Molecular Biotechnology

, Volume 34, Issue 3, pp 293–301 | Cite as

Molecular characterization of cDNA encoding resistance gene-like sequences in Buchloe dactyloides

  • Hikmet Budak
  • Zeynep Kasap
  • Robert C. Shearman
  • Ismail Dweikat
  • Ugur Sezerman
  • Abid Mahmood


Current knowledge of resistance (R) genes and their use for genetic improvement in buffalograss (Buchloe dactyloides [Nutt.] Engelm.) lag behind most crop plants. This study was conducted to clone and characterize cDNA encoding R gene-like (RGL) sequences in buffalograss. This report is the first to clone and characterize of buffalograss RGLs. Degenerate primers designed from the conserved motifs of known R genes were used to amplify RGLs and fragments of expected size were isolated and cloned. Sequence analysis of cDNA clones and analysis of putative translation products revealed that most encoded amino acid sequences shared the similar conserved motifs found in the cloned plant disease resistance genes PRS2, MLA6, L6, RPMI, and Xa1. These results indicated diversity of the R gene candidate sequences in buffalograss. Analysis of 5′ rapid amplification of cDNA ends (RACE), applied to investigate upstream of RGLs, indicated that regulatory sequences such as TATA box were conserved among the RGLs identified. The cloned RGL in this study will further enhance our knowledge on organization, function, and evolution of R gene family in buffalo grass. With the sequences of the primers and sizes of the markers provided, these RGL markers are readily available for use in a genomics-assisted selection in buffalograss.

Index Entries

Buffalograss cDNA molecular evolution resistance genes RACE 


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Copyright information

© Humana Press Inc 2006

Authors and Affiliations

  • Hikmet Budak
    • 1
  • Zeynep Kasap
    • 1
  • Robert C. Shearman
    • 2
  • Ismail Dweikat
    • 2
  • Ugur Sezerman
    • 1
  • Abid Mahmood
    • 2
  1. 1.Biological Science and Bioengineering Program, Faculty of Engineering and Natural ScienceSabanci UniversityTuzla/IstanbulTurkey
  2. 2.Department of Agronomy and HorticultureUniversity of NebraskaLincoln

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