Phenotypic distribution of grain-related traits in the population of 91 RILs derived from a cross between ‘Chamdongjin’ and ‘Younghojinmi’ across two years (A-D) and path analysis of the causal relationship among grain-related traits to explain 1,000-grain weight variation in 2022 (E) and 2023 (F). The blue and yellow curves and dashed lines represent the density plots and mean values of CY_RIL for the years 2022 and 2023, respectively. The blue and yellow inverted triangles represent the mean values of parents for the years 2022 and 2023, respectively. CDJ: Chamdongjin, YHJM: Younghojinmi. GL: grain length, GW: grain width, GT: grain thickness, TGW: 1,000-grain weight. Single-headed continuous arrows represent linear dependencies (direct effects) calculated as standardized regression coefficients, while double-headed dotted arrows indicate correlation coefficients between each traits. Blue arrows indicate positive effects. The arrow line thickness represents the proportion of the effect. ** indicates significant at 1% probability level.

Korean J. Breed. Sci. 2024;56:31-51 https://doi.org/10.9787/KJBS.2024.56.1.31

© 2024 Korean J. Breed. Sci.