GmMYB73 overexpression controls seed size and thousand-seed weight of transgenic Arabidopsis plants. (a) Morphology of Arabidopsis seeds under scanning electron microscope. Seeds from GmMYB73-overexpressing Arabidopsis plants (OE), gl2-2, try cpc and try cpc/GmMYB73 lines were used. (b) Comparison of seed length from various plant seeds. Error bars indicate SD (n = 20 ~ 30). The values from try cpc/GmMYB73 line are only compared with those from the try cpc mutant. ‘**’ and ‘*’ above the columns indicate a significant difference from Col-0 or between the compared pairs at P < 0.01 and P < 0.05, respectively. (c) Comparison of seed width from various A. thaliana lines. Others are as in (b). (d) Comparison of the ratio of seed length to seed width. Others are as in (b). (e) Comparison of thousand-seed weight in various A. thaliana lines. Error bars indicate SD (n = 4). Others are as in (b).