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Figure 2 | Rice

Figure 2

From: Analysis of segregation distortion and its relationship to hybrid barriers in rice

Figure 2

Backcross population design to distinguish female meiotic drive from male-specific sources of distortion, and to distinguish gametic and zygotic differential selection mechanisms. Backcross populations were developed from F1 plants as female parents (1-4), or as male parents (5-8). Ilpumbyeo (black) and Dasanbyeo (red) genetic background are indicated. Smaller ovals indicate pollen on stigma and larger ovals indicate ovules. Pollen competition occurs only when the F1 is the male parent. Loci that exhibit distortion in male-segregating populations (5-8), but no distortion in the female-segregating populations (1-4) thus exhibited male-function- influenced segregation distortion (mSD). The embryo-sac effect on segregation distortion can occur only when the F1 is the female parent (1-4). Loci exhibiting deviation from expected Mendelian ratios in female-segregating populations but not in male-segregating populations thus exhibited female-function segregation distortion (fSD). Zygotic selection influencing segregation distortion is indicated by loci with distortion in both backcrosses (F1 as female and male parents).

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