Phenotypic analysis of milk composition, milk urea nitrogen and somatic cell score of Italian Jersey cattle breed
The present study aimed to assess the phenotypic variation of milk yield (MY) and quality traits in Italian Jersey (IJ) breed. Sources of variation were investigated through a linear mixed model, including the fixed effects of days in milk (DIM), parity, calving season, milking frequency, recording...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2019-01-01
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| Series: | Italian Journal of Animal Science |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/1828051X.2018.1531684 |
| _version_ | 1828766706265227264 |
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| author | Chiara Roveglia Giovanni Niero Mauro Penasa Raffaella Finocchiaro Maurizio Marusi Nicolas Lopez-Villalobos Martino Cassandro |
| author_facet | Chiara Roveglia Giovanni Niero Mauro Penasa Raffaella Finocchiaro Maurizio Marusi Nicolas Lopez-Villalobos Martino Cassandro |
| author_sort | Chiara Roveglia |
| collection | DOAJ |
| description | The present study aimed to assess the phenotypic variation of milk yield (MY) and quality traits in Italian Jersey (IJ) breed. Sources of variation were investigated through a linear mixed model, including the fixed effects of days in milk (DIM), parity, calving season, milking frequency, recording type, the interaction between DIM and parity, and the random effects of herd-test-day (HTD), cow and the residual. Results highlighted the high contents of milk fat (5.18%), protein (4.08%) and casein (3.16%) of IJ cows. Somatic cell score, averaging 3.35 units, should be lowered through specific managerial actions. Phenotypic variances of MY and milk quality traits were mainly due to cow effect, whereas phenotypic variance of milk urea nitrogen (MUN) content was mainly due to HTD effect, meaning that managerial conditions, especially feeding, are very important to explain the variation of MUN. In conclusion, the present study allowed to characterise milk of IJ cows at population level and to identify environmental factors associated with variation of MY and quality traits, which will be useful to adjust phenotypic records in genetic evaluation of Jersey breed.Highlights Factors affecting milk quality traits of Italian Jersey cows have been investigated. Phenotypic variance of milk composition and SCS was mainly due to cow effect, and that of MUN was mainly driven by herd-test-day effect. Significant environmental factors identified in the present study will be used to adjust phenotypic records in genetic analysis. |
| first_indexed | 2024-12-11T07:12:09Z |
| format | Article |
| id | doaj.art-c3815019ef8e46aba558a24b618b18d2 |
| institution | Directory Open Access Journal |
| issn | 1828-051X |
| language | English |
| last_indexed | 2024-12-11T07:12:09Z |
| publishDate | 2019-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Italian Journal of Animal Science |
| spelling | doaj.art-c3815019ef8e46aba558a24b618b18d22022-12-22T01:16:20ZengTaylor & Francis GroupItalian Journal of Animal Science1828-051X2019-01-0118140540910.1080/1828051X.2018.15316841531684Phenotypic analysis of milk composition, milk urea nitrogen and somatic cell score of Italian Jersey cattle breedChiara Roveglia0Giovanni Niero1Mauro Penasa2Raffaella Finocchiaro3Maurizio Marusi4Nicolas Lopez-Villalobos5Martino Cassandro6University of PadovaUniversity of PadovaUniversity of PadovaAssociazione Nazionale Allevatori bovini della razza Frisona ItalianaAssociazione Nazionale Allevatori bovini della razza Frisona ItalianaMassey UniversityUniversity of PadovaThe present study aimed to assess the phenotypic variation of milk yield (MY) and quality traits in Italian Jersey (IJ) breed. Sources of variation were investigated through a linear mixed model, including the fixed effects of days in milk (DIM), parity, calving season, milking frequency, recording type, the interaction between DIM and parity, and the random effects of herd-test-day (HTD), cow and the residual. Results highlighted the high contents of milk fat (5.18%), protein (4.08%) and casein (3.16%) of IJ cows. Somatic cell score, averaging 3.35 units, should be lowered through specific managerial actions. Phenotypic variances of MY and milk quality traits were mainly due to cow effect, whereas phenotypic variance of milk urea nitrogen (MUN) content was mainly due to HTD effect, meaning that managerial conditions, especially feeding, are very important to explain the variation of MUN. In conclusion, the present study allowed to characterise milk of IJ cows at population level and to identify environmental factors associated with variation of MY and quality traits, which will be useful to adjust phenotypic records in genetic evaluation of Jersey breed.Highlights Factors affecting milk quality traits of Italian Jersey cows have been investigated. Phenotypic variance of milk composition and SCS was mainly due to cow effect, and that of MUN was mainly driven by herd-test-day effect. Significant environmental factors identified in the present study will be used to adjust phenotypic records in genetic analysis.http://dx.doi.org/10.1080/1828051X.2018.1531684jersey cowitalian dairy sectormilk composition |
| spellingShingle | Chiara Roveglia Giovanni Niero Mauro Penasa Raffaella Finocchiaro Maurizio Marusi Nicolas Lopez-Villalobos Martino Cassandro Phenotypic analysis of milk composition, milk urea nitrogen and somatic cell score of Italian Jersey cattle breed Italian Journal of Animal Science jersey cow italian dairy sector milk composition |
| title | Phenotypic analysis of milk composition, milk urea nitrogen and somatic cell score of Italian Jersey cattle breed |
| title_full | Phenotypic analysis of milk composition, milk urea nitrogen and somatic cell score of Italian Jersey cattle breed |
| title_fullStr | Phenotypic analysis of milk composition, milk urea nitrogen and somatic cell score of Italian Jersey cattle breed |
| title_full_unstemmed | Phenotypic analysis of milk composition, milk urea nitrogen and somatic cell score of Italian Jersey cattle breed |
| title_short | Phenotypic analysis of milk composition, milk urea nitrogen and somatic cell score of Italian Jersey cattle breed |
| title_sort | phenotypic analysis of milk composition milk urea nitrogen and somatic cell score of italian jersey cattle breed |
| topic | jersey cow italian dairy sector milk composition |
| url | http://dx.doi.org/10.1080/1828051X.2018.1531684 |
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