3.2 | Evaluation of pollen fertility and seed set
The fertility, including pollen fertility and seed set, ofR. stricta , R. turczaninovii and putative hybrids were shown in Figure 3. In R. stricta , the pollen fertilities were up to 92.05% and the seed sets were 90.02%. In R. turczaninovii , the pollen fertilities and seed set were high with 91.61% and 92.18%, respectively.
As for the hybrids RH1, the pollen fertilities varied from 1.01%-8.09%, and the seed sets were lower than those of their possible parents, varying from 0.41%-4.50% (Figure 3). As for the hybrids RH2, the pollen fertilities varied from 0.83%-13.63%, and seed set were lower, varying from 0.23%-5.59% (Figure 3). It could be seen that the pollen fertilities and seed sets of putative hybrids were very low, indicating that they were hybrids and not stable species.