کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4494415 1318713 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Genetic parameters for somatic cell score and production traits in the first three lactations of Chinese Holstein cows
ترجمه فارسی عنوان
پارامترهای ژنتیکی برای نمره سلولی سوماتیک و صفات تولیدی در سه دوره اول شیردهی گاوهای هلشتاین چینی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی

The objectives of this study were to estimate genetic parameters of lactation average somatic cell scores (LSCS) and examine genetic associations between LSCS and production traits in the first three lactations of Chinese Holstein cows using single-parity multi-trait animal model and multi-trait repeatability animal model. There were totally 273 605 lactation records of Chinese Holstein cows with first calving from 2001 to 2012. Heritability estimates for LSCS ranged from 0.144 to 0.187. Genetic correlations between LSCS and 305 days milk, protein percentage and fat percentage were −0.079, −0.082 and −0.135, respectively. Phenotypic correlation between LSCS and 305 days milk yield was negative (−0.103 to −0.190). Genetic correlation between 305 days milk and fat percentage or protein percentage was highly negative. Genetic correlation between milk fat percentage and milk protein percentage was highly favorable. Heritabilities of production traits decreased with increase of parity, whereas heritability of LSCS increased with increase of parity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Integrative Agriculture - Volume 14, Issue 1, January 2015, Pages 125-130