Molecular Marker Screening of Potato Late Blight Resistant Gene R8 and Evaluation of Field Resistance
Potato is an important food crop that plays an important role in global food security.Late blight caused by Phytophthora infestans is one of the most devastating diseases in potato production,and planting broad-spectrum and durable resistant varieties is the most economical,effective and green way to control late blight.In this study,102 resources were conduced for R8 gene using specific molecular markers,and 84 potato materials with disease resistance and containing R8 gene were selected in combination with field late blight resistance identification,providing abundant resource materials for selection and breeding of disease resistant varieties.According to the results of molecular marker and field resistance identification,the molecular marker resistance compliance was 84.8％,so the R8 molecular marker could be used for marker-assisted selection.
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