Studies On Fiber Yield's And Oil Yield's Selection Methods Of Ramie For Oil-Fiber Dual-Purpose

In this study, five genotypes of Ramie for oil-fiber dual-purpose were used as materials. Thirty agronomic characters were mensurated to study the effects of different growth circles on agronomic characters of the genotypes, correlation and path coefficient of thoses characters, and to study the effects of different selection methods, including direct selection, genetic correlated selection and index selection methods.Main results are as follows:(1) The effects of different growth circles on agronomic characters. All characters of all the genotypes were affected by different growth circle. Except two characters, the effects of growth circle on the rest reach significant or the most significant level.(2) The selection effects of three selection methods. To oil yield, the genetic progress of index selection is higher than that of genetic correlated selection and direct selection; to fiber yield, the genetic progress of ndex selection is higher than that of direct selection and index selection.(3) Analyses of path coefficients. To oil yield, the contributions of seven characters to oil yield were ordered as scape length, density coefficient, net weight percent, potent stalk, oil content, seed bulk coefficient, and anthotaxy length; to fiber yield, the contributions of five characters to fiber yield were ordered as fiber yield percent of fresh stalk, tegument thickness, potent stalk, stalk height, stalk diameter.