Genomic retained heterosis effects on fertility and lifetime productivity in beef heifers
| Autor: | Vern S. Baron, John A. Basarab, J. J. Crowley, Graham Plastow, Ghader Manafiazar, M. K. Abo-Ismail, E. C. Akanno |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Heterosis media_common.quotation_subject 0402 animal and dairy science Fertility 04 agricultural and veterinary sciences Biology 040201 dairy & animal science Crossbreed 03 medical and health sciences 030104 developmental biology Animal science Food Animals Beef heifer Herd Production (economics) Animal Science and Zoology Productivity media_common |
| Zdroj: | Canadian Journal of Animal Science. 98:642-655 |
| ISSN: | 1918-1825 0008-3984 |
| DOI: | 10.1139/cjas-2017-0192 |
| Popis: | This study evaluated the effects of three genomic indicators of heterosis on female fertility and lifetime productivity, and quantified changes over 11 production cycles in a crossbred cow herd. Pedigree-based breed composition (pBC) was determined and used to calculate retained heterozygosity for 412 replacement heifers born from 2004 to 2014 at the Lacombe Research and Development Centre (AB, Canada). Heifers were followed as cows over 1050 mating opportunities, 11 production cycles, and five parities. Heifers and their sires (51) were genotyped and these genotypes were used to predict each animal’s genomic breed composition (gBC) and three genomic indicators of heterosis: (1) retained heterozygosity (RHETg), (2) heterozygous proportion (H), and (3) retained heterosis (RHg). Correlations between pedigree and genomic breed fractions for Angus, Hereford, and Charolais were high (rp = 0.74–0.94; P p = 0.61 for RHETg vs. H; 0.71 for RHg vs. H; 0.96 for RHETg vs. RHg; P |
| Databáze: | OpenAIRE |
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