Genetic divergence Analysis in Groundnut (Arachis hypogaea L.)

Author: C. Suvarna, R.P. Vasanthi, K. Viswanath, C. Kiran Kumar Reddy and Y. Amaravathi

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Abstract

The present study was conducted to analyze genetic diversity among 45 groundnut genotypes for twenty two characters using Mahalanobis D2 statistics. Based on Tocher's method of clustering, 45 genotypes were grouped into eight clusters of which cluster I was the largest with 31 genotypes followed by cluster II with 8 genotypes. The inter cluster distance was maximum between cluster VII and VIII (22.25) followed by cluster V and VII (21.65) and cluster II and VI (20.68). Considering the cluster distance and cluster means, crossing between the genotypes of cluster VII and cluster VIII, cluster V and VII is suggested in order to get transgressive segregants for yield and yield traits. The character, number of pods plant-1 (30%) contributed maximum towards genetic diversity followed by hundred kernel weight (25.25%) and number of pegs plant-1 (13.4%).

Keywords

Cluster, D2 statistics, Genetic diversity, Groundnut

Conclusion

Based on inter cluster distances the clusters VII & VIII, V &VII and II &VI were found to be divergent in decreasing order of their magnitude. Hence, genotypes of these clusters could be utilized as parents and crossing among them would result in heterotic expression for yield components. Due to wide diversity between the genotypes, superior recombinants could be obtained by involving such genotypes as parents in hybridization programme.

References

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How to cite this article

C. Suvarna, R.P. Vasanthi, K. Viswanath, C. Kiran Kumar Reddy and Y. Amaravathi (2023). Genetic divergence Analysis in Groundnut (Arachis hypogaea L.). Biological Forum – An International Journal, 15(9): 237-243.