International Journal of Plant Sciences

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Indentification of Genetic Divergence in Okra Genotypes [Abelmoschus esculentus (L.) Moench]


Affiliations
1 Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, India
2 Division of Vegetable Crops, Indian Institute of Horticultural Research, Hesaraghatta, Bengaluru, Karnataka, India
     

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Using Mahalonobis D2 statistic and Tocher method, 166 germplasm lines were grouped into 18 divergent clusters. Clustering pattern was not associated with geographical region of genotypes. Hence, Geographical separation may not be referred as index of genetic diversity. Yield per plant, Mean inter-node s length and nodes per plant contributed largely for total divergence, revealing ample scope for improvement of these traits. Maximum number of genotypes were congregated in cluster XVIII followed by cluster I. the highest inter cluster distance between cluster I and cluster XVIII emphasized the possibilities of getting high heterotic F1 hybrids as well as transgressive segregants in advanced generations for different traits , when hybridization is carried out involving genotypes between these two divergent clusters.

Keywords

Intra And Inter Clusters Distances, Intra And Inter Clusters Divergence And per Cent Contribution
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  • Indentification of Genetic Divergence in Okra Genotypes [Abelmoschus esculentus (L.) Moench]

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Authors

K. V. Vijaya Kumar
Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, India
K. T. Venkatesha
Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, India
M. Asif
Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, India
E. Gangappa
Department of Genetics and Plant Breeding, University of Agricultural Sciences, G.K.V.K., Bengaluru, Karnataka, India
M. Pitchai Muthu
Division of Vegetable Crops, Indian Institute of Horticultural Research, Hesaraghatta, Bengaluru, Karnataka, India

Abstract


Using Mahalonobis D2 statistic and Tocher method, 166 germplasm lines were grouped into 18 divergent clusters. Clustering pattern was not associated with geographical region of genotypes. Hence, Geographical separation may not be referred as index of genetic diversity. Yield per plant, Mean inter-node s length and nodes per plant contributed largely for total divergence, revealing ample scope for improvement of these traits. Maximum number of genotypes were congregated in cluster XVIII followed by cluster I. the highest inter cluster distance between cluster I and cluster XVIII emphasized the possibilities of getting high heterotic F1 hybrids as well as transgressive segregants in advanced generations for different traits , when hybridization is carried out involving genotypes between these two divergent clusters.

Keywords


Intra And Inter Clusters Distances, Intra And Inter Clusters Divergence And per Cent Contribution