高粱杂交种茎叶产量与能源品质性状相关性分析

Correlations between yield and energy-related quality traits of sorghum hybrids stems and leaves

为分析能源高粱杂交种茎叶产量与品质性状之间相关关系,以96份能源高粱杂交种为材料,采用完全随机区组设计,在华北平原自然环境差异较大的2个试点地区栽培,测定茎和叶产量及7个茎叶中与能源相关成分含量。结果表明,能源高粱杂交种能源相关性状变异系数在山西省介休市和河北省涿州市分别为3.7%~61.3%和4.8%~60.0%。其中,茎叶产量和理论乙醇产量的变异系数最大,主要归因于2个试点较大的环境差异。茎产量和叶产量极显著正相关,茎和叶的理论乙醇产量极显著正相关,茎叶之间绝大多数品质性状均呈正相关,说明可协同提高茎叶产量和品质以实现较大的理论乙醇产量。所有研究的性状在介休市和涿州市均可归类为4个主成分。在2个试点,排在前面的主成分均为秸秆产量和茎碳水化合物因子。因此,能源高粱育种应重点关注秸秆产量和茎碳水化合物因子。

In order to analyze the correlations between yield and energy-related quality traits of stems and leaves,96 energy sorghum hybrids were taken as study object.Field experiments in complete random block design were conducted in two sites with distinct differences in environmental condition in North China.The coefficients of variation in the measured traits of the 96 hybrids ranged between 3.7%-61.3% and 4.8%-60.0%in Jiexiu and Zhuozhou,respectively.The coefficient of variation of stem and leaf yield and theoretical ethanol yield were the largest among the studied traits.The stem yield and leaf yield were positively correlated.Concerning the same energy-related quality traits,the majority of those traits were positively correlated,and the theoretical ethanol yield of stem and leaf were positively correlated.It indicates that yield and quality traits stem and leaf can be simultaneously improved to achieve high theoretical ethanol yield.The measured traits can be compressed into four principal components in both sites.The first two principal components are straw yield factor and stem carbohydrate factor in Jiexiu and Zhuozhou site.Overall,the straw yield factor and stem carbohydrate factor are the favorable traits that should be paid more attention to.