PJB-2019-833
Study of genetic variability, heritability and genetic advance for yield-related characters in tomato (Solanum Lycopersicon MILL.)
Adnan Rasheed
Abstract
The present study was planned to investigate the degree of genetic variation regarding yield-related traits in tomato. A total of 9 parents and fifteen hybrids were used in this experiment. Analysis of variance demonstrated a significant difference for all studied traits. As per findings GCV (genotypic coefficient of variability) as well as PCV (phenotypic coefficient of variability) (PCV) were documented higher for yield plant-1, number of fruits cluster-1, etc. which showed the presence of large genetic unevenness and scope of selection these characters. Estimates of heritability estimates were noticed higher for all parameters viz. No. of flowers cluster-1, single fruit weight and yield plant-1, etc. Genetic advance was found higher for single fruit weight SFW (single fruit weight) while highest genetic advance as % of mean coupled with higher heritability was recorded for yield plant-1 along with no. of fruits cluster-1 etc. Nagina x Continental was highest yielding hybrid (3kg) which could be further selected for varietal development. Current findings showed that gene action (additive) is present and hence selection of these traits in segregating generations founded on phenotypic superiority would be more fruitful for further development in tomato. Selection of the superior hybrids would be highly beneficial to increase indigenous seed production in Pakistan.
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