Fig. 2
Distribution of quantitative mode-of-inheritance quantitative trait loci (QTLs) for the yield and non-yield groups over 5 years. To correct for pleiotropism, a genomic area that influences multiple related traits (|r| > 0.5) and has an identical inheritance mode was regarded to be a single QTL. The features that were influenced by a specific area were regarded as vertices of the line in the graph, and the related features were linked by a line. In this hypothetical graph, each isolated cluster was regarded as a single QTL, and this method of pleiotropism correction relies on the threshold of the correlation coefficient (r). For example, the criterion that r = 1 is identical to classifying each feature as a QTL, regardless of the link between them, as the hypothetical graph features no connections (because the correlation cannot be >1); therefore, each trait can be regarded as an isolated cluster. Based on the relative position of the introgression line hybrids (ILHs) on the phenotypic interval between the two parents, which are the introgression lines (ILs) and TM-1, we can determine the quantitative index of the QTL. The region from −25 to +150 of the quantitative index of a QTL is represented by the x-axis, whereas the frequency of these indices is represented by the y-axis. The four curves indicate the distribution of increasing or decreasing QTLs for features in yield or non-yield groups. In other words, the quantitative index of QTLs identified as recessive is negative or positive up to approximately 33 (the first third in the interval of IL–TM-1). The indices of the additive QTL are relatively lower than 33 and higher than 66 (the second third), and those of the dominant are higher than 66 and may be greater than 100, whereas the ODO QTL must be higher than 100
