Genetic Resource Evaluation Of The Magnoliaceae Species And Cultivar Breeding Of Michelia Chapensis Dandy

Following the strategy of exploiting native tree species resource, breeding and supplying more cultivars for the ecological environment construction and industrial development in forestry, the introduction results and utilization potential of the Magnoliaceae species in eastern China have been analyzed in this paper based on systematical investigation of long-term collection and conservation of the species. Been taken as a prior species for research and development, the genetic diversity pattern of natural populations of Michelia chapensis Dandy has been studied and the breeding methods been groped by means of conventional ways and DNA molecular assistant genetic analyzing methods. And with the innovation of ornamental cultivars as the main goals, crossbreeding and selection breeding have been done and some cultivars been selected, the supporting measures of asexual mass propagation for cultivars have also been developed. The main results of the research are as following:1. Magnoliaceae species are the important constituents of Chinese forest resources, but not being highly valued yet except a few traditional ornamental used and Chinese medicine species. The species resources, their developing values, and the endangering conditions of the family in China have been analyzed in the paper, and it's concluded that many species in natural forests are in endangering state due to the loss of their biological and ecological habitats, and what's more to the point is the over-harvesting of the natural resources. It's suggested that the Magnoliaceae species should be highly valued for their economic use as ornamental, medicinal, perfume plants, and also as the trees suitable for plywood and pulping, and the fair tactics are to exploit the genetic resource and cultivate plantations to satisfy the mankind needs by which in turn relieve the pressure on natural resources.2. The survival and growth status of the introduced Magnoliaceae species in Fuyang, Zhejiang have been evaluated. Among the 70 species, 36 are in good state, mainly from the eastern areas of central and north subtropical regions, including that of Magnolia,...