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Genetic Variability, Heritability and Genetic Advance in Pointed Gourd (trichosanthes Dioica Roxb.)

M. A. Malek
Plant Genetic Resources Centre Bangladesh Agricultural Research Institute Joydebpur, Gazipur

M. A. Bari Miah
Professor
Institute of Biological Sciences, University of Rajshahi, Rajshahi

M. O. Islam
Plant Genetic Resources Centre Bangladesh Agricultural Research Institute Joydebpur, Gazipur

A. M. M. Mosiul Hoque
Plant Genetic Resources Centre Bangladesh Agricultural Research Institute Joydebpur, Gazipur

R. Gomes
Research Wing, BARI, Joydebpur, Gazipur

Abstract/ Executive Summary:

Genetic variability, heritability in broad sense and expected genetic advance as percent of mean for fruit yield and nine characters were studied in 25 pointed gourd genotypes. Fruits per plant and fruit yield per plant showed maximum variability. Genotypic coefficient of variation was found high for fruit yield and number of fruits per plant. All the characters under study were highly heritable in nature. High heritability coupled with high genetic advance was observed for fruit yield and fruits per plant, which indicated that these characters are more reliable for effective selection.

Keywords: Pointed gourd, Genetic variability, Heritability, Genetic advance

Location: Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur

Start Date: 01-10-2002

End Date: 31-08-2003

Program Area: Variety and Species

Commodity: Pointed gourd

Objectives:

A study on the variability using genetic parameters like genetic coefficient of variation, heritability and genetic advance is essential for initiating a breeding program

Methodology:

The study was conducted at the experimental field of Plant Genetic Resources Centre (PGRC), Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur 1701 during October 2002 to August 2003 on twenty five pointed gourd genotypes. The experiment was laid out in a randomized complete block design with three replications. Each block within the replication consisted of 27 genotypes with a distance of 2.0 x 2.0 m. (including two male plants). Recommended cultural practices were followed through the growth period to raise a good crop. Pits of size 30 x 30 x 30 cm³ were dug and filled with soil, cow dung and sand mixed in equal proportion. Around 30g Urea, 25g Muriate of Potash, 20g Triple Super Phosphate and 4g Zypsum were also added in each pit. The observations were recorded on nodes per vine, vines per plant, vine length (m), fruits per plant, female flower length (cm), fruit length (cm), fruit width (cm), fruit volume (cc), fruit weight (g) and fruit yield per plant (kg). Analysis of variance, variance components, genotypic and phenotypic coefficient of variation, heritability in broad sense and expected genetic advance were estimated by the formulae suggested by Singh and Chaudhary (1985).

Source of Information: Bangladesh J. Pl. Breed. Genet., 20(1) : 47-52, 2007

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded that fruits per plant and fruit yield having high heritability associated with high genetic advance and also high GCV confirmed additive gene action suggesting effective selection could be made for these characters in pointed gourd.

Knowledge Management: Journal