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Self-incompatibility tests and backcross compatibility results for three Senecio squalidus progenies derived from backcrosses between a recessive S phenotype B4 × O19 progeny (BO8) and its B4 and O19 parents and an S1 phenotype B4 × O19 progeny (BO5) and its O19 parent. The S genotypes of BO8 and BO5 were subsequently identified as S1S6, and S1Srec, on the basis of these backcross results respectively. Labels and diallels follow the same scheme as Figure 3.
