Generally,
CIAT has been deploying CMD2 donor parents as
the source of resistance in Latin American cassava
germplasm and this has remained the main source of
CMD resistance in the AR and CR series of cassava
genotypes as used in this study. Although AR42-4 was
developed using theCMD2 donor parent in its pedigree,
its susceptibility to CMD indicates that the RME-1
marker allele for the CMD2 gene as found in this
genotype from marker analysis was a false positive
which could occur through recombination.