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Isolation of three dormancy QTLs as Mendelian factors in rice

X-Y Gu, S F Kianian and M E Foley

Figure 1.

Graphic genotypes for chromosomes 1, 7, and 12 of BC₄F₂ plant ^#51. Empty or solid bars denote the EM93-1- or SS18-2-derived chromosomes or chromosomal segments, respectively, which were determined by rice microsatellite (RM) markers at the tick mark positions on the framework linkage map (Gu et al, 2004); chromosomes not shown were identical to EM93-1. QTLs for seed dormancy (qSD) are placed to the left of segments.

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Figure 2.

Frequency distribution of the BC₄F₃ population for percentage germination at 10 (), 30 (open columns), and 50 ( circle ) days of afterripening (DAR). Sample size (N), and proportion of the phenotypic variance explained by qSD7-1 and qSD12 (R ²) are shown in parentheses.

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Figure 3.

Distribution of germination at 7 or 14 days of afterripening (DAR) for populations segregating for qSD1 (a), qSD7-1 (b), and qSD12 (c). The bars depicted genotypes for the marker nearest a QTL. RM220 and RM270 are codominant markers, and Rc is a dominant marker gene for red pericarp/testa color.

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Table 1 - Dormancy allele flanking regions and germination of the selected BC₄F₃ plants.

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Table 2 - Variables retained by multiple linear regression analysis based on the BC₄F₃ population^a .

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Table 3 - Genic effects of dormancy QTLs on germination at different days of afterripening (DAR) based on the BC₄F₄ populations segregating for individual loci.

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FIGURES AND TABLES

Isolation of three dormancy QTLs as Mendelian factors in rice

Figure 1.

Figure 2.

Figure 3.

Table 1 - Dormancy allele flanking regions and germination of the selected BC4F3 plants.

Table 2 - Variables retained by multiple linear regression analysis based on the BC4F3 populationa .

Table 3 - Genic effects of dormancy QTLs on germination at different days of afterripening (DAR) based on the BC4F4 populations segregating for individual loci.

Table 1 - Dormancy allele flanking regions and germination of the selected BC₄F₃ plants.

Table 2 - Variables retained by multiple linear regression analysis based on the BC₄F₃ population^a .

Table 3 - Genic effects of dormancy QTLs on germination at different days of afterripening (DAR) based on the BC₄F₄ populations segregating for individual loci.