Associations between the number of pollen grains per anther and MS-P1.

The number of pollen grains per anther is examined in ‘Okitsu No. 46’ × ‘Okitsu No. 56’ (O46-O56) population and it is based on the average for three years. (A) Associations between the number of pollen grains per anther and the alleles of TSRF161 and GSR5112. Average of the number of pollen grains per anther in 8–17 seedlings is shown. (B) Enlarged genetic linkage map of O46-O56 near MS-P1. The loci with the highest logarithm of the odds score within the range of MS-P1 and the flanking markers are shown. The alleles linked with MS-P1 and ms-p1 are shown on the right side and left side of LG8, respectively. (C) Selection efficacy of the MS-P1 haplotype block in the O46-O56 population. MS-P1/ms-p1 shows individuals with both “254” allele at TSRF161 and “227” allele at GSR5112 (n = 15). ms-p1/ms-p1 indicates individuals without both the “254” and the “227” allele (n = 8). MS-P1 and ms-p1 indicate a quantitative trait locus (QTL) for the number of pollen grains per anther. Underlines indicate alleles linked with MS-P1 and derived from ‘Okitsu No. 46’. Bars indicate standard deviation. Asterisks (** and ***) show significance levels at p < 0.05 and 0.01, respectively.