Selecting Diploid Potato Clones Suitable for Transposon Tagging of the R-genes against Late Blight (<I>Phytophthora bare infestans</I>): Selecting Genotypes Carrying R1 and R3

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Nithi Thaisantad

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The process of developing and selecting diploid potato (Solanum tuberosum L.) clones for transposon tagging of the Phytophthora infestans resistance genes-R, was applied to various potato genotypes. The plants carrying allele R1 or R3 were selected for possessing the following characteristics: diploid genome, high fertility, straight segregation of the R-allele, efficicient regeneration in vitro and high rate of transformation by the Agrobacterium tumefaciens carrying genes NPTII and GUS interon. Three of each R1-and R3 -carrying clones performed those desirable characteristics.

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