蚕豆种质资源光合作用效率相关性状多样性分析与综合评价OA

To deeply explore the genetic diversity and identify photosynthetic efficiency related traits in faba bean germplasm resources,213 accessions from domestic and international sources were evalu-ated in this study,and the photosynthetic efficiency related traits,including net photosynthetic rate(A),transpiration rate(E),stomatal conductance(GSW),intercellular CO2 concentration(Ci),rela-tive chlorophyll content(SPAD value),and leaf area,were analyzed by means of coefficient of varia-tion,genetic diversity index,principal component analysis and the membership function method.The results showed that the genetic diversity was high,with coefficients of variation ranging from 0.086 to 0.287 at the full flowering stage,and from 0.066 to 0.321 at pod setting stage.Among them,relative chlorophyll content showed the lowest variation,only 0.086 and 0.066,and the coefficient of variation of stomatal conductance was the largest,reaching 0.287 and 0.321,Shannon diversity index values ranged from 2.504 to 2.845,and from 2.058 to 3.004 at full flowering stage and pod setting stage,re-spectively.Principal component analysis indicated that four components explained 75.66%of the total variance,representing most of the trait information across the 213 germplasm accessions:Comprehen-sive evaluation and cluster analysis identified top 13 high-photosynthetic efficiency accessions:H0000912,H0000927,H0003874,H0000842,4061,H0000931,H0004532,H0000843,H0004238,H0005045,respectively.These accessions demonstrated strong potential for use as parental lines in high photosynthetic efficiency breeding programs.