ArticleGenetics, selection, evolution : GSE2015
Low levels of taurine introgression in the current Brazilian Nelore and Gir indicine cattle populations.
Article in Genetics, selection, evolution : GSE, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 32 citations in OpenAlex.
- Genetic diversity and population structure of Mexican Gir cattle using genome-wide SNP data.Translational animal science · 2026Article
- Identification and Validation of Genus/Species-Specific Short InDels in Dairy Ruminants.BMC veterinary research · 2025Article
- Assessing Bos taurus introgression in the UOA Bos indicus assembly.Genetics, selection, evolution : GSE · 2021Article
- The mosaic genome of indigenous African cattle as a unique genetic resource for African pastoralism.Nature genetics · 2020Article
- Selection signatures in tropical cattle are enriched for promoter and coding regions and reveal missense mutations in the damage response gene HELB.Genetics, selection, evolution : GSE · 2020Article
- A Genetic Investigation of Island Jersey Cattle, the Foundation of the Jersey Breed: Comparing Population Structure and Selection to Guernsey, Holstein, and United States Jersey Cattle.Frontiers in genetics · 2020Article
- Estimation of Genomic Breed Composition for Purebred and Crossbred Animals Using Sparsely Regularized Admixture Models.Frontiers in genetics · 2020Article
- Genome-wide assessment of genetic diversity and population structure insights into admixture and introgression in Chinese indigenous cattle.BMC genetics · 2018Article
- Assessing genetic architecture and signatures of selection of dual purpose Gir cattle populations using genomic information.PloS one · 2018Article
- A PLAG1 mutation contributed to stature recovery in modern cattle.Scientific reports · 2017Article
- Genetic diversity, population structure, and correlations between locally adapted zebu and taurine breeds in Brazil using SNP markers.Tropical animal health and production · 2017Article
- Study on the introgression of beef breeds in Canchim cattle using single nucleotide polymorphism markers.PloS one · 2017Article
- Local and global patterns of admixture and population structure in Iranian native cattle.BMC genetics · 2016Article
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Authors and funding
15 authors at 5 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundNelore and Gir are the two most important indicine cattle breeds for production of beef and milk in Brazil. Historical records state that these breeds were introduced in Brazil from the Indian subcontinent, crossed to local taurine cattle in order to quickly increase the population size, and then backcrossed to the original breeds to recover indicine adaptive and productive traits. Previous investigations based on sparse DNA markers detected taurine admixture in these breeds. High-density genome-wide analyses can provide high-resolution information on the genetic composition of current Nelore and Gir populations, estimate more precisely the levels and nature of taurine introgression, and shed light on their history and the strategies that were used to expand these breeds.
resultsWe used the high-density Illumina BovineHD BeadChip with more than 777 K single nucleotide polymorphisms (SNPs) that were reduced to 697 115 after quality control filtering to investigate the structure of Nelore and Gir populations and seven other worldwide populations for comparison. Multidimensional scaling and model-based ancestry estimation clearly separated the indicine, European taurine and African taurine ancestries. The average level of taurine introgression in the autosomal genome of Nelore and Gir breeds was less than 1% but was 9% for the Brahman breed. Analyses based on the mitochondrial SNPs present in the Illumina BovineHD BeadChip did not clearly differentiate taurine and indicine haplotype groupings.
conclusionsThe low level of taurine ancestry observed for both Nelore and Gir breeds confirms the historical records of crossbreeding and supports a strong directional selection against taurine haplotypes via backcrossing. Random sampling in production herds across the country and subsequent genotyping would be useful for a more complete view of the admixture levels in the commercial Nelore and Gir populations.
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