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Genetic Variability in Snakegourd (tricosanthes Cucurminata)

Fatema Nusrat Ahsan
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

A.K.M. Aminul Islam
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M. Golam Rasul
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M. Abdul Khaleque Mian
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M. Mofazzal Hossain
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the experimental farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur to study the genetic variability and hybrid performance of snake gourd using seven parents and their twelve F₁ hybrids. The analysis of variance showed significant difference among the parents and hybrids for most of the characters except days to first female flower, days to first fruit setting and node number of first fruit setting. The difference between phenotypic and genotypic variance were minimum in most of the characters except days to first male and female flowering, days to first fruit setting. Node number of first male and female flower, node number of first fruit setting, number of primary branches per plant, length of vine, fruit diameter and fruit yield per plant showed high heritability along with low genetic advance. Again days to first male and female flower, first fruit setting showed low broad sense heritability and low genetic advance. Total number of fruits per plant, average fruit weight and fruit length shows high broad sense heritability along with high genetic advance. The hybrid SG-18× SG-01 produced the highest number of fruits per plant and fruit yield per plant followed by SG-04 × SG-26. The hybrid SG-04× SG-26 took minimum days to produce female flower. The hybrids SG-18× SG-01, SG-04× SG-26, SG-06× SG-18, SG-06× SG-25 and SG-18× SG-25 could be identified as promising combination for commercial cultivation.

Keywords: Snake gourd (Triconsanthes cucurminata), Hybrid, Underutilized Crop, GCV, PCV, Heritability, Summer vegetables

Location: Experimental farm, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur, Bangladesh

Start Date: 00-03-2007

End Date: 00-06-2007

Program Area: Variety and Species

Commodity: Snake gourd

Objectives:

To determine the magnitude of genetic variability as well as hybrid performance for some desirable yield contributing characters.

Methodology:

The experiment was conducted at the experimental farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur, Bangladesh during the months from March to June, 2007. Seven parents (P₁=SG-01. P₂=SG-04, P₃=SG-06, P₄=SG-10, P₅=SG-18, P₆=SG-25 and P₇=SG-26) and their twelve F₁s were used as an experimental materials. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Recommended doses of manure and fertilizers were applied in the experimental field. Data were collected on each of the seven parents and their F₁s for the characters such as days to first male flower, days to first female flower, node number of first male flower, node number of first female flower, days to first fruit setting, node number of first fruit setting, number of primary branches per plant, length of vine in each plant (cm), total number of fruits plant, fruit weight (g), fruit diameter (cm), fruit length (cm), fruit yield/plant (g). For univariate analysis, analysis of variance was done individually by a statistical package SAS, version 9.01 (2008) and test of significance was done by F-test. Genotypic and phenotypic coefficients of variation were calculated. The broad sense heritability and genetic advance in percentage of mean were calculated following Hanson (1961) and Johnson et al. (1955).

Source of Information: Journal of Agricultural Technology 2014 Vol. 10(2): 355-366, ISSN 1686-9141

Article Link (Online Journal): http://www.ijat-aatsea.com

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Node number of first male and female flower, node number of first fruit setting, number of primary branches per plant, length of vine, fruit diameter and fruit yield per plant showed high heritability along with low genetic advance revealed non-additive gene action. High heritability is exhibit due to influence of favorable environment rather than genotypes and selection for this traits may be rewarding. Again days to first male and female flower, first fruit setting showed low broad sense heritability and low genetic advance which suggest that the character is highly influenced by environmental effects and selection for this character will not be effective and improvement for this character would not be effective through phenotypic selection. Total number of fruit per plant, average fruit weight and fruit length shows high broad sense heritability along with high genetic advance indicated that the heritability is due to additive gene effects and considerable potential for developing of high yielding varieties through selection of desirable genotypes. Low heritability coupled with high genetic advance for days to first female flower indicates that the character is governed by additive gene effects and the low heritability is due to high environmental effects. The characters with high values of heritability accompanied by high genetic advance indicating that might be transmitted to their hybrid progenies. This result suggests that improvement of these would be effective through phenotypic selection. High heritability is considered to be helpful in making selection of superior genotypes on the basis of phenotypic performance. The high value of heritability and genetic advance show that variation is attributable to a high degree of additive effect and the character can be improved by selection.

Knowledge Management: Journal