fruit yield and pungency. Kaladee (1988) illustrated that overdominance or heterosis of hybrids was due to the heterozygosity of self pollinated crops. Differences in measurement methods of capsaicin gave different results. Anan’s method showed that Bang-Chang variety had the highest pungancy level while Human bite test showed that Fang variety had the highest level. Difference in the results might be caused by age of pepper fruit at picking time or variation of capsaicin in each variety. From hybridization of pepper variety, it can conclude that pungency is controlled by a group of dominant genes. Environment can modify