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Genotypic and Phenotypic Variability in Mango (mangifera Indica L.)

D. A. N. Majumder
Manager
Plant Biotechnology Laboratory, BRAC Agricultural Research and Development Centre, Gazipur

L. Hassan
Professor
Dept. of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh

M.A. Rahim
Professor
Dept. of Horticulture, BAU, Mymensingh

M. M. Kabir
Professor
Dept. of Horticulture, Hajee Mohammad Danesh Science & Technology University, Dinajpur-5200, Bangladesh.

Abstract/ Executive Summary:

Sixty mango genotypes were studied to find out their variability, heritability, and genetic advance. Significant variations were observed in 20 characters. There were also considerable differences between the genotypic and the phenotypic coefficients of variation for almost all the characters which indicated the influence of environment on the expression of these traits. Among the studied characters, GCV and PCV were high for weight of harvested fruits per plant, % fruit harvest per inflorescence, % initial fruit set per inflorescence, number of fruits per plant and number of main branches per inflorescence. All the characters showed considerably high heritability which ranged from 56.21 to 98.24% and the genetic advance (as % of mean) was high for the maximum traits. High heritability coupled with high genetic advance was observed in weight of harvested fruits per plant, % initial fruit set per inflorescence, % of flowering shoot, number of inflorescences per shoot, percent fruit harvest per inflorescence, number of main branches per inflorescence, number of fruits per plant, number of inflorescences per shoot, plant height (cm), and percent perfect flowers which indicated that these characters were less influenced by environment confirming predominance of additive gene action and therefore, selection in favour of these characters would be feasible for yield improvement of mango.

Keywords: Variability, Heritability, Genetic advance and mango.

Location: Dept. of Horticulture, Bangladesh Agricultural University, Mymensingh

Start Date: 00-12-2006

End Date: 00-07-2008

Program Area: Variety and Species

Commodity: Mango

Objectives:

To gather information on genetic variability, heritability, and genetic advance among the important traits of mango crop.

Methodology:

The experimental materials comprised of 60 mango genotypes. The study was conducted on the pre-established mango orchard of BAU- Germplasm Centre, Department of Horticulture, Bangladesh Agricultural University (BAU), Mymensingh during December to July 2006-2007 and 2007-2008. The experiment was laid out in the RCBD with three replications. The distance from plant to plant was 5 m and row to row was 5 m. Data were recorded on plant height, leaf area, duration of flowering, percent of flowering shoot, number of inflorescence per shoot, number of main branches per inflorescence, percent perfect flowers, percent fruit set per inflorescence, percent fruit dropping at pea stage, days to maturity, percent fruit harvest per inflorescence, number of fruits harvested per plant, weight of harvested fruits per plant, fruit weight, fruit length, fruit breadth, fruit thickness, percent edible portion, percent non-edible portion, and percent total soluble solids (TSS). TSS was measured with the help of a hand refractometer.

Source of Information: Bangladesh J. Agril. Res. 37(4): 683-690, December 2012, (ISSN 0258-7122)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The characters having high heritability as well as moderate to high genetic advance and narrow difference between GCV and PCV were found in plant height, percent flowering shoot, number of inflorescences per shoot, percent perfect flower, initial fruit set per inflorescence, fruit weight, fruit breadth, fruit thickness, % edible portion,% non-edible potion, fruit harvest per inflorescence, number of fruits per plant, and weight of harvested fruits per plant indicate predominate of additive gene action for these characters.

Knowledge Management: Journal