Genetic parameters for feed intake and body weight in dairy cattle using high throughput 3D cameras in Danish commercial farms

Recording complex phenotypes on a large scale is becoming possible with the incorporation of recently developed new technologies. One these technologies use 3D cameras commercial farms to measure feed intake and body weight (BW) daily. Residual (RFI) has been proposed as proxy for efficiency in several species, including cattle, pigs, poultry. Dry matter BW records are required calculate RFI, this technology will help increase number individual more efficiently. The aim study was estimate genetic parameters (including correlations) DMI obtained by from 6,000 cows breeds Danish Holstein, Jersey, Nordic Red. Additionally, heritabilities per parity correlations among parities were estimated 3 breeds. Data included 158k weekly between 2019 2022 17 farms. Estimated heritability ranged 0.17 0.25, whereas they 0.44 0.58. moderately positive (0.58–0.65). Genetic both traits highly correlated breeds, except first late Holstein where down 0.62. Based results, we conclude that measured heritable dairy their comparable those traditional methods (scales bins). high measurements true trait previous studies demonstrate potential measuring real-time. In conclusion, camera become valuable tool automatic continuous recording