Title: Genetic Variability and Character Association Analysis in Tomato
Abstract: Genetic variability, heritability (h2), genetic advance, character association and path analysis were carried out in 17 accessions of tomato (Solallum tycopersicllnl Mill.) during 2000–2001. Significant genotypic differences were observed for all characters under study as indicated by the high genotypic eocfticient of variation for number of fruits per plant, average fruit weight, number of locules per fruit, acidity percentage. length of fruits and yield of fruits per plant. The characters with high genotypic coefficient of variation had also high heritabilities. This indicates the possibility of genetic improvements for such traits through selection based on phenotype. Association studies indicated that the yield of fruits per plant positively correlated with plant height. number of branches per plant. number of fruits per plant. average fruit weight, fruit length, number of locules, TSS and ascorbic acid content. Pericarp thickness and acidity percentage are negatively correlated with yield. Path cocfficient analysis revealed that plant height. number of branches per plant, width of fruit, number of fruits per plant and average fruit weight exhibited the maximum positive direct effect on yield. Thus an increase in selection on these traits may lead to an over all increase in the yield. Quality traits except pericarp thickness and TSS did not play any signiticant dircct and indirect role. Therefore, a genetic improvement of yield can be initiated by putting positive selection pressure on plant height, number of branches per plant, width of fruit, number of fruits per plant and average fruit weight.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
Access and Citation
Cited By Count: 10
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