散穗高粱和红壳苏丹草杂交F2代群体农艺性状的相关和聚类分析

目的]探究高丹草主要农艺性状间的关系.方法]以散穗高粱(母本)和红壳苏丹草(父本)进行杂交后自交获得的F2代群体为材料,对该群体200个单株的9个主要农艺性状进行变异、相关和聚类分析.结果]各农艺性状间表现出明显的变异(10.00％～63.07％),总分蘖数和单株鲜穗重的变异系数最大,分别是63.07％、52.0...

Correlation and Cluster Analysis of Agronomic Traits of F;Population from the Cross Between Sorghum and Sudan Grass

Objective]The aim of this study was to explore the relationship among agronomical characteristics of Sorghum-Sudan hybrid grass.Method]The F;generation of the cross between sorghum(female parent)and the red Sudan grass(male parent)was analysed.The variation,correlation and cluster analysis of 9 main agronomic traits of 200 individual plants were analysed using different metods of data analysis.Result]The results showed that 200 individual plants showed obvious performance in all agronomic traits(10.00%-63.07%).The coefficient of variation of total tiller number and fresh ear weight plant was the largest,63.07% and 52.09% respectively.Correlation analysis showed that plant height had the greatest impact on fresh ear weight per plant(r=0.642),and the remaining characters were number of leaves(r=0.493),stem thickness(r=0.480),leaf length(r=0.410),leaf width(r=0.240).Cluster analysis divided the F₂ population material of Sorghum-Sudan hybrid grass at the Euclidean distance of 6.50 into four categories,the first category contains 124 F₂ populations per plant,and the overall mean value of each agronomic character was between the second and third categories.The third type had a small number,including only two single plants of F₂ generation population of Sorghum-Sudan hybrid grass,which were F₂-16 and F₂-145 respectively,the obvious characteristic was that the overall mean value of each agronomic character was the lowest.The second type had the highest plant height and the highest overall average value of various agronomic traits.They all had high stalks and high stalks.The characteristics of branches and leaves could be used to select high-quality forage grass.Conclusion]This study provided guidance for breeding good quality and high production performance varieties of Sorghum-Sudan hybrid grass,and provided a theoretical basis for cross breeding.