Biologia Plantarum

, Volume 60, Issue 3, pp 505–512 | Cite as

Molecular characterization and phylogenetic analysis of Wx genes from three Taeniatherum diploid species

  • S. F. Dai
  • J. Q. Jiang
  • Y. N. Jia
  • X. F. Xue
  • D. C. Liu
  • Y. M. Wei
  • Y. L. Zheng
  • Z. H. YanEmail author
Original papers


In wheat seeds, starch synthase I or the Waxy protein is an enzyme involved in amylose synthesis. The gene encoding this enzyme is Wx and in this study, eight novel Wx alleles were identified in three diploid Taeniatherum species. The variability of these alleles was evaluated, and their nucleotide sequences were compared with those of homologous alleles from wheat. Two types of Taeniatherum Wx alleles were detected in three diploid species Ta. caput-medusae, Ta. asperum, and Ta. crinitum. A phylogenetic analysis indicates that the Taeniatherum Wx alleles were more closely related to Wx alleles from Aegilops species with C, D, M, and U genomes than to Wx alleles of other species. These alleles represent a potential genetic resource that may be useful in wheat breeding programs.

Additional key words

amylose starch Triticum aestivum Waxy protein 



isoelectric point


million years ago




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Supplementary material

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • S. F. Dai
    • 1
  • J. Q. Jiang
    • 1
  • Y. N. Jia
    • 1
  • X. F. Xue
    • 1
  • D. C. Liu
    • 1
  • Y. M. Wei
    • 1
  • Y. L. Zheng
    • 1
  • Z. H. Yan
    • 1
    Email author
  1. 1.Triticeae Research InstituteSichuan Agricultural UniversityChengdu, SichuanP.R. China

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