Fig. 1

The information of QTL for photosynthetic parameters and photosynthetic-related traits in previous QTL mapping studies used for meta-QTL analysis. (a) The time distribution of previous QTL mapping studies. The orange column shows a greater number of published studies, while the blue column indicates a lesser number of published studies. (b) The population type of pervious QTL mapping studies. (c) The proportion of QTL for photosynthetic parameters and photosynthetic-related traits. (d) The distribution of QTL on chromosomes