The capsaicinoid synthetase (CS) gene cosegregated perfectly with the C locus, which controls the presence of pungency, in 121 F2 individuals from a cross between 'ECW123R' and 'CM334', both of Capsicum annuum. We concluded that CS and C are tightly linked. Sequence analysis of the genes of four pungent and four non-pungent pepper lines showed that the non-pungent peppers had a 2,529 bp-deletion in the 5' upstream region of CS. We have developed molecular markers of the C locus to detect pungency at the seedling stage. Based on the deleted sequence, we developed five SCAR markers, two of them being codominant. These SCAR markers will be useful for easy, accurate, and early detection of non-pungent individuals in breeding programs.
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