Fig. 2.

Substitution mapping of QTLs for SER on chromosome 2. a The substitution segment of SSSL-A42 on chromosome 2. Physical distance (Mb) was shown under the chromosome. b Plant type of SSSL-A42 and HJX74, scale bar, 15 cm. c Substitution mapping based on the substitution segments of six SSSLs. d Secondary substitution mapping of QTLs based on the substitution segment of SSSL-A42. SER stigma exsertion rate. SER (%) was a mean ± S.E. in nine cropping seasons (c) and two cropping seasons (d). Different alphabet letters denote differences at 0.01 level of significance in Duncan test. White and black blocks on chromosomes represent genotypes of HJX74 and donor, respectively