Productive and functional traits of first-calf heifers of three genotypes by different systems of milking

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Daughters of MB bulls outperformed peers in combined milk fat and protein yield by over 31 kg during robotic milking.
The insemination index was significantly better in heifers with 50%HOL compared to 25%SIM75%HOL, indicating higher reproductive success.
The body condition of first-calf heifers showed improvements with the 50%MB25%SIM25%HOL genotype, suggesting this may lead to better overall health.
Lower culling rates were observed in the 50%MB25%SIM25%HOL genotype, emphasizing its promise for improving the Simmental breed.

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Observational analysis revealed differing lactation performance in first-calf heifers, indicating genotype impacts on milking systems.

Levina et al. (2025) studied this question.

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