Determination of Genetic Diversity in Morphological Traits of Mango Genotypes Using D2 Statistics | Chapter 8 | New Visions in Biological Science Vol. 6

 Using D2 statistics, an experiment was undertaken in mango genotypes from India's eastern tropical area between 2018 and 2020 to explore genetic diversity in 24 morphological features. The goal of the study is to figure out how much variability there is across mango genotypes, so that high genetic divergence between parents can be used in the breeding programme. The clustering pattern based on D2 statistics divided 40 genotypes of mango into seven clusters, with cluster VI (7397.45) having the highest intra cluster value, followed by cluster III (5346.99), and cluster V (4130.4), showing significant genetic divergence among accessions in this cluster. Cluster VI and VII (300180) had the greatest inter-cluster distance, followed by Cluster II and VI (289267.7) and Cluster I and VI (214380.5), indicating that the accessions in these groups were genetically the most diversified and might be employed as a parent in a hybridization programme. The wide range of genetic variation seen in clusters VI and VII can be used in breeding programmes for mango genetic improvement or directly accepted as a variety. Fruit yield (60.77 percent) contributed significantly to genetic divergence, followed by fruit weight (26.79 percent), stone percentage (4.74 percent), peel percentage (2.31 percent), and pulp percentage (2.31 percent) (2.05 percent ).

Author(S) Details

Swosti S. Das
Department of Fruit Science and Horticulture Technology, OUAT, Bhubaneswar, India and 2ICAR- Central Institute for Subtropical Horticulture, Rehmankhera, Lucknow-226101, India.

K. Kishore
Central Horticulture Experiment Station (ICAR-IIHR), Bhubaneswar, India.

D. Lenka
Department of Plant Breeding and Genetics, OUAT, Bhubaneswar, India.

D. K. Dash
Department of Fruit Science and Horticulture Technology, OUAT, Bhubaneswar, India.

K. C. Samal
Department of Agricultural Biotechnology, OUAT, Bhubaneswar, India.

D. Samant
Central Horticulture Experiment Station (ICAR-IIHR), Bhubaneswar, India.

C. M. Panda
Department of Fruit Science and Horticulture Technology, OUAT, Bhubaneswar, India.

S. C. Sahoo
Department of Fruit Science and Horticulture Technology, OUAT, Bhubaneswar, India.

S. N. Dash
Department of Fruit Science and Horticulture Technology, OUAT, Bhubaneswar, India.

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