Brazil
Aguilar, Ignacio;  National Agricultural Research Institute, 90200 Las Brujas, Uruguay
Flores Cardoso, Fernando;  Embrapa South Livestock, Bagé, Brazil
Language :
English
Title :
Analyses of reaction norms reveal new chromosome regions associated with tick resistance in cattle
Publication date :
2017
Journal title :
Animal
ISSN :
1751-7311
eISSN :
1751-732X
Publisher :
Cambridge University Press, Cambridge, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 22 November 2017

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