Relationship between Somatic Cell Score and Fat Plus Protein Yield in the First Three Lactations in Spanish Florida Goats
The aim of this study was to estimate genetic parameters of somatic cell score (SCS) and fat plus protein yield (FPY) using repeatability (RM) and random regression (RRM) models in Florida goats. The data consisted of 340,654 test-day controls of the first three lactations, and the pedigree containe...
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MDPI AG
2023-12-01
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| Series: | Dairy |
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| Online Access: | https://www.mdpi.com/2624-862X/5/1/1 |
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| author | Rocío Jiménez-Granado Antonio Molina Manuel Sánchez Rodríguez Chiraz Ziadi Alberto Menéndez Buxadera |
| author_facet | Rocío Jiménez-Granado Antonio Molina Manuel Sánchez Rodríguez Chiraz Ziadi Alberto Menéndez Buxadera |
| author_sort | Rocío Jiménez-Granado |
| collection | DOAJ |
| description | The aim of this study was to estimate genetic parameters of somatic cell score (SCS) and fat plus protein yield (FPY) using repeatability (RM) and random regression (RRM) models in Florida goats. The data consisted of 340,654 test-day controls of the first three lactations, and the pedigree contained 36,144 animals. Covariance components were estimated with a bivariate RM and RRM using the REML approach. Both models included as fixed effects the combination of herd and control date, litter size, kidding number and lactation length, and as random effects, the additive genetic and permanent environmental effects. A variation in the shape of the genetic parameters along the lactation curve was observed for both traits, and h<sup>2</sup> oscillated between 0.272 and 0.279 for SCS and 0.099 and 0.138 for FPY. The genetic correlation between SCS and FPY was negative and medium (−0.304 to −0.477), indicating that a low-SCS EBV is associated with a genetic predisposition to high FPY production. Our results showed that given the magnitude of h<sup>2</sup> for SCS and its r<sub>g</sub> with FPY, the SCS could be used as a selection criterion to increase resistance to mastitis, thus obtaining an improved dairy and cheese aptitude in this breed. |
| first_indexed | 2024-04-24T18:25:05Z |
| format | Article |
| id | doaj.art-e6ae69175be543bc8f0b9582b743735d |
| institution | Directory Open Access Journal |
| issn | 2624-862X |
| language | English |
| last_indexed | 2024-04-24T18:25:05Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
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| series | Dairy |
| spelling | doaj.art-e6ae69175be543bc8f0b9582b743735d2024-03-27T13:32:49ZengMDPI AGDairy2624-862X2023-12-015111210.3390/dairy5010001Relationship between Somatic Cell Score and Fat Plus Protein Yield in the First Three Lactations in Spanish Florida GoatsRocío Jiménez-Granado0Antonio Molina1Manuel Sánchez Rodríguez2Chiraz Ziadi3Alberto Menéndez Buxadera4Departamento de Produccion Animal, Universidad de Cordoba, Campus de Rabanales, Ctra, Madrid–Cadiz, km 396, 14071 Cordoba, SpainDepartamento de Genetica, Universidad de Cordoba, Campus de Rabanales, Ctra, Madrid–Cadiz, km 396, 14071 Cordoba, SpainDepartamento de Produccion Animal, Universidad de Cordoba, Campus de Rabanales, Ctra, Madrid–Cadiz, km 396, 14071 Cordoba, SpainDepartamento de Genetica, Universidad de Cordoba, Campus de Rabanales, Ctra, Madrid–Cadiz, km 396, 14071 Cordoba, SpainDepartamento de Genetica, Universidad de Cordoba, Campus de Rabanales, Ctra, Madrid–Cadiz, km 396, 14071 Cordoba, SpainThe aim of this study was to estimate genetic parameters of somatic cell score (SCS) and fat plus protein yield (FPY) using repeatability (RM) and random regression (RRM) models in Florida goats. The data consisted of 340,654 test-day controls of the first three lactations, and the pedigree contained 36,144 animals. Covariance components were estimated with a bivariate RM and RRM using the REML approach. Both models included as fixed effects the combination of herd and control date, litter size, kidding number and lactation length, and as random effects, the additive genetic and permanent environmental effects. A variation in the shape of the genetic parameters along the lactation curve was observed for both traits, and h<sup>2</sup> oscillated between 0.272 and 0.279 for SCS and 0.099 and 0.138 for FPY. The genetic correlation between SCS and FPY was negative and medium (−0.304 to −0.477), indicating that a low-SCS EBV is associated with a genetic predisposition to high FPY production. Our results showed that given the magnitude of h<sup>2</sup> for SCS and its r<sub>g</sub> with FPY, the SCS could be used as a selection criterion to increase resistance to mastitis, thus obtaining an improved dairy and cheese aptitude in this breed.https://www.mdpi.com/2624-862X/5/1/1genetic parametersfatproteinsomatic cell scorelactationsdairy goat |
| spellingShingle | Rocío Jiménez-Granado Antonio Molina Manuel Sánchez Rodríguez Chiraz Ziadi Alberto Menéndez Buxadera Relationship between Somatic Cell Score and Fat Plus Protein Yield in the First Three Lactations in Spanish Florida Goats Dairy genetic parameters fat protein somatic cell score lactations dairy goat |
| title | Relationship between Somatic Cell Score and Fat Plus Protein Yield in the First Three Lactations in Spanish Florida Goats |
| title_full | Relationship between Somatic Cell Score and Fat Plus Protein Yield in the First Three Lactations in Spanish Florida Goats |
| title_fullStr | Relationship between Somatic Cell Score and Fat Plus Protein Yield in the First Three Lactations in Spanish Florida Goats |
| title_full_unstemmed | Relationship between Somatic Cell Score and Fat Plus Protein Yield in the First Three Lactations in Spanish Florida Goats |
| title_short | Relationship between Somatic Cell Score and Fat Plus Protein Yield in the First Three Lactations in Spanish Florida Goats |
| title_sort | relationship between somatic cell score and fat plus protein yield in the first three lactations in spanish florida goats |
| topic | genetic parameters fat protein somatic cell score lactations dairy goat |
| url | https://www.mdpi.com/2624-862X/5/1/1 |
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