Are the areas with extremely high and low centiMorgan values related to SNP Rich and SNP poor areas?
No, SNP Rich and SNP Poor areas are due to the number and location of SNPs (single nucleotide polymorphims) chosen by the microarray chip manufacturer. If the manufacturer includes many SNPs from an area on the chip, the area is SNP Rich. However, if few SNPs from an area are included on the chip, the area is SNP Poor.