Journal of Innovative Research in Engineering Sciences

Issn:2476-7611

Article

Application of multivariate analysis in study of genetic diversity of greenhouse cucumber segregating populations

Mahnaz Taheri
Abstract

In order to study the genetic diversity associated with total fruit yield and the morphological traits on the average of two cucumber segregating populations of S2 and S3, a greenhouse experiment was conducted as the augmented design in the form of randomized complete block with three replications. Based on the cluster analysis results on the average families of S2 population, the genotypes were classified into five groups. The results showed that the genotypes of the first group were considered in terms of precocity. Other groups showed high values in terms of morphological traits and relevant traits to fruit yield and number of fruit in total harvest period. Based on the results of cluster analysis in the average S3 population, the genotypes were classified into four groups. The first group showed a decrease in all traits, except for the number of nodes, number of leaves, fruit diameter, and total average number and weight of fruit in the middle of the growth period. The remaining groups showed a small amount for morphological traits, but for the remaining traits they showed high values. Based on the results of factor analysis in S2 population, the first five factors had the greatest effect on genetic diversity. According to the contribution and importance, the factors can be designated as the yield and number of fruit during the growth period, latent factor of yield and number of fruits in the early growth period, leaf and stem characteristics of plant, latent factor of node ability in formation of leaf and fruit, and fruit quality. Based on the results of factor analysis in S3 population, the six first factors had the greatest effect on genetic diversity. According to the contribution and importance, the factors can be designated as the yield and number of fruits in the middle of growth, average yield and number of fruits at the end of growth period, plant height, leaf characteristics, fruiting level in the node, and the average length of internode. In total, it was found that there is a similar diversity in both generations.

Published on the web: 2018-12-29
Received : 2018-10-16
Submitting : 2018-09-20
Keywords
Keyword:1- Cucumber
Keyword:2- average of two segregating populations
Keyword:3- cluster analysis
Keyword:4- factor analysis

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