Fig. 2

Population structure and kinship analysis of 98 samples of Populs simowii. A The population structure of 98 samples. Each color represents a group. Each column represents a sample, and each colored part in each column represents the proportion of the contribution of the population to the samples. B The photosynthetic phenotypic dynamics under gradient light intensities of ETR, qP, and qN of different groups. C Box plots illustrating the values of the population structure disturbance term of ETR, along with the p-value for the median from the Kruskal-Wallis test, are presented in the figure. D Box plots illustrating the values of the population structure disturbance term of qP, along with the p-value for the median from the Kruskal-Wallis test, are presented in the figure. E Box plots illustrating the values of the population structure disturbance term of qN, along with the p-value for the median from the Kruskal-Wallis test, are presented in the figure. F Heatmaps of the correlation coefficient of kinship for 98 samples