Establishment of Saccharum spontaneum L. Core Collections Factor and Cluster Analysis of Yunnan Innovated Germplasm Materials F1 of Spontaneum Effects of Enhanced UV-B Radiation on Chlorophyll Content of Wild Sugarcane (Saccharum spontaneum L.) Clones for Two Consecutive Years Genetic Diversity of Decaploid Saccharum spontaneum L.in China According to Functional Markers Related Stress Tolerance Identification and Genetic Analysis of Hybrid from Cross between Erianthus arundinacius (Retz.) Jesws. and Saccharum spontaneum L.