苎麻主要经济性状与产量品质相关遗传力的通径分析

PATH ANALYSIS OF CORRELATED HERITABILITY OF BETWEET MAIN ECONOMIC CHARACTERS AND YIELD,AND QUALITY IN RAMIE

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。

The influence of phenotype of 5 main economic characters to yield and quality were evaluated through the analysis method ofcorrelated heritability in ramie varieties in the paper. The results are as follows;Opposite efficiency what yield per stool and fibre fineness were selected indirectly by per economic characters were different. The largely in phenotype correlated variation between economic characters nad yiled per stool,and fibre fineness are caused by heredity cause at second-MA in the year. The path analysis of correlated heritability showed that major contradiction lies phenotype of between high yield and superior quality of ramie. This contradiction are mainly caused by the influence of phenotype of plant height, stem diameter, bast thickness,fresh bast retio, effect stool retio. The selection of high yield and superior quality ramie varieties ought to go on do at second-MA in the year.