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本文试用相关遗传力的分析方法，探讨了苎麻５个经济性状与产量和品质的相关遗传力，结果表明，通过各经济性状来间接选择单蔸产量和单纤维支数的相对效率不同，二麻各经济性状与单蔸产量和单纤维支数的表型相关变异中大部分是由遗传原因引起。相关遗传力的通径分析表明，苎麻高产和优质表现型之间存在较大的矛盾，主要由株高（二麻）、茎粗（三季麻）、鲜皮厚度（头麻和二麻）、鲜皮出麻率（头麻和三麻）、有效株率（二麻和三麻）引起，高产优质苎麻品种的选择应着重在二麻进行。
In this paper, we analyzed the heritability of five economic traits and the yield and quality of ramie by using the analysis methods of heritability. The results showed that the relative efficiency of the indirect yield and yield of single fiber was different through the economic traits. Most of the phenotypic variations associated with economic traits and monocots yield and monofilament count were caused by genetic causes. Path analysis of related heritability showed that there was a big contradiction between high yield and high quality phenotype of ramie, which mainly consisted of plant height (two flax), stem diameter (three flax), fresh skin thickness (first flax and two flax) Fresh husks rate (first and third), the effective plant rate (two and three Ma) caused by the high yield of high quality ramie varieties should be selected in the two Ma.