Fig. 1: Identification and characterization of qMIB2.

a Fruit phenotypes (left) and fruit weight (right) of Solanum lycopersicum var. cerasiforme LA1310 (CC) and S. lycopersicum Moneymaker (MM) under normal temperature (NT) and high temperature (HT) conditions in the field. Scale bars, 1 cm. b Inflorescence branch number of CC and MM under NT and HT conditions. c Ratio of inflorescence branch number for CC and MM plants between HT and NT conditions. d Fruit number per truss of CC and MM plants under NT and HT conditions. e Inflorescence phenotypes (left) and quantification (right) of inflorescence branch number of ST082 and MM plants. Scale bars, 1 cm. f Ratio of inflorescence branch number of ST082 and MM plants between HT and NT conditions. g Detailed view of the SNP ratio on chromosome 2. h Inflorescence branch number of near-isogenic lines (NILs) under NT and HT conditions. NIL-MIB2^ST082 and NIL-mib2^MM harbor the ST082 and Moneymaker (MM) genotypes at MIB2, respectively. i Fruit weight of the NILs under NT and HT conditions. j Allele frequencies of qMIB2 in accessions classified as S. pimpinellifolium accessions (PIM), S. lycopersicum var. cerasiforme accessions (CER), and big-fruited S. lycopersicum accessions (BIG). N, number of accessions. k Fruit weight of big-fruited S. lycopersicum accessions with qMIB2^ST082 or qmib2^MM. Data in (a, c, d, f, i, k) were compared by two-tailed Student’s t-test, **, p < 0.01; n.s. no significant difference (p > 0.05). Values in (a, d) are means ± SEM. Box edges in (c, f, i, k) represent the 0.25 and 0.75 quantiles, and the bold lines indicate median values. Whiskers indicate 1.5 times the interquartile range, the bar ranges the minimum to maximum observations. n in (a, c, d, f, i, k) = number of plants. N in (b, e, h, j) = number of inflorescences. Source data are provided as a Source Data file.