本试验得出半枫荷遗传变异主要存在于种群内部（76.41%），种群间（2

The test results Pterospermum genetic variation within populations exist in (76.41%), among the smaller contribution (24.59%) of the role of genetic variation. Conclusions The results of the same family with Pterospermum Loropetalum subcordatum (72% of the variation among the population), Sinowilsonia henryi (66.39% of the variation among the population) and Disanthus cercidifolius (75.34% of the variation among the population) inconsistent, described Pterospermum genetic variation within populations are more abundant, with a wealth of development and utilization of genetic resources. Data analysis SRAP markers Pterospermum genetic structure, Fst value was obtained 0.246, indicating a higher level of differentiation within its genetic basis. Plant breeding is the decisive factor in determining the type of genetic variation patterns of plant populations. Outcrossing species genetic differentiation coefficient of the mean Fst = 0.19, while selfing species genetic differentiation coefficient of the mean Fst = 0.4140, combined with our field survey found that most Pterospermum low seed, we hypothesized Pterospermum is self-incompatible affinity. This indicates Pterospermum likely to belong to outcrossing breeding system, which is outside the industry survey found that the majority of Altingia low seed conclusions coincide. Jeremia other study found that endangered plant, due to genetic drift, self-incompatibility locus could mutate lost, converted to self-compatible. Schmitt, who studied the same family of North American sweetgum self-sterility characteristics, derived from the intersection leading to greatly reduce the number of seeds in the fruit. Therefore, we hypothesized that part of Altingia low seed is most likely due to the higher rate of self-induced.

In this experiment, it was concluded that the genetic variation of semi-maple load was mainly present within the population (76.41%), and the genetic variation between populations (24.59%) contributed less. This result was with The Loropetalum subcordatum (72 per cent of the variation from among populations), Sinowilsonia Henryi (66.39 per cent of the variation from among populations) and Disanthus cercidifolius (75.34) The inconsistency of the %of variation comes from populations) and indicates that the genetic variation in the semi-maple population is rich and has a wealth of exploitable genetic resources. Based on SRAP molecular marker data analysis, the fst value was 0.246, indicating that the level of genetic differentiation in the population was high. The type of plant breeding is the decisive factor that determines the pattern of genetic variation of plant population. The average genetic differentiation coefficient of heterogeneous species is Fst s 0.19, while the average genetic differentiation coefficient of self-intersecting species, Fst , is 0.4140, combined with our field survey finding that most semi-maple loads have low robustness, so we speculate that semi-maple load is self-indecency dissomuch. This suggests that semi-maple load is likely to be an interdiplomatic-based breeding system, which is consistent with the conclusion that the field survey found that the half-maple lot is mostly strong. Studies such as Jeremia found that endangered plants, due to genetic drift, may be lost in self-deprecent and sites, turning into self-promisus. Schmitt et al. studied the self-cultivation characteristics of the North American maple incense, and concluded that self-efriending would lead to a significant reduction in the number of seeds in the fruit. We therefore speculate that some of the low maple load robustness rate is most likely due to higher self-eaming rates.

The results showed that the genetic variation of Schizophyllum Schizophyllum mainly existed in the population (76.41%), and the contribution of genetic variation among populations (24.59%) was small. This result is not consistent with the conclusion of Loropetalum subcordatum (72% variation from population to population), Sinowilsonia henryi (66.39% variation from population to population) and Disanthus cercidifolius (75.34% variation from population to population), which indicates that the genetic variation in the population is relatively rich and has relatively rich genetic resources for development and utilization. Based on SRAP molecular marker data, the genetic structure of schizophrenic schizophrenic schizophrenic schizophrenic was analyzed, and the FST value was 0.246, which indicated that the genetic differentiation level of schizophrenic schizophrenic schizophrenic schizophrenic schizophrenic was high. The type of plant breeding is the decisive factor to determine the genetic variation pattern of plant population. The average value of genetic differentiation coefficient of heterozygous species is FST = 0.19, while the average value of genetic differentiation coefficient of self cross species is FST = 0.4140. Combined with our field investigation, it is found that the seed setting rate of most half maple is low, so we speculate that half maple is self incompatible. This indicated that the half Maple lotus probably belonged to the heterozygous breeding system, which was consistent with the conclusion that most of the seed setting rate of half Maple lotus was low. Jeremia et al. Found that in endangered plants, due to genetic drift, self incompatibility sites may lose variation and become self compatible. Schmitt et al. Studied the self sterile characteristics of maples in the same family, and concluded that self intersection resulted in a significant reduction in the number of seeds in the fruit. Therefore, we speculate that the low seed setting rate of some half maple is probably due to the high self pollination rate.<br>