Analysis and comprehensive screening of genetic diversity of agronomic and quality traits of high generation millet lines
From 2022 to 2023,the agronomic traits and nutritional quality traits of 75 high-generation foxtail millet lines were determined,and genetic variation analysis was examined by genetic diversity analysis,fuzzy func-tion method,cluster analysis and principal component analysis.The results showed that the coefficient of variation of agronomic traits of millet was ear coarseness＞yield＞stem diameter＞spike length＞internodes under the pani-cle＞weight per spike＞leaf＞leaf length＞leaf width＞plant height＞growth period,with the coefficient of varia-tion ranged from 5.82％～16.07％,and the coefficient of variation of basic nutritional quality traits was fat content＞protein content＞fiber content＞ash content＞water content＞carbohydrate content,with the coefficient of varia-tion ranged from 1.27％～19.13％.The genetic diversity index was the largest in grain weight(2.09),the smallest in plant height(0.62)and carbohydrate(0.47).The largest annual variation was in panicle diameter(30.01％),and the smallest variation was in carbohydrates(1.27％).When the square euclidean distance was 15,the tested varieties are divided into five groups.Category Ⅰ included 27 strains,which had a short growth period and could be used as breeding materials for early-maturing varieties.Category Ⅱ included 4 strains,which had high plant height and leaf length,and could be used as hay fodder breeding materials.Category Ⅲ included 16 strains,which had high spike length,single spike weight and yield,and could be used as high-yield breeding materials.Category Ⅳincluded 13 strains,which were short in plant height,thick stems and long internodes under panicles,which could be used as lodging resistance breeding materials.Category V included 15 strains,which had low water and fat con-tent,high carbohydrate,and protein content,and could be used as high-quality nutritional breeding materials.The contribution rates of the six principal components were 19.524％,16.943％,13.893％,9.057％,8.626％and 6.074％,respectively,and the cumulative contribution rate was 74.117％.According to the score of principal compo-nent factor and membership function,five lines with good comprehensive traits were screened out,which were 19(Y35)-18-4,19(Y35)-18-6,19(T2)-42-2,19(J-5)-45-2,and 19(Y34)-17-35.In this study,the ge-netic variation of agronomic and basic nutritional quality traits of high-generation millet lines was analyzed,and the breeding materials with excellent comprehensive traits were screened,providing a scientific basis for the breeding of new millet varieties in western Henan.
万方数据
维普
