Associations between β‐casein genotype and milk yield and composition in grazing dairy cows
| العنوان: | Associations between β‐casein genotype and milk yield and composition in grazing dairy cows |
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| المؤلفون: | C. A. Morris, R. M. Anderson, C. G. Prosser, S. M. Hickey, M. L. Tate, Neil G. Cullen |
| المصدر: | New Zealand Journal of Agricultural Research. 48:441-450 |
| بيانات النشر: | Informa UK Limited, 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | geography, geography.geographical_feature_category, biology, Lactoferrin, Conjugated linoleic acid, food and beverages, Soil Science, Plant Science, Pasture, chemistry.chemical_compound, fluids and secretions, medicine.anatomical_structure, chemistry, Lactation, Grazing, Herd, medicine, biology.protein, Animal Science and Zoology, Composition (visual arts), Food science, Agronomy and Crop Science, Somatic cell count |
| الوصف: | Milk samples from New Zealand dairy cows at pasture were analysed to investigate the relationship between β‐casein genotype and milk yield or composition traits. A total of 1661 milk samples from 21 North Island herds were analysed from individual cows in mid lactation, from a routine herd‐test taken between mid November 2000 and early February 2001. The cows, whose ages ranged from 2 to 11 years, were the daughters of 11 widely used Holstein‐Friesian bulls. The β‐casein genotypes of the sires (A1 or A2 alleles)were: A1A1 (n = 1), A1A2 (n = 7) and A2A2 (n = 3). The milk composition traits analysed were: protein%, fat%, somatic cell count (SCC), β‐casein%, κ‐casein%, β‐lactoglobulin%, lactoferrin%, and fatty acid composition (C4‐C24, including conjugated linoleic acid). Milk yield per day, fat colour (optical density measurement), milk‐fat melting point, and an index of milk value in dollars (combining the industry's economic values for milk yield, fat yield, and protein yield) were also analysed.... |
| تدمد: | 1175-8775 0028-8233 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::7163829d75276d6ba2f45680db6f93c3Test https://doi.org/10.1080/00288233.2005.9513678Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........7163829d75276d6ba2f45680db6f93c3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 11758775 00288233 |
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