Yuan Jichao

Effects of nitrogen rate and transplanting density on physical and chemical characteristics and lodging resistance of culms in hybrid rice.

Stylosanthes Sw.is the most important and commercial forage legume in tropical area around the world.However,Stylo anthraxcnose caused by Colletotrichum gloeosporioides had been a global severe disease in Stylo production since 1970s.The objective of this research was to evaluate the synthetic value of 85 stylo strains from space flight based on the comprehensive evaluation index calculated from 7 indices and their contribution rates using multi-objective decision methods,e.g.Residual Value Weighting Algorithm(REVAWEA),Simple Additive Weighting Algorithm(SAVA),and Technique for Order Preference by Similarity to Ideal Solution(TOPSIS),and the assembly technology.The results show that,among the 85 strains,the synthetic values of 2001-71,2001-28,2001-15,2001-24,and 2001-2 were best;those of 2001-22,2001-82,2001-57,and 2001-18 medium,while those of 2001-50,2001-85,2001-32,and 2001-78 were worst.According to clustering map obtained by the combination of multi-objective evaluation result and one-dimensional sequence clustering,new stylo accessions would be selected and bred to replace their parents,Stylosanthes guianensis cv.Reyan No.2 and be applied broadly in practice.