Validation of 46 loci associated with female fertility traits in cattle
| Autor: | Mahesh Neupane, Christopher M. Seabury, Elizabeth M. Keuter, J. N. Kiser, J.C. Dalton, Holly L. Neibergs, J.G.N. Moraes, Thomas E. Spencer, Gregory W. Burns |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Linkage disequilibrium lcsh:QH426-470 Genotype lcsh:Biotechnology animal diseases medicine.medical_treatment media_common.quotation_subject Population Fertility Locus (genetics) Quantitative trait locus Biology 01 natural sciences Dairy 03 medical and health sciences lcsh:TP248.13-248.65 Conception rate Genetics medicine Animals education 030304 developmental biology media_common Estrous cycle 0303 health sciences education.field_of_study Pregnancy Models Genetic Loci Artificial insemination Reproducibility of Results medicine.disease lcsh:Genetics Genetic Loci Cattle Female Research Article Genome-Wide Association Study 010606 plant biology & botany Biotechnology |
| Zdroj: | BMC Genomics BMC Genomics, Vol 20, Iss 1, Pp 1-13 (2019) |
| ISSN: | 1471-2164 |
| Popis: | Background Subfertility is one challenge facing the dairy industry as the average Holstein heifer conception rate (HCR), the proportion of heifers that conceive and maintain a pregnancy per breeding, is estimated at 55–60%. Of the loci associated with HCR, few have been validated in an independent cattle population, limiting their usefulness for selection or furthering our understanding of the mechanisms involved in successful pregnancy. Therefore, the objectives here were to identify loci associated with HCR: 1) to the first artificial insemination (AI) service (HCR1), 2) to repeated AI services required for a heifer to conceive (TBRD) and 3) to validate loci previously associated with fertility. Breeding and health records from 3359 Holstein heifers were obtained after heifers were bred by AI at observed estrus, with pregnancy determined at day 35 via palpation. Heifer DNA was genotyped using the Illumina BovineHD BeadChip, and genome-wide association analyses (GWAA) were performed with additive, dominant and recessive models using the Efficient Mixed Model Association eXpedited (EMMAX) method with a relationship matrix for two phenotypes. The HCR1 GWAA compared heifers that were pregnant after the first AI service (n = 497) to heifers that were open following the first AI service (n = 405), which included those that never conceived. The TBRD GWAA compared only those heifers which did conceive, across variable numbers of AI service (n = 712). Comparison of loci previously associated with fertility, HCR1 or TBRD were considered the same locus for validation when in linkage disequilibrium (D’ > 0.7). Results The HCR1 GWAA identified 116, 187 and 28 loci associated (P |
| Databáze: | OpenAIRE |
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