Characterization (Diversity Analysis) in Germplasm of Sesame (Sesamum indicum L.)

Author: Divya K.*, Shobha Rani T., Padmaja D. and Kiran Babu T.

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Abstract

Diversity reveals the presence of variability in nature which helps in identifying elite genotypes. In the present study, 133 sesame genotypes comprised of mutant breeding lines, indigenous lines, IVT’s, AVT’s, MLT’s, popular varieties and checks were evaluated for the genetic diversity. Considerable amount of diversity was found among the genotypes for all the ten characters studied and cluster analysis grouped the genotypes into nineteen distinct clusters. Cluster I was the largest with fifty-four genotypes and 13 clusters (V, VI, VII, VIII, X, XI, XII, XIII, XV, XVI, XVII, XVIII, XIX) were with one genotype each. The study also revealed that cluster XV has low estimate for phyllody (% incidence) and genotypes from this cluster can be used as donors in resistance breeding programme. The genotypes with specific traits could be selected and used in the crossing programme to improve the yield and disease resistance in sesame.

Keywords

Genetic diversity, D2- statistics, sesame, phyllody, mutant breeding lines and resistance breeding.

Conclusion

Genetic diversity has direct relation in creating variability through hybridization. The genotypes from diverse clusters like XIV & XV; XIV & XVIII having high inter-custer distances should be used rather than the genotypes of clusters having low divergence to create variability and to identify heterotic cross combinations for harvesting hybrid vigour, also for utilisation in the hybridization programme (Narayanan and Murugan., 2013). In breeding programmes, parents having high yield potential with wide genetic diversity are likely to yield superior transgressive segregants within short period (Maurya and Singh, 1977). Such genotypes can also be utilised in heterosis breeding to develop high yield recombinants (Mohanty et al., 2020). In addition, by using marker systems as a part of biotechnological tool efficiency in identifying the transgressive segregants or recombinants can be improved.

References

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How to cite this article

Divya K., Shobha Rani T., Padmaja D. and Kiran Babu T. (2022). Characterization (Diversity Analysis) in Germplasm of Sesame (Sesamum indicum L.). Biological Forum – An International Journal, 14(1): 204-209.