基于主成分分析的黄瓜新品种引进筛选综合评价

Comprehensive Evaluation of Introduction and Screening of New Cucumber Varieties Based on Principal Component Analysis

以天津市农业科学院黄瓜研究所的黄瓜新品种为试材,采用主成分分析方法,研究了黄瓜的生长指标、品质指标、光合指标、产量指标等21项指标对12个黄瓜新品种的影响,以期筛选出适宜石家庄地区种植的黄瓜新品种。结果表明:变异系数最大的是可溶性糖含量,为59.70%,株高、茎粗、叶面积、瓜条长度、瓜横径、可溶性固形物、胞间CO_(2)浓度、最大光化学效率的变异系数均较小,分别为8.44%、7.38%、9.65%、7.80%、4.87%、9.90%、3.92%、3.36%,均小于10%。对这21项农艺性状进行相关性分析,各性状至少与其它1个性状存在极显著或显著相关。产量与叶绿素相对含量呈极显著正相关,说明产量主要取决于光合作用。通过主成分分析,得到6个主成分,综合了83.825%的原始信息,前6个主成分的函数表达式及综合评价标准Y=0.29632Y_(1)+0.15639Y_(2)+0.14752Y_(3)+0.09509Y_(4)+0.08046Y_(5)+0.06246Y_(6),得到12个黄瓜品种的综合得分,品种10(‘津优186’)的得分最高,因此‘津优186’最适宜石家庄地区种植,为黄瓜种植者提供了天津黄瓜新品种引进的参考依据。

Taking the new cucumber varieties from the Cucumber Research Institute of Tianjin Academy of Agricultural Sciences as the test material,the principal component analysis method was used to study the comprehensive analysis method of the main agronomic characters of cucumber,and the growth index,quality index,photosynthetic index,yield of cucumber.The effects of 21 indicators on 12 new cucumber varieties were selected,in order to screen out new cucumber varieties suitable for planting in Shijiazhuang area.The results showed that the largest coefficient of variation was the soluble sugar content,which was 59.70%,plant height,stem diameter,leaf area,fruit length,fruit diameter,soluble solids,intercellular CO_(2)concentration,and fluorescence maximum were all small,8.44%,7.38%,9.65%,7.80%,4.87%,9.90%,3.92%,and 3.36%,respectively,all less than 10%.Correlation analysis of these 21 agronomic traits showed that each trait was extremely significantly or significantly correlated with at least 1 other trait.The yield and the chlorophyll content were extremely significantly positively correlated,indicating that the yield mainly depends on photosynthesis.Through principal component analysis,6 principal components were obtained,which synthesized 83.825%of the original information,the function expressions and comprehensive evaluation criteria of the first 6 principal components was Y=0.29632Y_(1)+0.15639Y_(2)+0.14752Y_(3)+0.09509Y_(4)+0.08046Y_(5)+0.06246Y_(6),the comprehensive score of the 12 cucumber varieties was obtained.Variety 10,that was‘Jinyou 186’,had the highest score.Therefore,‘Jinyou 186’was the most suitable variety for planting in Shijiazhuang area,and the result provided cucumber growers with a reference for the introduction of new varieties of Tianjin cucumber.