Udder and teat morphology traits associated with milk production and somatic cell score in dairy sheep from a New Zealand flock

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dc.citation.issue3
dc.citation.volume67
dc.contributor.authorMarshall AC
dc.contributor.authorLopez-Villalobos N
dc.contributor.authorLoveday SM
dc.contributor.authorWeeks M
dc.contributor.authorMcNabb W
dc.contributor.editorHandcock R
dc.date.accessioned2024-10-23T00:54:22Z
dc.date.available2024-10-23T00:54:22Z
dc.date.issued2024
dc.description.abstractThe objective of this study was to estimate the phenotypic correlations between udder and teat morphology traits, milk production traits, and somatic cell score in dairy sheep from a flock in New Zealand. A total of 162 lactating ewes were scored for morphology traits during the milk production season of 2021–2022. The 130-d lactation yields of milk, fat, protein, and lactose were obtained with 2–4 test-days from each ewe and modelled using random regression with orthogonal polynomials. Age had a significant effect on all udder and teat traits. Coat-colour (genetic variety within the breed; white or black) was a significant effect for teat angle and udder separation. Udders that were above the hook were associated with lower milk, fat, protein, and lactose yields. Udders with well-defined separation between halves were associated with higher milk, protein, and lactose yields, and with lower somatic cell count. Well-attached udders were associated with lower fat yield and lower somatic cell score. Teats with a backwards angle were associated with lower milk and lactose yields. Further studies are needed to estimate heritability and genetic correlations between these traits to determine whether these traits should be implemented in breeding programs for dairy sheep in New Zealand.
dc.description.confidentialfalse
dc.format.pagination348-360
dc.identifier.citationMarshall AC, Lopez-Villalobos N, Loveday SM, Weeks M, McNabb W. (2024). Udder and teat morphology traits associated with milk production and somatic cell score in dairy sheep from a New Zealand flock. New Zealand Journal of Agricultural Research. 67. 3. (pp. 348-360).
dc.identifier.doi10.1080/00288233.2023.2248929
dc.identifier.eissn1175-8775
dc.identifier.elements-typejournal-article
dc.identifier.issn0028-8233
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71820
dc.languageEnglish
dc.publisherTaylor and Francis Group on behalf of the Royal Society of New Zealand
dc.publisher.urihttps://www.tandfonline.com/doi/full/10.1080/00288233.2023.2248929
dc.relation.isPartOfNew Zealand Journal of Agricultural Research
dc.rights(c) 2023 The Author/s
dc.rightsCC BY-NC-ND 4.0
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectDairy sheep
dc.subjectudder morphology traits
dc.subjectteat morphology traits
dc.subjectmilk production
dc.subjectsomatic cell score
dc.titleUdder and teat morphology traits associated with milk production and somatic cell score in dairy sheep from a New Zealand flock
dc.typeJournal article
pubs.elements-id480253
pubs.organisational-groupOther
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