甜高粱主要农艺性状相关性和主成分分析

Analysis on Correlation and Principal Component of Major Agronomic Trait of Sweet Sorghum

【目的】对新疆甜高粱2008年区域试验中10个品种的13个农艺性状间关系进行研究。【方法】采用相关分析及主成分分析。【结果】产糖量与生物产量、茎秆产量、茎粗、单株重、秆重呈极显著相关,与生育期、锤度、株高、秆长和节数呈正相关,但未达到显著程度,与籽粒产量、穗粒重和相关性很小,与千粒重呈负相关;主成分分析结果表明,前3个主成分的累积贡献率是88.47%。【结论】在性状选择上,应选择植株高大、节数多、茎杆粗壮、生育期适中和锤度高的品种。

[Objective and Method]The correlation and principal component of l3 agronomic characters of 10 sweet sorghum varieties of Xinjiang regional experiment in 2008 were analyzed.[Result]Correlation analysis indicated that there was a significantly positive correlation between sugar production and biological yield,stem yield,stem diameter,weight per plant of sweet sorghum.There was also a positive correlation among growth period,brix,plant height pole length,internode numbers,there are weak positive correlation with kernel weight and weight per spike,thousand kernel weight proved to be negative correlation.Principal component analysis showed that the first three principal components accounted for 88.47% accumulation contribution rate.[Conclusion]Among breeding sweet sorghum varieties,the excellent varieties with plant height,strong stem,more internode numbers and high brix and appropriate growth period should be choosen.