Isozyme Locus Pgm-1 Is Tightly Linked to a Gene (Vf) for Scab Resistance in Apple

in Journal of the American Society for Horticultural Science
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  • 1 National Agricultural Research Foundation, Pomology Institute, Naoussa 59200, Greece
  • | 2 Horticultural Research International, East Malling, England
  • | 3 New York State Agricultural Experiment Station, Cornell University, Geneva, NY 14456

Pgm-1, the gene responsible for variation in the most anodal isozyme of phosphoglucomutase in apple (Malus spp.), is shown to lie ≈8 centiMorgans from the gene Vf, which confers apple-scab resistance. The proximity of the marker and the ease by which allozymic forms can be resolved suggest that Pgm-1 will be useful for following the inheritance of scab resistance conferred by Vf.

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