ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (11): 2104-2110.doi: 10.11843/j.issn.0366-6964.2015.11.025

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Genome-wide Linkage Analysis for Liver Weight and Color in Chicken

SUN Yan-fa1,2,ZHAO Gui-ping2,LIU Ran-ran2,ZHENG Mai-qing2,LIU Li2,LI Peng2,WEN Jie2*   

  1. (1.College of Life Science,Longyan University,Longyan 364012,China;2.Institute of Animal Science,Chinese Academy of Agricultural Sciences,Beijing 100193,China)
  • Received:2015-04-01 Online:2015-11-23 Published:2015-11-23

Abstract:

To reveal the genetic basis and molecular mechanism of liver weight and color in chicken,5 traits,including liver weight,percentage of liver weight to carcass weight and liver color(lightness L*,redness a* and yellowness b*) were measured from 300 93-day-old F2 generation chickens from Chinese Academy of Agricultural Sciences(CAAS) chicken F2 resource population.Genome-wide linkage analysis for the liver weight and color traits were preformed on the basis of the CAAS chicken F2 resource population and genetic linkage map.The results of the present study showed that 11 quantitative trait loci(QTLs) for 5 traits were found,which explained 3.39%-6.43% of the phenotypic variation.A total of 3 QTLs on 3 chicken(Gallus gallus) chromosomes,at 22 cM on chicken chromosome 5(GGA5),56 cM on GGA12 and 1 cM on GGA15,for liver weight and the percentage of liver weight to carcass weight were identified.A total of 8 QTLs for liver color were found on 6 chicken chromosomes.Two interesting QTL regions for liver color were found,one region spanned 14 cM(16-30 cM) on GGA15 containing 2 QTLs for the chicken liver L* and b*,and the other region spanned 6 cM(81-87 cM) on GGA1 containing 2 QTLs for the chicken liver a* and b*.The present study provides the basis for further fine mapping and molecular marker-assisted selection for liver weight and color traits in chicken.

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