The inheritance of somatic cell counts (index of mastitis) in Chios sheep

A.P. Mavrogenis; A. Koumas; G. Gavrielidis

The inheritance of somatic cell counts (index of mastitis) in Chios sheep

In: Milking and milk production of dairy sheep and goats

Authors:

A.P. Mavrogenis

A.P. Mavrogenis Agricultural Research Institute, Nicosia, Cyprus

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A. Koumas

A. Koumas Agricultural Research Institute, Nicosia, Cyprus

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G. Gavrielidis

G. Gavrielidis Agricultural Experiment Station, Halkidiki, Greece

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Type:: Chapter

Pages:: 389–392

DOI:: https://doi.org/10.1163/9789004683877_081

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Summary

Data on 1,457 Chios ewes, collected from two experimental flocks (Athalassa and Orites), were used to estimate genetic parameters for milk production and somatic cell counts in milk. The data refer to individual test-day records for milk and milk samples collected 7±3 days following weaning (35±3 days post-partum). Somatic cell counts (SCC) were determined using the Fossomatic counter from chilled milk samples. Small but significant differences in milk production and SCC were found between flocks. Test-day individual milk yield was highest when SCC was low and lowest when SCC was above 10 × 10⁶ cells/ml. Estimated heritabilities for test-day individual milk yield (0.26±0.07) and SCC (0.18±0.06), although moderately low, are sufficient to permit genetic progress from selection. The repeatability estimates for the traits studied were higher. Genetic and phenotypic correlations were low and insignificant. Somatic cell counts as an index of mastitis are relatively easy to measure and heritable. It may be suggested that they could be used towards the improvement of the health status of sheep.

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Milking and milk production of dairy sheep and goats

E-Book ISBN:: 9789004683877

Publisher:: Wageningen Academic

Print Publication Date:: 01 Jan 1999

Subjects
- Life Sciences
  - General
  - Animal & Veterinary

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The inheritance of somatic cell counts (index of mastitis) in Chios sheep

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Milking and milk production of dairy sheep and goats

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