ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (6): 990-999.doi: 10.11843/j.issn.0366-6964.2017.06.003

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Relation between Feather Speed and Gene Structure of Repeated Sequences of ev21 Occupied-site and Unoccupied-site Regions in Chicken

ZHANG Le-chao1, WANG Han3, ZHANG Xiu-ling1,4, LIU Chun-yang1, WANG Qi1, ZHOU Rong-yan1, LI Xiang-long2*, LI Lan-hui1*   

  1. 1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China;
    2. Hebei Normal University of Science & Technology, Qinhuangdao 066600, China;
    3. College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China;
    4. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2017-01-06 Online:2017-06-23 Published:2017-06-23

Abstract:

The aim of this study was to explore the molecular basis of Hae Ⅲ digestion detection of genotypes of chicken feather speed in chicken. Three hundred and thirteen individuals in 6 strains of chickens (Taihang, Bashang Long-tail, Dawufen, Hy-line Gray, Hy-line Brown, progenitor of Hy-line Gray) with definite phenotype of feather speed were detected with RFLP. The common region of occupied site(OS) and unoccupied site(US) for 538 bp, also the specific region of OS for 1 440 bp, were digested with Hae Ⅲ. The results showed that: 1) The fragment for 1 450 bp was the unoccupied-site repeated sequence for ev21 ascertained by Blast. The digestion detection results of Hae Ⅲ for 1 450 bp were completely consistent with the phenotype of HY-line Gray and progenitors of HY-line Gray and Dawufen, but their consistency with Taihang slow-feather cock, Taihang slow-feather hen, Bashang Long-tail slow-feather cock and HY-line Brown slow-feather chicken were 40.0%, 27.6%, 28.6% and 0.0%, respectively. 2) The consistency was above 92% between digestion results of 538 bp and phenotype in Taihang and Bashang Long-tail chicken, and the other strains were 100.0% except for HY-line Brown fast-feather cock with 0.0%. 3) The positive rate of 1 440 bp fragment PCR in slow-feather Taihang cock, Taihang hen and fast-feather Taihang cock was 94.1%, 65.5% and 0.0%, respectively, and it was 100.0% and 0.0% in slow-feather and fast-feather progenitors of Hy-line gray, respectively. The 1 440 bp fragment could not be digested by Hae Ⅲ and it could be a detection basis for ev21.The structure was analyzed comprehensively for the OS and US of ev21 in 6 strains of chicken and it was concluded that the site recognized by Hae Ⅲ enzyme in US could not be a detection base for slow-feather and ev21, while ev21 insertion in OS and the site for Hae Ⅲ digestion in 1 440 bp were linked with the mutation of A → G and 8 bases repeated.

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