کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5542094 | 1402514 | 2017 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Genetic and nongenetic factors associated with milk color in dairy cows
ترجمه فارسی عنوان
عوامل ژنتیکی و غیر زیستی مرتبط با رنگ شیر در گاوهای شیری
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
Milk color is one of the sensory properties that can influence consumer choice of one product over another and it influences the quality of processed dairy products. This study aims to quantify the cow-level genetic and nongenetic factors associated with bovine milk color traits. A total of 136,807 spectra from Irish commercial and research herds (with multiple breeds and crosses) were used. Milk lightness
(LË*), red-green index
(aË*) and yellow-blue index
(bË*) were predicted for individual milk samples using only the mid-infrared spectrum of the milk sample. Factors associated with milk color were breed, stage of lactation, parity, milking-time, udder health status, pasture grazing, and seasonal calving. (Co)variance components for
LË*,aË*, and
bË* were estimated using random regressions on the additive genetic and within-lactation permanent environmental effects. Greater
bË* value (i.e., more yellow color) was evident in milk from Jersey cows. Milk
LË* increased consistently with stage of lactation, whereas
aË* increased until mid lactation to subsequently plateau. Milk
bË* deteriorated until 31 to 60 DIM, but then improved thereafter until the end of lactation. Relative to multiparous cows, milk yielded by primiparae was, on average, lighter (i.e., greater
LË*), more red (i.e., greater
aË*), and less yellow (i.e., lower
bË*). Milk from the morning milk session had lower
LË*,aË*, and
bË* Heritability estimates (±SE) for milk color varied between 0.15 ± 0.02 (30 DIM) and 0.46 ± 0.02 (210 DIM) for
LË*, between 0.09 ± 0.01 (30 DIM) and 0.15 ± 0.02 (305 DIM) for
aË*, and between 0.18 ± 0.02 (21 DIM) and 0.56 ± 0.03 (305 DIM) for
bË* For all the 3 milk color features, the within-trait genetic correlations approached unity as the time intervals compared shortened and were generally <0.40 between the peripheries of the lactation. Strong positive genetic correlations existed between
bË* value and milk fat concentration, ranging from 0.82 ± 0.19 at 5 DIM to 0.96 ± 0.01 at 305 DIM and confirming the observed phenotypic correlation (0.64, SE = 0.01). Results of the present study suggest that breeding strategies for the enhancement of milk color traits could be implemented for dairy cattle populations. Such strategies, coupled with the knowledge of milk color traits variation due to nongenetic factors, may represent a tool for the dairy processors to reduce, if not eliminate, the use of artificial pigments during milk manufacturing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 100, Issue 9, September 2017, Pages 7345-7361
Journal: Journal of Dairy Science - Volume 100, Issue 9, September 2017, Pages 7345-7361
نویسندگان
S. Scarso, S. McParland, G. Visentin, D.P. Berry, A. McDermott, M. De Marchi,