FIELD: animal breeding.
SUBSTANCE: invention relates to animal breeding and can be used in selection of highly productive cows. Animals are ranked annually in a herd of first-calf cows in the second month of lactation using a selection index which takes into account the range of variability of udder volume, udder volume decay and intensity of milk flow. Higher the selection index (measured in points from 0 to 100), the higher the rank of the first-calf cow by the level of milk production. After ranking among first-calf cows, animals with the highest selection index are selected in order to replace the most low-productive cows rejected from the dairy herd.
EFFECT: use of the invention will make it possible to increase efficiency of selection of first-calf cows successfully combining high milk yield with adaptability to machine milking.
1 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
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RU2645248C1 |
| GENETIC-MATHEMATICAL METHOD FOR EVALUATING SELECTION PROCESS IN DAIRY CATTLE BREEDING | 1991 |
|
RU2092046C1 |
| METHOD FOR SELECTION OF DAIRY COWS FOR DAIRY COMPLEXES | 1991 |
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| METHOD OF SELECTING HIGH-PRODUCTIVE COWS | 2016 |
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| METHOD FOR PREDICTING MILK PRODUCTIVITY OF COWS | 2023 |
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| METHOD FOR SELECTING COWS FOR MILKING ON A ROBOTIC UNIT | 2021 |
|
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| METHOD FOR ASSESSING STRESS RESISTANCE AND SELECTION OF TECHNOLOGICAL-TYPE COWS FOR ROBOTIC MILKING | 2022 |
|
RU2789493C2 |
| METHOD FOR EVALUATION AND SELECTION OF COWS FOR MACHINE MILKING BY UDDER QUALITY | 2022 |
|
RU2789491C2 |
| COW SELECTION METHOD FOR ROBOTIC MILKING | 2020 |
|
RU2723181C1 |
