Genetic variance and covariance components for carbon dioxide production and postweaning traits in Angus cattle
| Autor: | Roger Hegarty, T. Bird-Gardiner, K. A. Donoghue, P. F. Arthur, Robert M Herd |
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| Rok vydání: | 2020 |
| Předmět: |
Male
Carbon dioxide production Biology Body weight 03 medical and health sciences Animal science Angus cattle Genetic variation Genetics Animals Dry matter 030304 developmental biology 0303 health sciences Body Weight Animal Genetics and Genomics 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine Carbon Dioxide Heritability 040201 dairy & animal science Respiration chamber Phenotype Body Composition Herd Cattle Female Animal Science and Zoology Methane Food Science |
| Zdroj: | J Anim Sci |
| ISSN: | 1525-3163 0021-8812 |
| DOI: | 10.1093/jas/skaa253 |
| Popis: | This experiment investigated phenotypic and genetic relationships between carbon dioxide production, methane emission, feed intake, and postweaning traits in Angus cattle. Respiration chamber data on 1096 young bulls and heifers from 2 performance recording research herds of Angus cattle were analyzed to provide phenotypic and genetic parameters for carbon dioxide production rate (CPR; n = 425, mean 3,010 ± SD 589 g/d) and methane production rate (MPR; n = 1,096, mean 132.8 ± SD 25.2 g/d) and their relationships with dry matter intake (DMI; n = 1,096, mean 6.15 ± SD 1.33 kg/d), body weight (BW) and body composition traits. Heritability estimates were moderate to high for CPR (0.53 [SE 0.17]), MPR (0.31 [SE 0.07]), DMI (0.49 [SE 0.08]), yearling BW (0.46 [SE 0.08]), and scanned rib fat depth (0.42 [SE 0.07]). There was a strong phenotypic (0.83 [SE 0.02]) and genetic (0.75 [SE 0.10]) correlation between CPR and MPR. The correlations obtained for DMI with CPR and with MPR were high, both phenotypically (rp) and genetically (rg) (rp: 0.85 [SE 0.01] and 0.71 [SE 0.02]; rg (0.95 [SE 0.03] and 0.83 [SE 0.05], respectively). Yearling BW was strongly correlated phenotypically (rp ≥ 0.60) and genetically (rg > 0.80) with CPR, MPR, and DMI, whereas scanned rib fat was weakly correlated phenotypically (rp < 0.20) and genetically (rg ≤ 0.20) with CPR, MPR, and DMI. The strong correlation between both CPR and MPR with DMI confirms their potential use as proxies for DMI in situations where direct DMI recording is not possible such as on pasture. |
| Databáze: | OpenAIRE |
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