Association between RAPD marker OPAS13950c and anthracnose resistance allele Co-43 of common bean cultivar PI 207262

Abstract

Cultivar PI 207262 is an important source of resistance to common bean anthracnose caused by the fungus Colletotrichum lindemuthianum. Previous studies identified the presence of anthracnose resistance genes Co-43 and Co-9 in PI207262. Markers OPY20s35c and OPAS13 5. have been identified as tightly linked to Co-4 gene of cultivar TO and Co-4o allele of cultivar G 2333 and Selection 1308, respectively. Potentially these markers could be helpful in the selection of plants harboring the Co-4o allele derived from PI 207262. Main goals of the present study were to test markers OPY20s30c and OPAS1 39509c to identify the most promising molecular marker linked to the Co-43 allele and determine the genetic distance between each marker and the allele. We observed that the RAPD molecular marker OPAS13,,s linked at 3.5 cM from Co-4. This is the first study that reports a molecular marker associated to Co-4% anthracnose retance allele of the common bean cultivar PI 207262.