CHEN Daqing，DAI Yunhua1MAO Lianzhen，SUN Hao，ZHOU Yao，LIU Zhoubin
Abatract：Recombiant inbred line（RIL）was constructed by combination between pod pepper D71and sweet pepper D72．This paper measured 9 characters of RIL population，including single fruit weight，fruit length，fruit shoulder width，fruit width，fruit hardness，pulp thickness，fruit stalk thickness，leafwidth and leaf length under 2 different growing environments and also analyzed their genetic rules．The resultsshowed that under 2 habitats the absolute values of skewness coefficient and kurtosis coefficient of majoritytraits were less than 1，indicating these traits had typical quantitative characteristics，and each population trait was affected by polygenic control．The average value of variation coefficient of each trait ranged from 16.73%-52.06%，in which the average value of variation coefficient of single fruit weight was the largest，being52.06%，while that of leaf length was minimum，only 16.73%．The range of heritability of population traitswas 42.03%-51.21%，of which there were significant or extremely significant positive correlations among manyfruit traits. While，there were significant or extremely significant negative correlations between fruit hardnessand the other traits．Under different growing environments，population trait expression under E1 was betterthan under E2. Analysis of variation phenomenon indicated that there was abundant genetic variation within thisRIL population．Heritability analysis showed that the fruit traits of pepper were influenced by the combinationeffect of genotype and environment type，and the influence of environment type was slightly higher than thatof genotype．The distribution of various characters of RIL population under these 2 growth environments allpresented normal or approximately normal. These characters were typical quantitative trait inheritance．Theabove results can provide reference for selective breeding of new pepper varieties．
