Single nucleotide polymorphisms in the chicken Lmbr1 gene are associated with chicken polydactyly

Yan Qun Huang, Xue Mei Deng, Zhi Qiang Du, Xiangpin Qiu, Xiaohui Du, Wen Chen, Mireille Morisson, Sophie Leroux, F. Abel Ponce de Léon, Yang Da, Ning Li

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Polydactyly is a common malformation of vertebrate limbs. Preaxial polydactyly (PPD) has been mapped in human, mouse and chicken to the syntenic region of human 7q36. Lmbr1 was thought as the critical candidate gene for human and mouse PPD. To understand the molecular mechanism underlying chicken polydactyly, we have cloned the open reading frame (ORF) of chicken Lmbr1, which contains 1467 nucleotides. Within this ORF, we found one short and one long splice forms. The short splice form has a complete deletion of exon 4. Six cSNPs were found in the chicken ORF, and two of these cSNPs, G797A and G1255A, lead to amino acid substitutions. However, G797A substitution had no significant association with polydactyly and the G1255A substitution had very low frequency in the population. The T1254C polymorphism in exon 13 was found to be strongly associated with polydactyly. Radiation hybrid mapping of a DNA fragment containing intron 13 of the chicken Lmbr1 assigned the gene to chromosome 2 between MCW071 (a marker within the EN2 gene) and ADL0270, a syntenic region to human 7q36.

Original languageEnglish (US)
Pages (from-to)10-18
Number of pages9
JournalGene
Volume374
Issue number1-2
DOIs
StatePublished - Jun 7 2006

Bibliographical note

Funding Information:
Financial support of this research is provided by the State Major Basic Research Development Program (G20000161), P.R. China.

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

Keywords

  • Chicken
  • Lmbr1
  • RH mapping
  • Splice form
  • cSNP

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