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Genetic Diversity of Ash Gourd (benincasa Hispida) Genotypes

M. M. R. Dewan
Rice Farming Systems, Bangladesh Rice Research InstituteGazipur 1701, Bangladesh

M. G. Rabbani
Department of Horticulture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

U. A. Naher
Soil Science Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

S. Pramanik
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

and M. K. Quais
Rice Farming Systems, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted to study the field performance, variability and genetic divergence for yield and yield contributing characters of 46 ash gourd genotypes at the Horticulture Farm, Bangladesh Agricultural University, Mymensingh. Wide range of variations were found among the ash gourd genotypes in respect of different parameters such as vine length at harvest, fruit length, fruit diameter, sex ratio, number of fruits plant^-1, average weight fruit^-1 and yield plant-1. The genotype BH21 showed the highest performance in number of fruits plant^-1 and yield plant^-1. In respect of average weight fruit-1, the genotype BH16 produced the heaviest (1.86 kg) fruit and the genotype BHl7 produced the lightest (0.67 kg) fruit. The genotype BH18 had the highest sex ratio (8.16) and the genotype BH14 had the lowest sex ratio (3.44). In case of number of fruits plant-1, the genotype BH46 and BH53 had the minimum number of fruits (1.33) and the genotype BH21 had the maximum number of fruits (16.16) per plant which was statistically similar with the genotype BH12 (15.00). The genotypes were also tested for genetic divergence utilizing the multivariate analysis. The genotypes were grouped into eight clusters. However, there was no relationship found between genetic divergence and geographic distribution of the genotypes.

Keywords: Fruit yield; Vine length; Flesh thickness; Sex ratio

Location: Horticulture Farm, Bangladesh Agricultural University, Mymensingh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Ash gourd

Objectives:

The present study was undertaken to assess the performance and genotypic diversity of ash gourd genotypes for yield and yield contributing characters.

Methodology:

The study was conducted under the Project of "Collection, Evaluation, Conservation and Utilization of Landraces and Wild relatives of some Important Vegetables and Fruits of Bangladesh (CVFB)" at the Horticulture Farm, Bangladesh Agricultural University, Mymensingh. In this experiment 46 ash gourd genotypes were used as experimental materials which were collected from different places of Bangladesh. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Each replication consists with three plants from each genotype. The distance between pits was 1.5m and row to row was 2.0m. The experimental bed was 4.5 m x 1.5 m in size and was prepared at a height of 10 cm from the ground level in the experimental plot by spade. After bed preparation, the pits were prepared with the help of spade. Recommended dose of manure and fertilizers were applied in the experimental plot for ash gourd cultivation (Anonymous 1994). The seeds of different genotypes were dibbled in the pit of raised beds. The seedlings were observed carefully. Different types of intercultural operations were done during the growing period of crop. Trellis and staking were provided and support was given to the plants by bamboo sticks to facilitate climbing up the plant easily and to protect the fruits from soil pest and pathogens. The trellis also facilitated easy harvesting of the fruits. Pests were controlled as and when needed. Green fruits were harvested in every month when they attained in edible stage. Vine length at harvest, number of flowers (male and female) per plant, sex ratio (male: female), fruit length (at green stage), fruit diameter (at green stage), fruit weight, flesh thickness (at green stage), fruits per plant, yield per plant were recorded during the experimental period. The data in respect of yield and yield contributing characters were statistically analyzed using MSTAT software. The means for all treatments were calculated and analyses of variances for all characters were performed by F -test (Gomez and Gomez 1984). Data recorded on eight characters viz., vine length (at harvest), sex ratio, fruit length, fruit diameter, flesh thickness, average weight fruit^-1, number of fruit plant^-1 and yield plant^-1 were subjected to multivariate analysis according to GENSTAT 513 (Mahalanobis, 1936 and Digby et al., 1989).

Source of Information: Bangladesh J. Pl. Breed. Genet., 26(2): 01-08, 2013

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The result of the present study revealed that a wide range of variability existed among the collected ash gourd genotypes. The 46 genotypes were grouped into eight different clusters, which proved a wide range of variation exist among the tested genotypes. However, there was no relationship found between genetic divergence and geographic distribution of the genotypes. These variabilities can be used for future breeding programme of ash gourd in our country.

Knowledge Management: Journal