| Título: | Genetic variants of alpha s1-CN in goat milk : breed distribution and associations with milk composition and coagulation properties |
| Autores: | CLARK, STEPHANIE ; SHERBON, J. W. |
| Tipo de documento: | texto impreso |
| ISBN/ISSN/DL: | 42560 |
| Nota general: | ISBN: |
| Langues: | Inglés |
| Clasificación: | |
| Resumen: | One dairy goat herd of mixed breeds was investigated for frequency of genetic variants of alphas1-casein (as1-CN) and relationships between the genetic variants, milk composition, coagulation properties, and breed. Milk composition (percent total solids, solids-non-fats (SNF), fat, protein, casein, and as1-CN), genetic variants of as1-CN, and coagulation properties (coagulation time, coagulation rate, and curd ®rmness) were determined for the milk of 93 individual goats. The elution order of the as1-CN genetic variants by reverse-phase high pressure liquid chromatography was D, F, (E and B3), C, A, B2 or B1. The frequencies of individual variants, in descending order, were F (52.7%), E (18.3%), A (9.7%), B1 or B2 (4.8%), O and D (4.8% each), C (2.7%), and B3 (2.2%). The most common allele combinations were F/F (37.6%), F/E (10.8%), and E/E (10.8%). Milks containing at least one `high type' genetic variant (as1-CN A, B1, B2, B3, or C) contained higher percent total solids, SNF, protein, and as1-CN than milks that contained only `low type' variants (as1-CN F or D) or were homozygous for the null variant (as1-CN O/O). Alphas1-CN genetic variants were not highly correlated with coagulation properties. Milk from Nubians was more likely to contain a high type genetic variant than Alpine milk. |
| Nota de contenido: | En: Small Ruminant Research. -- (38) : 135-143 (2000) |
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