Gene Analysis of Resistance to Wheat Powdery Mildew and Stripe Rust in Einkorn Accessions
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S512.1 S435.121.4

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    Abstract:

    Einkorn is the valuable genetic resource for improvement of resistance in hexaploid wheat(Triticum aestivum L.).Reaction of 24 Einkorn accessions to mixed inoculum of powdery mildew and stripe rust,and two T.urartu accessions UR204,UR206 and a T.monococcum accession MO205 were used for reaction to a set of 15 differential Blumeria graminis tritici isolates and 21 differential Puccinia striiformis isolates,respectively.Among them,UR206 was resistant to all 15 isolates,UR204 was resistant to 14 isolates except E11,and MO205 showed different resistant types.The results indicated that most likely UR206 and UR204 carried new powdery mildew resistance genes that were different from 18 known Pm genes and MO205 carried new stripe rust gene(s) that were different from 24 known Yr genes.UR204 and UR206 and MO205 were genetically analyzed for resistance to powdery mildew and stripe rust,and it was identified that each of two T.urartu accessions carried a dominant gene and MO205 carried two independent dominant genes,respectively.

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History
  • Received:June 01,2005
  • Revised:September 02,2005
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