Molecular Diversity Analysis in Elite Tomato Genotypes (Solanum lycopersicum L.) for Fruit Quality

Author: M.P. Brijesh Patil, S. Shyamalamma, M. Amarnath and D.B. Santhosh

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Abstract

In the present investigation, twenty exotic and indigenous accessions of tomato along with the checks were screened for morphological, agronomic, biochemical, and molecular variability. The accessions with most favourable morphological characters identified were viz., EC-620545 (higher fruit weight-162.00 g/fruit and high fruit yield-8.24 kg/plant), EC-16786 (higher fruits/cluster-8), EC-159053 (high lycopene content-10.12 mg/100g), EC-168283 (high ascorbic acid content-18.07 mg/100g) and EC-151568 (high TSS- 8.08 °Brix). High genetic coefficient of variation with high heritability coupled with genetic advance over mean recorded for fruit weight, yield per plant, number of clusters per plant, number of fruits per cluster, fruit width, fruit length, TSS 0Brix, total solids, fruit firmness, and plant height. The molecular diversity was assessed and fifteen fruit quality-linked markers were polymorphic among accessions. EC-165690, EC-168283, EC-249514, EC- EC-249515, EC-320574-1, EC-362944, and EC-151568 belonged to the same clade and were rich sources for Ascorbic acid, TSS, and lycopene content. Among them EC-249515 (5.3 Kg/plant), EC-620545 (8.24 Kg/plant) and EC-620521 (7.64 Kg/plant) were significantly superior to Vaibhav. The accessions with better superior fruit qualities can utilized in the breeding program for creating variability and also for introgression of novel alleles into superior varieties.

Keywords

Genetic diversity, variability, correlation and molecular markers

Conclusion

In the present study, the exotic and indigenous collections had potential genes/alleles for both fruit quality and productivity. Many other wild species/ accessions need to be screened for quantitative and qualitative traits. The identified trait-specific accessions have the potential to accelerate trait-specific breeding for economically important traits without further evaluation, saving breeders time and resources. This investigation resulted in the identification of such potentially useful accessions for commercial tomato breeding

References

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How to cite this article

M.P. Brijesh Patil, S. Shyamalamma, M. Amarnath and D.B. Santhosh (2024). Molecular Diversity Analysis in Elite Tomato Genotypes (Solanum lycopersicum L.) for Fruit Quality. Biological Forum – An International Journal, 16(3): 30-34.