马铃薯无性一代植株性状相关及通径分析

本文对马铃薯30个杂交组合无性一代的14个性状与单株产量的相关关系作了估算,其中无效生育期、播后74天和92天冠层覆盖度、平均冠层覆盖度、最高冠层覆盖度、有效生育期、单株块茎数、单块重8个性状与单株产量的相关性达显著或极显著水平。进而对影响单株产量(y)的平均冠层覆盖度(x_1),有效生育期(x_2)、单株块茎数(x_3)、单个块茎重(x_4)进行通径分析。结果表明,该4个性状决定单株产量变异的94.61％,说明这4个性状是影响单株产量的决定因素。

CORRELATION AND PATH ANALYSIS OF MAIN CHARACTERS IN FIRST VEGETATIVE GENERATION OF POTATO

The correlation coefficients between 14 characters and yield per plant in the first vegetative generation of 30 cross combinations of potatoes were calculated. These were 8 of them that were significantly or very significantly related to yield. They are growth durations from planting and emergence to maturity, canopy covers of 74 and 92 days after emergence, average canopy cover, maximum canopy cover, number of tubers per plant, and mean tuber weight. In addition, path analysis was made including the characters that influence tuber yield per plant(y), canopy cover(x_1), growth duration from emergence to maturity (x_2), number of tubers per plant (x_3), and mean tuber weight (x_4). The results showed that the variation in yield per plant was mainly determined by these charactcrs(94.61%), indicating that they are the main factors controlling tuber yield per plant.