(A) Flowering time comparison among plants from different ploidy and hybrids among the three accessions. The 2n hybrid of Col-0 × Ler, Ler × C24, and Col-0 × C24 were produced by crossing the respective diploid parents. The 3n hybrid of Col-0 × Ler and Col-0 × C24 were recovered from the cross of 2n Col-0 with 4n male Ler and C24. 3n Col-0 was acquired by crossing 2n with 4n Col-0 plants. All the data are means ± SD, from left to right, n = 13, 13, 12, 19, 15, 9, 4, 8, 14, 3. (B) Triparental triploid plant recovered from three accession cross (TT3), Col-0, Ler and C24 at flowering end stage corresponding to 44 DAS for Col-0, Ler and C24, and 102 DAS for TT3. The number in parenthesis indicates the average DAS of flowering termination for each genotype. All the data are means ± SEM, (n = 3 independent experiments for Col-0, Ler, and C24, n = 2 for TT3). Scale bar, 10 cm.