Extended Data Fig. 1: Changes in morphological traits during maize breeding in the United States and China.
From: Genome-wide selection and genetic improvement during modern maize breeding
a, Changes of 12 morphological traits during modern maize breeding in the United States and China. Different letters above the boxes indicate significant difference (p < 0.05, Bonferroni correction) in pairwise comparison. Note that days to anthesis (DTA, p = 0.015) and ear height (EH, p = 0.007) are significantly different between Public-US and Ex-PVP inbred lines as revealed by two-tailed t-test. b, Changes of four morphological traits in four subgroups (SS, NSS, HZS and Mixed) during modern maize breeding in the United States and China. Subgroups with at least 10 inbred lines in each US or Chinese era were used in the analysis. The x-axis represents the eras with prefixed sub-group names. The * or ** above the SS sub-group indicate the t-test results at significant level of 0.05 and 0.01, respectively.
