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The glutamate metabotropic receptor 5(GRM5)gene is associated with beef cattle home range and movement tortuosity

Journal of Animal Science and Biotechnology 2023年第1期14卷 72-87页

作者： Cristian A.Moreno Garcia Huitong Zhou David Altimira Robyn Dynes pablo gregorini Sadeepa Jayathunga Thomas M.R.Maxwell Jonathan Hickford Department of Agricultural Sciences Faculty of Agriculture and Life SciencesLincoln UniversityPO Box 85084Lincoln 7647New Zealand. Exertion Games Lab 8 Scenic BoulevardClaytonVictoria 3800Australia. AgResearch Limited Lincoln Research CentreCnr Springs Road and Gerald StreetLincoln 7674New Zealand. Scion Tītokorangi Drive(formerly Long Mile Rd)Rotorua 3010New Zealand.

Background:The grazing behaviour of herbivores and their grazing personalities might in part be determined genetically,but there are few studies in beef cattle illustrating *** this study,we investigated for first time the genetic variation within a candidate‘grazing gene',the glutamate metabotropic receptor 5 gene(GRM5),and tested associations between variation in that gene and variation in grazing personality behaviours(GP-behaviours)displayed by free-ranging cows during winter grazing in the steep and rugged rangelands of New *** beef cows(n=303,from 3 to 10 years of age)were tracked with global positioning system(GPS)and,with 5-minutes(min)relocation frequency,various GP-behaviours were *** included horizontal and vertical distances travelled,mean elevation,elevation range,elevation gain,slope,home range and movement tortuosity,variously calculated using daily relocation trajectories with repeated measurements(i.e.,7 to 24 days(d))and satellite-derived digital elevation models(DEM).The different GP-behaviours were fitted into mixed models to ascertain their associations with variant sequences and genotypes of ***:We discovered three GRM5 variants(A,B and C)and identified the six possible genotypes in the cattle *** mixed models revealed that A was significantly associated with elevation range,home range and movement ***,GRM5 genotypes were associated(P<0.05)to home range and movement tortuosity,while trends suggesting association(P<0.1)were also revealed for elevation range and horizontal distance *** GP-behaviour models were improved by correcting for cow age-class as a fixed *** analysis of GP-behaviours averaged per cow age-class suggests that grazing personality is fully established as beef cows reached 4 years of *** range and movement tortuosity were not only associated with GRM5 variation,but also negatively correlated with each other(r=-0.27,P<0.001).Conclusions:There se

关键词： Animal personality Breeding programmes Genetic associations Grazing distribution Grazing patterns Steep and rugged terrain

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