کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2440520 1108119 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Short Communication: Estimates of Genetic Variation of Milk Fatty Acids in US Holstein Cows1
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Short Communication: Estimates of Genetic Variation of Milk Fatty Acids in US Holstein Cows1
چکیده انگلیسی
Interest in changing the milk fatty acid profile is growing. However, little is known about the genetic variability of milk fatty acids in the US Holstein population. Therefore, genetic parameters for milk fatty acids were estimated using a single-trait, mixed, linear animal model on 592 individual milk samples from 233 daughters of 53 sires in a cow herd genetically representative of the US Holstein population. Heritability (h2) and repeatability (r) estimates ± standard errors for yields of individual fatty acids ranged from 0.00 ± 0.08 (C4:0) to 0.43 ± 0.13 (C12:0) for heritabilities and from 0.21 ± 0.05 (C18:1) to 0.43 ± 0.05 (C12:0) for repeatabilities. Saturated (h2 = 0.23 ± 0.12; r = 0.36 ± 0.05) and de novo synthesized fatty acids (C6:0 to C14:0; h2 = 0.30 ± 0.13; r = 0.40 ± 0.05) had numerically higher estimates than did monounsaturated (h2 = 0.09 ± 0.09; r = 0.22 ± 0.05) and polyunsaturated fatty acids (h2 = 0.08 ± 0.09; r = 0.27 ± 0.05). For relative proportions of individual fatty acids, the greatest heritability and repeatability estimates were obtained for C8:0 (h2 = 0.18 ± 0.12; r = 0.36 ± 0.05), C10:0 (h2 = 0.22 ± 0.13; r = 0.46 ± 0.05), C12:0 (h2 = 0.18 ± 0.12; r = 0.46 ± 0.05), C16:0 (h2 = 0.09 ± 0.12; r = 0.48 ± 0.05), C16:1 (h2 = 0.49 ± 0.13; r = 0.49 ± 0.05), and C18:0 (h2 = 0.24 ± 0.11; r = 0.39 ± 0.05). Our results suggest the existence of genetic variability of milk fatty acids, in particular of medium-and long-chain fatty acids (C8:0 to C18:0), which could be used to improve the nutritional and textural properties of milk fat by selective breeding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 91, Issue 3, March 2008, Pages 1209-1213
نویسندگان
, , , , ,