Scatterplot of Principal components (PC) 1 (62.3%) and PC 2 (31.8%) based on 12 quantitative traits of 120 F₂ plants derived from the cross of Jeonju686 and JJ621MR. When PCA and K-means clustering were performed, 120 F₂ plants were mixed and not clearly distinguished. CL: Culm length, PL: Panicle length, NT: Number of tillers, NS: Number of spikelets, NR: Number of rachis-branches per panicle, NPr: Number of RPBs per panicle, NSPr: Number of spikelets on PRBs per panicle, MNSPr: Mean number of spikelets on a PRB, NSr: Number of SRBs per panicle, NSSr: Number of spikelets on SRBs per panicle, MNSSr: Mean number of spikelets on a SRB, SrPr: Ratio of SRBs to PRBs, SSrSPr: Ratio of spikelets on SRBs to spikelets on PRBs, NA: Number of abortive grains, NAPr: Number of abortive grains on PRBs per panicle, NSSAPr: Number of abortive grains on SRBs per panicle, FR: Fertile rate.

Korean J. Breed. Sci. 2024;56:381-94 https://doi.org/10.9787/KJBS.2024.56.4.381

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