Manzanilla-Pech et al.: HERITABILITIES USING 3-DIMENSIONAL CAMERAS 9008 Table 1. Cow distribution per farm (by farm identification [ID] no.) and breed, with number of records in parentheses, and total number of cows with phenotypes and genotypes per breed Farm ID Holstein Farm ID Jersey Farm ID Nordic Red 1 2 3 4 5 6 7 Total no. cows with phenotypes Total no. cows with genotypes 262 (4,220) 8 240 (1,401) 9 230 (2,887) 10 442 (9,236) 11 396 (13,096) 719 (24,396) 399 (10,396) 2,688 (65,632) 1,824 431 (22,874) 12 307 (14,308) 13 375 (11,210) 14 265 (7,189) 15 — 16 — 17 — 1,378 (55,581) 1,107 253 (10,915) 404 (7,690) 267 (3,372) 320 (6,167) 482 (7,790) 225 (1,754) — 1,951 (37,688) 1,679 length. Then, 100 points were taken from the spine of the cow, and 100 corresponding points identifying how far left and right the distance was to drop 3, 5, 10, and 15 cm from the spine. A prediction model was devel- oped using the partial least squares method based on the scale measures of the cows (Lassen and Borchersen, 2020). Subsequently, weekly averages of DMI and BW were calculated based on daily records. Data Editing The data included records of DMI and BW obtained from 3D cameras in 6,000 cows from the breeds Dan- ish Holstein, Jersey, and Nordic Red. Cow distribution per breed and parity is shown in Figure 1, whereas the number of records per lactation week, parity, and breed is shown in Supplemental Figure S1 (https:// doi.org/10.7910/DVN/KP38VY). Furthermore, cow distribution per herd and breed with the number of records, and total number of cows with genotypes per breed is presented in Table 1. In total, 2,688 Holstein, 1,378 Jersey, and 1,951 Nordic Red cows were recorded between 2019 and 2022. Only data from the first to sixth parity from the first 330 d of lactation were used. Records were set to missing for values out of the range of mean ± 3 standard deviations. On average, cows had 1.3 lactations in this data set. Pedigree and Genotypes Three sets of genotypes and pedigrees were provided by SEGES (2023), one per breed for Holstein, Jersey, Figure 1. Distributions of cows in this study, per breed (a) Holstein, (b) Jersey, and (c) Nordic Red and parity (1 to 6). Journal of Dairy Science Vol. 106 No. 12, 2023
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