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Genetic divergence studies in tomato [Solanum lycopersicum (Mill.) Wettsd.]

KrishiKosh

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Title Genetic divergence studies in tomato [Solanum lycopersicum (Mill.) Wettsd.]
 
Creator Nalla, Manoj Kumar
 
Contributor Rana, M.K.
 
Subject Fruits, Planting, Genotypes, Yields, Developmental stages, Vegetables, Genetics, Acidity, Biological phenomena, Phenotypes
 
Description A field experiment was conducted during spring-summer 2013 to study the genetic variability,
correlation, path coefficient analysis and genetic diversity for quantitative and qualitative traits in
tomato (Lycopersicon esculentum (Mill.) Wettsd.) With 27 genotypes including two checks in
randomized block design with three replications. Considerable amount of variability was noticed for
the 13 quantitative characters as indicated by the analysis of variance. Moderate to high GCV and
PCV, high heritability with high genetic advance observed for most of the yield attributing characters.
Fruit yield per plant had highly significant positive association with number of fruits per plant and
number of branches per plant, revealing that selection based on these traits would ultimately improve
the fruit yield. Path coefficient analysis revealed that number of trusses per plant, average fruit weight
and plant height had the highest positive direct effect on fruit yield at both the genotypic and
phenotypic levels.. High estimate GCV and PCV was recorded for number of locules per fruit, number
of fruits per truss and plant height. High heritability was noticed in characters like total soluble solids,
fruit yield per plant and number of fruits per plant. Genetic advance as percent of mean were recorded
very high for number of locules per fruit followed by number of fruits per truss, and number of trusses
per plant. Promising genotypes having high fruit yield are Saksham and DVRT 2 varieties and ascorbic
acid are EC 620378 and EC 620380. Hence, it would be rewarding to lay stress on these characters for
yield improvement. Mahalanobis D2 analysis revealed that among nine clusters maximum diversity was
observed between cluster VI and VII and maximum diversity within the cluster III. Fruit yield / plant,
total soluble solids and equatorial diameter observed the maximum contribution of characters towards
diversity. Selection of accessions from those clusters having high inter-cluster distance as parents in
the recombination breeding programmes is highly beneficial.
 
Date 2016-09-15T09:28:33Z
2016-09-15T09:28:33Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76790
 
Language en
 
Format application/pdf
 
Publisher CCSHAU