甘蓝型油菜数量性状的聚类和通径分析

The Quantitatve Character's Aggregation and Path Analysis of Brassica napus

通过对8个甘蓝型油菜品种的7个主要经济性状的相关、聚类和通径分析表明:油菜性状的表现主要受基因型制约,各性状之间都存在着一定的相关性,它们是1个有机整体,其中角果数、角粒数、千粒重3个因素的产量作用大,且1次有效分枝位,角果数与单株产量呈较大的正相关;而角果数则仅与一次有效分枝数成正相关。因此,油菜的选择育种和高产栽培,应在兼顾各性状相互协调的同时,主改单株有效角果数、千粒重、角粒数及单株一次有效分枝数。研究油菜数量性状间的相关性及其对产量的作用。并用统计学语言对之进行科学分类,可为科研和生产提供参考信息。

Through the seven main economic character's correlations, aggregatin and path analysis of eight varieties of Brassica napus, it shows that the character's phenotype of rape is mainly restricted by genotype, existing definite correlation between the various characters and it is an organic whole, the yield of rapeseeds depend on three factors of fruit-bearing number, grain number and 1000-seed weight,and once active branch position and fruit-bearing number are considerable Positive correlation with single plant yield; grain number is only Positive xorrelation with once active branch number. therefore, the selection breeding and high yielding cultivation of rape should coordinate various characters, and mainly attack single plant active fruit-bearing number, 1000-seed weight, grain number and single plant once active branch number. studying the correlation of rape quantitative characters and its effect to the yield, and carrying on scientific classify by means of statistical language, it can supply reference information for scientific research and production.