ACTA VETERINARIA ET ZOOTECHNICA SINICA

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Genome-wide Association Study on Shank Length and Shank Girth in Chicken

SUN Yan-fa1,2, LIU Ran-ran2, ZHENG Mai-qing2, ZHAO Gui-ping2, ZHANG Lei2, WU Dan2, HU Yao-dong2, LI Peng2, WEN Jie1,2*   

  1.   (1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; 2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China)
  • Received:2012-07-09 Online:2013-03-23 Published:2013-03-23

Abstract:

To reveal genetic basis and molecular mechanism affecting shank growth in chicken, live weight, shank length and shank girth of F2 generation individuals were measured at 93-day-old, these birds came from Chinese Academy of Agricultural Sciences (CAAS) chicken F2 rescoure population. Genomic DNA was genotyped using chicken 60 K SNP Beadchip. The genome-wide association study (GWAS) on shank length and shank girth were performed. The results showed that 1 and 4 SNPs were significantly associated with shank length and girth (P<2.98×10-6), respectively at 5% genome-wide level; 4 and 25 SNPs were suggestive associatied with the two traits (P<5.96×10-5), respectively. SNPs located at downstream of NKX2-5 and ELAVL4 on chromosome 13 and 8 were signficantly associated with shank length and girth, respectively at 5% genome-wide level. Many SNPs associated with shank length were in 14.93 Mb region (71.01-85.94 Mb) on chromosome 4, and LDB2, BOD1L1 and QDPR were in this region. These genes and regions could be important candidate genes and regions for shank length and girth. The results lay a foundation for revealing the genetic basis and molecular mechanism for shank growth and marker assisted selection in the further.

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