English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The physiologically higher number of somatic cells in the goat’s milk than in the cow’s milk is mainly due to a high number of exfoliated cells. The results of our earlier study (Bagnicka et al., 2011) showed, that after removing the cytoplasmic particles together with fat, the exfoliated epithelial cells reached up to 67% of total somatic cell count (SCC) in healthy mammary gland. It is strongly evidenced that not only leukocytes but also epithelial cells play a crucial role in the initiation of inflammatory process (Rainard and Riollet, 2003); thus, the high SCC in goat’s milk, including exfoliated epithelial cells, might be the reason for the low frequency of clinical mastitis in dairy goats. Nonetheless, subclinical mastitis is also one of the main problems in dairy goat herds. The SCC in goat’s milk should not be the sole indicator of bacterial infection of the goat mammary gland. About 20% of samples with somatic cells below 1 × 106 · ml–1 contain bacterial pathogens, including those belonging to the major group. Moreover, many factors can affect the SCC level (Bagnicka et al., 2011). ABSTRACT. The aim of the study was to estimate the heritability and repeatability of somatic cell score (SCS) and lactose content, and also the genetic correlation between those and other dairy production traits. Milk yield, fat, protein and lactose content, and somatic cell count were recorded once a month for 11 years in a single herd, resulting in 4 417 records from 282 does. The number of animals in pedigree was 11 659. An animal multiple-trait model accounted for breed, day of milking (Legendre polynomial regression on standardized days-in-milk), year of birth, year of milking, kidding season, litter size and parity. Variance components were estimated with the REML method using the DMU software. The highest content of lactose was found in the milk of primiparous goats which gave birth to one kid. The youngest goats had the lowest SCS. The heritabilities for SCS and lactose content were 0.21 and 0.27, while repeatabilities were 0.31 and 0.55, respectively. The genetic correlation between milk yield and lactose content was -0.46, while between milk yield and SCS was 0.59. The genetic correlations between lactose content and fat and protein contents were 0.62 and 0.54, respectively. No correlations between SCS and protein, fat and lactose contents were found. Lactose content and SCS in goat’s milk proved to be highly heritable which facilitates efficient inclusion of these traits in the breeding objective. Received: 4 September 2014 Revised: 22 March 2016 Accepted: 19 July 2016

Genetic parameters of somatic cell score and lactose content in goat’s milk