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- W4317928360 abstract "The purpose of the study was the influence of Ayrshire bulls on economically useful signs of daughters, which were carried out according to a sample of 1,446 first-calving cows from 58 bulls. On average, the cows in the sample were calved at the age of 27,3±0,1 months. With a live weight of 487±0,4 kg and milked for lactation 6409±33.4 kg of milk .The one-way analysis of variance (ANOVA) method the strength of the influence of breeding bulls was calculated, which strongly influenced the growth and development of proband in different periods of ontogenesis: height at withers (58,0 %), live weight at birth, at 10, 12, 18 months (from 49,0 to 51,9 %) and on the level of productivity of daughters (41,6 %), which is quite high. A high correlation between the live weight of heifers at birth, at 10, 12, 18 months with the height at the withers of cows after the first calving was revealed (+0,555; +0,487; +0,487; +0,509) and with milk yield for the first lactation (+0,591; +0,522; +0,550; +0,584), as well as the height at the withers with milk yield (+0,457). Therefore, the productivity of cows after the 1st lactation depends on their development in heifers. It was found that the descendants of breeding bulls who exceeded the average sample values for milk yield also had a large live weight at 10 and 12 months and height at the withers." @default.
- W4317928360 created "2023-01-25" @default.
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- W4317928360 date "2022-01-01" @default.
- W4317928360 modified "2023-09-27" @default.
- W4317928360 title "Influence of Ayrshire bulls on economically useful signs of daughters" @default.
- W4317928360 doi "https://doi.org/10.36871/vet.zoo.bio.202212113" @default.
- W4317928360 hasPublicationYear "2022" @default.
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