ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (10): 1855-1862.doi: 10.11843/j.issn.0366-6964.2017.10.008

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Effect of Non-genetic Factors on Body Measurement Traits and Estimation of Genetic Parameters in Yili Horses

MA Yu-hui1,2, GAO Li1*, LI Hai2, XIAO Jian-hua1, ZENG Ya-qi3   

  1. 1. College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China;
    2. Animal Husbandry and Veterinary Station of Zhaosu, Zhaosu 835600, China;
    3. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China
  • Received:2017-03-15 Online:2017-10-23 Published:2017-10-23

Abstract:

The study aimed to analyze the effect of non-genetic factors on body measurements in Yili horse and estimate genetic parameters of body measurement traits. The 1 556 records about body measurement traits of 1-11 years old horse during 2005-2014 year were used to estimate effect of non-genetic factors on body measurement traits by least square variance analysis, the genetic parameters and heritabilities of body measurement traits and correlation among traits were estimated by REML by animal model. The results showed that the herd, age and birth year had significant effect on body height, body length, chest girth and cannon circumference(P<0.01), the sex had significant effect on body height, body length and cannon circumference(P<0.01) but had no significant effect on chest girth(P>0.05). The heritability of body height, body length, chest girth and cannon circumference were 0.87, 0.67, 0.40 and 0.52, respectively. Body length and chest girth had the highest genetic correlation, the correlation coefficient was 0.93. Body height and cannon circumference had the highest phenotypic correlation, the correlation coefficient was 0.65. Body height was significantly related in phenotype to body length, chest girth and cannon circumference(P<0.01), respectively. Body length was significantly related in phenotype to chest girth and cannon circumference(P<0.01), respectively. Cannon circumference was significantly related in phenotype to chest girth(P<0.01). The results will provide a theoretical basis for the genetic evaluation of body size traits in Yili horses.

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