Genetic Diversity Analysis of Protein and 10 Major Amino Acids of 227 Peanut Varieties(Lines)
In order to understand the genetic characteristics of protein and main amino acids in peanut kernels and provide theoretical bases for protein quality improvement,the contents of protein and 10 main ami-no acids of 227 peanut resources including bred varieties and landraces were determined using multifunctional near-infrared component analyzer,and diversity analysis,correlation analysis,cluster analysis and principal component analysis were carried out.The results showed that the variation coefficient of proline content was the highest in the 11 traits,which was more than 12%,followed by lysine content,which was more than 10%with the minimum value half of the maximum,and the values of other traits were less than 6%.The results of correlation analysis showed that protein content was significantly positively correlated with content of all the 10 amino acids;proline content was not significantly correlated with methionine and threonine contents,while negatively correlated with valine contents,significantly positively correlations were observed among other amino acid contents.The 227 varieties(lines)were divided into 3 categories through cluster analysis,and 10 varie-ties with high protein and amino acid contents were grouped in class I.The results of principal component anal-ysis showed that the cumulative contribution rate of the first three principal components was 84.32%,among which,the first principal component included non-polar amino acids such as isoleucine,leucine,phenylala-nine and arginine and protein had a contribution rate of nearly 60%,and 22 excellent varieties with compre-hensive traits were screened according to the comprehensive score.In conclusion,the 11 traits of protein and amino acid contents of the tested varieties(lines)were different to different degrees,and the genetic diversity was abundant,which could provide a theoretical basis for the improvement of peanut protein quality.
万方数据
维普
