Genetic relationships between weight loss in early lactation and daily milk production throughout lactation in Holstein cows
ABSTRACT: After calving, high-yielding dairy cows mobilize body reserves for energy, sometimes to the detriment of health and fertility. This study aimed to estimate the genetic correlation between body weight loss until nadir and daily milk production (MY24) in first- (L1) and second-lactation (L2)...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Journal of Dairy Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0022030223002175 |
| _version_ | 1797802329850773504 |
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| author | T. Tribout S. Minéry R. Vallée S. Saille D. Saunier P. Martin V. Ducrocq P. Faverdin D. Boichard |
| author_facet | T. Tribout S. Minéry R. Vallée S. Saille D. Saunier P. Martin V. Ducrocq P. Faverdin D. Boichard |
| author_sort | T. Tribout |
| collection | DOAJ |
| description | ABSTRACT: After calving, high-yielding dairy cows mobilize body reserves for energy, sometimes to the detriment of health and fertility. This study aimed to estimate the genetic correlation between body weight loss until nadir and daily milk production (MY24) in first- (L1) and second-lactation (L2) Holstein cows. The data set included 859,020 MY24 records and 570,651 daily raw body weight (BWr) phenotypes from 3,989 L1 cows, and 665,361 MY24 records and 449,449 BWr phenotypes from 3,060 L2 cows, recorded on 36 French commercial farms equipped with milking robots that included an automatic weighing platform. To avoid any bias due to change in digestive content, BWr was adjusted for variations in feed intake, estimated from milk production and BWr. Adjusted body weight was denoted BW. The genetic parameters of BW and MY24 in L1 and L2 cows were estimated using a 4-trait random regression model. In this model, the random effects were fitted by second-order Legendre polynomials on a weekly basis from wk 1 to 44. Nadir of BW was found to be earlier than reported in the literature, at 29 d in milk, and BW loss from calving to nadir was also lower than generally assumed, close to 29 kg. To estimate genetic correlations between body weight loss and production, we defined BWL5 as the loss of weight between wk 1 and 5 after calving. Genetic correlations between BWL5 and MY24 ranged from −0.26 to 0.05 in L1 and from −0.11 to 0.10 in L2, according to days in milk. These moderate to low values suggest that it may be possible to select for milk production without increasing early body mobilization. |
| first_indexed | 2024-03-13T05:04:03Z |
| format | Article |
| id | doaj.art-b26a2a3c9e2147d58d9523edda15f7b9 |
| institution | Directory Open Access Journal |
| issn | 0022-0302 |
| language | English |
| last_indexed | 2024-03-13T05:04:03Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Dairy Science |
| spelling | doaj.art-b26a2a3c9e2147d58d9523edda15f7b92023-06-17T05:17:05ZengElsevierJournal of Dairy Science0022-03022023-07-01106747994812Genetic relationships between weight loss in early lactation and daily milk production throughout lactation in Holstein cowsT. Tribout0S. Minéry1R. Vallée2S. Saille3D. Saunier4P. Martin5V. Ducrocq6P. Faverdin7D. Boichard8Université Paris Saclay, INRAE, AgroParisTech, GABI, 78350 Jouy-en-Josas, France; Corresponding authorInstitut de l'Elevage, 75012 Paris, FranceInstitut de l'Elevage, 75012 Paris, FranceINNOVAL, CS 10040, 35538 Noyal sur Vilaine, FranceEliance, 75012 Paris, FranceUniversité Paris Saclay, INRAE, AgroParisTech, GABI, 78350 Jouy-en-Josas, FranceUniversité Paris Saclay, INRAE, AgroParisTech, GABI, 78350 Jouy-en-Josas, FranceINRAE, AgroCampus Ouest, PEGASE, 35590 Saint-Gilles, FranceUniversité Paris Saclay, INRAE, AgroParisTech, GABI, 78350 Jouy-en-Josas, FranceABSTRACT: After calving, high-yielding dairy cows mobilize body reserves for energy, sometimes to the detriment of health and fertility. This study aimed to estimate the genetic correlation between body weight loss until nadir and daily milk production (MY24) in first- (L1) and second-lactation (L2) Holstein cows. The data set included 859,020 MY24 records and 570,651 daily raw body weight (BWr) phenotypes from 3,989 L1 cows, and 665,361 MY24 records and 449,449 BWr phenotypes from 3,060 L2 cows, recorded on 36 French commercial farms equipped with milking robots that included an automatic weighing platform. To avoid any bias due to change in digestive content, BWr was adjusted for variations in feed intake, estimated from milk production and BWr. Adjusted body weight was denoted BW. The genetic parameters of BW and MY24 in L1 and L2 cows were estimated using a 4-trait random regression model. In this model, the random effects were fitted by second-order Legendre polynomials on a weekly basis from wk 1 to 44. Nadir of BW was found to be earlier than reported in the literature, at 29 d in milk, and BW loss from calving to nadir was also lower than generally assumed, close to 29 kg. To estimate genetic correlations between body weight loss and production, we defined BWL5 as the loss of weight between wk 1 and 5 after calving. Genetic correlations between BWL5 and MY24 ranged from −0.26 to 0.05 in L1 and from −0.11 to 0.10 in L2, according to days in milk. These moderate to low values suggest that it may be possible to select for milk production without increasing early body mobilization.http://www.sciencedirect.com/science/article/pii/S0022030223002175genetic parameterstest-day modelbody weight lossmilking robotdairy cows |
| spellingShingle | T. Tribout S. Minéry R. Vallée S. Saille D. Saunier P. Martin V. Ducrocq P. Faverdin D. Boichard Genetic relationships between weight loss in early lactation and daily milk production throughout lactation in Holstein cows Journal of Dairy Science genetic parameters test-day model body weight loss milking robot dairy cows |
| title | Genetic relationships between weight loss in early lactation and daily milk production throughout lactation in Holstein cows |
| title_full | Genetic relationships between weight loss in early lactation and daily milk production throughout lactation in Holstein cows |
| title_fullStr | Genetic relationships between weight loss in early lactation and daily milk production throughout lactation in Holstein cows |
| title_full_unstemmed | Genetic relationships between weight loss in early lactation and daily milk production throughout lactation in Holstein cows |
| title_short | Genetic relationships between weight loss in early lactation and daily milk production throughout lactation in Holstein cows |
| title_sort | genetic relationships between weight loss in early lactation and daily milk production throughout lactation in holstein cows |
| topic | genetic parameters test-day model body weight loss milking robot dairy cows |
| url | http://www.sciencedirect.com/science/article/pii/S0022030223002175 |
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