Fig. 1
From: Fine mapping of the QTL cqSPDA2 for chlorophyll content in Brassica napus L.
Phenotypic frequency distribution of chlorophyll SPAD in the BC4F2 population. The lowest point of the column chart represents the dividing value (SPAD = 43). Leaves were considered to have high chlorophyll content(n = 1514) with a SPAD value≥43 and a low chlorophyll content(n = 547) with a SPAD value < 43. A chi-square test showed that the segregation pattern of the chlorophyll content trait was in keeping with the expected Mendelian segregation ratio of 3:1 (χ2 = 2.53)