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Variability, Correlation and Path Analysis in Pumpkin (cucurbita Moschata L.)

M. S. Sultana
Scientific Officer
Plant Breeding, Tuber Crops Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701

M. A. Kawochar
Scientific Officer
Plant Breeding, Tuber Crops Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701

S. Naznin
Scientific Officer
Plant Breeding, Tuber Crops Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701

A. Siddika
Scientific Officer
Oilseed Research Centre, BARI, Gazipur-1701

F. Mahmud
Professor
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Abstract/ Executive Summary:

Twenty one genotypes of pumpkin (Cucurbita moschata L.) were evaluated to measure the variability among the genotypes for several characters, estimate genetic parameters, association among the characters and their contribution to yield. There was a great deal of significant variation for all the characters among the genotypes. High variability was observed in number of female flowers/plant, number of male flowers/plant, single fruit weight and fruit yield/plant. All the characters except days to first male flowering and days to first female flowering showed high heritability along with high genetic advance in percent of mean. The positive and strong association of number of female flowers/plant (r_g =0.918, r_p =0.839), number of male flowers/plant (r_g =0.687, r_p =0.638), fruit length (r_g =0.691, r_p = 0.520), fruit breadth (r_g =0.518, r_p =0.420) and single fruit weight (r_g =0.492, r_p = 0.431) with fruit yield/plant revealed the importance of these characters in determining fruit yield/plant. On the other hand, days to first male flowering (r_g = -0.623, r_p = -0.550) and days to first female flowering (r_g = -0.689, r_p = -0.543) correlated significantly and negatively with fruit yield/plant. The path co-efficient analysis revealed that the highest positive direct effect was recorded in number of female flowers (0.887) to fruit yield and high direct effect was found in case of days to first female flowering (0.798). Fruit breadth was observed to have the highest positive indirect effect (0.899). In case of fruit length (0.381) and single fruit weight (0.398), the significant positive correlation with fruit yield/plant was observed because of the combination of the direct and indirect effects of fruit length and single fruit weight to fruit yield/plant. Overall, the results indicated that days to first female flowering, number of female flowers, fruit length, fruit breadth and single fruit weight can be used as useful selection criteria to increase fruit yield/plant in pumpkin.

Keywords: Pumpkin, Variability, Correlation, Path co-efficient analysis.

Location: Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Start Date: 00-03-2010

End Date: 00-08-2010

Program Area: Variety and Species

Commodity: Pumpkin

Objectives:

To estimate variability and character association in pumpkin.

Methodology:

The investigation was carried out at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from March to August 2010 to study the variability and character association in 21 pumpkin genotypes. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. These genotypes were assigned at random into pits of each replication. Pits of 55 cm x 55 cm x 50 cm were prepared in each block at a spacing of 3 m x 3 m. Standard production package was followed for raising a healthy crop. For studying different genetic parameters and inter-relationships, thirteen characters were taken into consideration namely, leaf length, leaf breadth, internodes distance, days to first male flowering, days to first female flowering, pedicel length of male flower, pedicel length of female flower, number of male and female flowers/plant, fruit length, fruit breadth, single fruit weight and fruit yield plant ^-1 . Analysis of variance (ANOVA), mean and range were calculated by using MSTATC software program.

Source of Information: Bangladesh J. Agril. Res. 40(3): 479-489, September 2015, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Overall, the results indicated that days to first female flowering, number of female flowers, fruit length, fruit breadth and single fruit weight can be used as useful selection criteria to increase fruit yield/plant in pumpkin.

Knowledge Management: Journal