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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(9): 2231-2237
DOI: https://doi.org/10.20546/ijcmas.2018.709.276


Genetic Divergence Studies in Tomato (Solanum lycopersicum L.)
Mahantesh Jogi, H.B. Lingaiah, K.M. Indiresh, T.H. Singh, D.K. Samuel and R.K. Ramachandra
Department of Vegetable Science, College of Horticulture Bengaluru, Karnataka – 560065, India
*Corresponding author
Abstract:

As the information, on the nature and magnitude of variability for yield and other characters present in germplasm pool owing to genetic and non-genetic causes, is an important basic pre-requisite for starting any systematic breeding programme to identify superior lines or varieties. Thus, this investigation was undertaken involving 200 genotypes of tomato (Solanum lycopersicum L.) with following objective as genetic divergence studies in tomato. Genetic diversity among 200 tomato genotypes was worked out using D2 statistics. On the basis of genetic distance, these genotypes were grouped in to 8 clusters. Cluster-I topped in having maximum of 177 genotypes followed by cluster-II having 17 genotypes while remaining clusters cluster III, IV and V, VI, VII, VIII included one genotype each. Clustering was mainly due to either geographical locations or due to genotype. The maximum intra-cluster distance was observed in Cluster-II (2965.87) followed by Clusters-I (2384.00) which were identified genetically divergent. The maximum inter-cluster distance was noticed between Cluster-VII and Cluster-VIII showed maximum inter cluster distance (37547.80) followed by that between cluster-V and cluster-VIII (25781.20). Among 13 characters included for D2 analysis, Number of fruits per plant contributed maximum to divergence followed by plant height and have a major role in improvement of fruit yield in tomato. Therefore, crossing between genotypes belonging to Cluster- I and II as well as between Cluster- VII and III are expected to give maximum heterosis.


Keywords: Tomato, Genetic divergence, Clusters and genotypes
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How to cite this article:

Mahantesh Jogi, H.B. Lingaiah, K.M. Indiresh, T.H. Singh, D.K. Samuel and Ramachandra, R.K. 2018. Genetic Divergence Studies in Tomato (Solanum lycopersicum L.).Int.J.Curr.Microbiol.App.Sci. 7(9): 2231-2237. doi: https://doi.org/10.20546/ijcmas.2018.709.276