Genetic Diversity of Tartary Buckwheat (Fagopyrum Tataricum Gaertn.) Genotypes Based on Cluster And Principal Component Analyses in Organic Agriculture
Keywords:
<i>Fagopyrum</i>, variation, multivariateanalysis, micronutrients.Abstract
A total of 24 accessions of tartary buckwheat with some local germplasm were analyzed by cluster and principal component using 17 quantitative characters to group them on the similarity at phenotypic level, and to identify the most relevant characters in explaining the variation. The genotypic variance of all the traits was lower than the phenotypic variance. Highest GCV and PCV were recorded for seed yield per plant, seed per plant and protein content. The non-hierarchical Euclidean cluster analysis using Mahalanobis statistic, grouped the genotypes into five distinct clusters among which two clusters were polygenotypic and three clusters were monogenotypic. Cluster I was the largest group comprising of 15 genotypes characterized with highest primary branch per plant, inflorescence length, leaf per plant, seed per plant, seed yield per plant, magnesium content, iron content and zinc content. Most of the high yielding germplasm along with Himpriya were grouped under this cluster. Cluster II composed of the genotypes having high amount of protein, calcium and phosphorus that can be used as a source for introgression of genes responsible for high nutrition. The results of PCA confirmed the findings of cluster analysis. Six principal components having eigen value greater than one, accounted for nearly 78.58% of the total variation. According to eigen vector analysis, the observed variation for first, second, third, fourth, fifth and sixth principal component were about 26%, 15%, 12%, 10%, 8% and 6%, respectively. In the first principal component, number of seed per plant and seed yield per plant were the most contributing traits whereas days to maturity, calcium and iron were the principal traits of the second principal component.Downloads
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