Fig 6. Relationship between days to heading and genotypes of WPCL1 and Vrn-1 loci in an F₂ population derived from ‘Geurumil’ and ‘Minaminokomugi’.

(a) Comparison of days to heading between genotypes of WPCL1 homoeoloci in the 489 F₂ plants. Days to heading indicate the number of days after April 1. Arrows show the heading date in ‘Chogokuwase’ (C), ‘Geurumil’ (G) and ‘Minaminokomugi’ (M), respectively. White boxes indicate the plants carrying homozygous wpcl1 alleles at three homoeoloci. Black boxes show the plants carrying functional WPCL-B1 and/or WPCL-D1 alleles. (b) A subset of the segregating population having the triple recessive wpcl1 alleles. Comparison of days to heading between genotypes of the Vrn-D1 locus in 25 F₂ plants with three loss-of-function wpcl1 homoeoalleles.