Plant Diversity ›› 2011, Vol. 33 ›› Issue (4): 376-382.DOI: 10.3724/SP.J.1143.2011.10237

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SSR Variation in the WD Repeats Domain Genes and It′s Effects on Protein Structure of Rice Blast Fungus, Magnaporthe oryzae

 LIU  Lin, LI  Cheng-Yun   

  1. Key Laboratory of AgroBiodiversity and Pest Management of Education Ministry of China, National
    Engineering Research Center AgroBiodiversity Applied Technology, Kunming  650201, China
  • Received:2010-12-13 Online:2011-08-25 Published:2011-02-18

Abstract:

WD repeats domain containing genes can participate in signal transduction, transcriptional regulation, RNA splicing and apoptosis and so on. WD repeats domain containing genes play important roles in plantpathogen interactions. SSR component and distribution in coding and regulation region of 94 WD repeats domain containing genes were analyzed in Magnaporthe oryzae, and the SSR variation in 7 coding regions of WD repeats domain containing genes was checked and analyzed its effect on secondary structure of protein. The result showed that abundance of SSRs were in the coding region and regulation region of WD repeats domain containing genes, but both SSR component and distribution were different among extron, intron, 5′UTR and 3′UTR; trinucleotide and hexanucleotide SSR in coding region were more than other region, and the frequency of hydrophilic amino acids was relatively higher. In additional, 7 SSR loci of coding region including SSR were polymorphism, and SSR polymorphism of these loci can affect the secondary structure of protein. The data of this study indicated that the mutation of SSR might play an important role for pathogenic gene mutation.

Key words: Magnaporthe oryzae, Microsatellite, WD repeats domain containing genes, Protein secondary stucture

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