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Analysis of Genetic Diversity in Some Potato Varieties Grown in Bangladesh

A. Haydar
Plant Breeding and Gene Engineering Laboratory, Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

M.B. Ahmed
Plant Breeding and Gene Engineering Laboratory, Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

M.M. Hannan
Plant Breeding and Gene Engineering Laboratory, Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

M.A. Razvy
Plant Breeding and Gene Engineering Laboratory, Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

M.A. Mandal
Plant Breeding and Gene Engineering Laboratory, Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

M. Salahin
Plant Breeding and Gene Engineering Laboratory, Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

R. Karim
Plant Breeding and Gene Engineering Laboratory, Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

M. Hossain
Plant Breeding and Gene Engineering Laboratory, Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

Genetic diversity using Mahalanobis’s D - technique was studied for tuber yield and its components 2 viz., Plant Height (PH), Number of Leaves/plant (NLPP), Fresh Weight/plant (FWP), Number of Tubers/plant (NLPP), Number of Eyes/tuber (NEPT), Average Tuber Weight of Plant (ATWP) and Tuber weight/plant (TWt./P). The 30 potato genotypes were grouped into six clusters. The maximum diversity was contributed by tuber weight/plant. The cluster III and cluster IV contained the maximum number of genotype and the cluster I contained the minimum. The highest inter-cluster distance between cluster I and cluster VI followed by between cluster I and cluster v showing wide diversity among the groups. The highest intra-cluster distance was observed in cluster VI and lowest in cluster II. The inter cluster distance in most of the cases were higher than the intra-cluster distance indicating wider genetic diversity among the genotypes of different groups. Plant height, number of leaves/ plant, fresh weight/plant and tuber weight/plant showed maximum contribution towards total divergence among the genotypes.

Keywords: Genetic diversity, Mahalanobis’s, D -technique, Potato tuber

Location: In Bangladesh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Diversity

Objectives:

The present study was undertaken to find out the nature and magnitude of genetic diversity and the characters contributing genetic diversity of 30 potato genotypes by D statistics

Methodology:

The experiment was conducted at A. H Z. Biotech Ltd, Namo Bhadhra, Rajshahi, Bangladesh during Rabi seasons of three consecutive years (2003-2005). Thirty potato genotypes were grown for the experiment. The potato tubers were grown following Randomized Block Design with three replications and a spacing of 60 cm row to row and 20 cm plant to plant. viz., 10 tons of cow dung, 326-217-250 kg of urea, TSP and MP per hectare were used. The potato tubers were planted during first week of November for three years. Intercultural operations like weeding, irrigation, mulching and earthing up were performed as and when necessary. Data on different agronomic characters were recorded on an individual plant basis from 10 plants randomly selected in each row of each replication. Data were measured and recorded with 10 randomly selected plants on plant height (cm), number of tubers/plant, fresh weight/plant (g), number of tubers/ plant, number of eyes/tuber, average tuber weight/ plant (g) and tuber weight/plant (g). Genetic diversity analysis was carried out using Mahalanobis D statistics. The 2 genotypes were grouped into clusters as per the Tocher method following the formula cited by Singh and Chaudhary [8]. All the statistical analysis was carried out using GENSTAT-5 Computer software.

Source of Information: Middle-East Journal of Scientific Research 2 (3-4): 143-145, 2007 ISSN 1990-9233

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The Principal Component Analysis revealed that the vectors (I and II) for plant height, number of leaves/plant, fresh weight/plant, average tuber weight of plant, and tuber weight/plant were positive. Such results indicated that those five characters contributed maximum towards diversity. The greater diversity in the present materials is due to these five characters which will offer good scope for improvement of yield through a rational selection of parents genotypes for potato producing. It could be concluded that short plant height, less number of leaves/plant, less number of eyes/tuber and less tuber yielding genotypes from cluster I, best and high quality of plant height, number of leaves/plant, fresh weight/plant, number of tuber/plant and tuber weight/ plant from cluster I could be selected as parents for hybridization program.

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