The introgression line population,which was generated via processing tomato parent Lycopersicon esculentum M82 and a wild species L. pennellii LA716,was employed in this paper to evaluate seven fruit traits using principal component and cluster analysis. The results showed that these seven fruit traits were mainly composed of three independent principal components,including fruit weight factor,fruit shape factor and fruit quality factor,and the cumulative contribution of these three factors was 85. 435%. Fu...