ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2013, Vol. 44 ›› Issue (11): 1739-1748.doi: 10.11843/j.issn.0366-6964.2013.11.007

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Analysis of Influence Factors on Milk Fatty Acids Traits in Chinese Holstein

LI Cong1, ZHANG Sheng-li1, LIU Lin2, LI Yan-hua2, QIAO Lü2, SUN Dong-xiao1*   

  1. (1. National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics,Breeding and Reproduction of Ministry of Agriculture, College of Animal Science and Technology,China Agricultural University, Beijing 100193, China; 2. Beijing Dairy Cattle Center, Beijing 100192, China)
  • Received:2012-12-10 Online:2013-11-23 Published:2013-11-23

Abstract:

The aim of the present study was to analyze the effect of fixed effects, including herd, parity, sire and days in milk, on fatty acids traits in Chinese Holstein cattle. Totally 816 Chinese Holstein cows from Beijing were selected as experimental population. By the General Linear Model (GLM) procedure of software SAS 9.1 fixed effect model, the effects of the 4 factors on 27 fatty acids traits(myristic acid (C14:0), palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), and so on) were estimated. The phenotypes of 27 traits were measured by using gas chromatography. The results showed that C16:0, C18:1n9c, C18:0, C14:0 and C18:2 were the main components of milk. Of them, the proportion of C16:0 was the highest(32.65%), SFAUFA=1.701. The effects of herd and days in milk on all fatty acids traits were significant (P<0.001), and the effect of sire on main fatty acids traits reached significant level (P<0.05). However, no signifcant effect of parity on fatty acids traits was found (P>0.05). The result indicate that 3 factors, including herd, sire and days in milk, showed significant effects on milk fatty acids traits in Chinese Holstein. The results provide basis for genome-wide association study and gene mapping for milk fatty acids traits in dairy cattle, and are meaningful for milk nutrition improvement.

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