Breeding system
The GLM analysis showed that pollination treatments have significant
influences on fruit set (Wald χ2 = 9.348, df = 3, P =
0.009) and seed set (Wald χ2 = 22.018, df = 3, P
< 0.001) (Fig. 3). Under natural conditions, the fruit set and
seed set were
65
± 7.6 % (N = 40) and 80.4 ± 2.6 % (N = 26) respectively, which were
significantly lower than hand self-pollination (87.5 ± 5.3 %,
N
= 40, P = 0.004, and 90 ± 0.9 %, N = 35, P <
0.001, respectively) and cross-pollination (85 ± 5.7 %, N = 40,P = 0.014, and 87.3 ± 1 %, N = 34, P = 0.002,
respectively). It suggested that there was a pollen limitation under
natural conditions. There was no significant difference in the fruit set
between self-pollination and cross-pollination, indicating that H.
mutabilis is highly self-compatible (Fig. 3). The fruit set of bagged
flowers was zero (N = 40), which indicated that neither spontaneous
autogamy nor apomixis occurs in this species.