Characterisation of tomato (Solanum lycopersiconMill.) genotypes for morphological and disease resistance traits through cluster analysis.

Abstract

The characterisation of germplasm is very important for the seed material (breeding) and development of improved varieties. The seed material is collected from the M/s. Noble Seeds Pvt. Ltd., Yelhanka few of them are resistant to ToLCV, where Ty gene background is inserted, five genotypes are non-resistant to ToLCV and one check ArkaVikas (susceptible to ToLCV) conducted the research at Kestur Village Doddballapura during Kharif, 2021 and Kharif, 2022. The genotypes were morphologically characterised according to DUS guidelines(PPV&FRA). The 20 qualitative and 22 quantitative traits were characterised, out of which 25 traits were observed with variations. Multivariate cluster analysis were assessed for which two clusters (A and B) were formed and for each two, two more sub-clusters (C and D) were observed. The 66.67 % of 30 genotypes (20) are clustered under the Cluster E (15 genotypes), 5 genotypes are considered under the Cluster C, 3 genotypes under the Cluster D and only 2 genotypes are classified under F cluster. The distance in terms of variations is high between the NBLTM-22 and NBLTM-11. And nearing the distance closer and less variations are observed. By this we can say that minimum the distance between the clusters maximum of similarity between the genotypes for the traits.