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Stability Analysis for Tuber Yield Components in Potato

A. Haydar
Department of Botany, University of Rajshahi, Bangladesh

M. A. Islam
Department of Botany, University of Rajshahi, Bangladesh

M. A. ISLAM
Department of Botany, University of Rajshahi, Bangladesh

T. Ara
Department of Botany, University of Rajshahi, Bangladesh

E. H. Khokan
Department of Botany, University of Rajshahi, Bangladesh

Abstract/ Executive Summary:

Thirty potato genotypes were evaluated for four successive years (environments) for their stability analysis using Eberhert and Russell’s model at Botanical Research Field, Rajshahi University, Rajshahi, Bangladesh during the Rabi crop seasons of 2004-2008. Analysis of variance, mean, regression co-efficient (bi) and deviation from regression (s₂di) of the individual genotypes were estimated to evaluate the stable performance of the genotypes. The mean squares due to genotypes, environments and genotype- environment interaction were significant for all the characters studied suggesting a lot of variability among the genotypes environments and the genotypes interacted significantly with environments. Among all the genotypes, Petronese and Calwhite showed stable performance for tuber number and tuber yield under all environments. The genotypes Yucon gold was highly responsive and suitable for favorable environments only.

Keywords: Stability, Genotype, Interaction, Potato

Location: The Botanical research field of Rajshahi University, Bangladesh

Start Date: 00-00-2004

End Date: 00-00-2008

Program Area: Crop-Soil-Water Management

Commodity: Potato

Objectives:

Objective of the study was to investigate the stability of agronomic characters of thirty genotypes grown in four successive years using variance and regression analysis.

Methodology:

The experiment was carried out four successive years in the Botanical research field of Rajshahi University, Bangladesh during the year 2004-2008. Thirty potato genotypes viz. Petronese, Conestoga, Granulla, Raja, Calwhite, Hagrai, Japanese red, Atlas, TPS-573, Diamont, Banana, Russet Burbank, Green mountain, Atlantic, Shilbilati, Cheroki, Lapakri, Blondy, Superior, Prelude, Fundy, Yucon gold, GMO, TPS-67, Elvera, Multa, Shepody, TPS-7, All blue and Monona were collected from Plant Breeding and Gene Engineering Lab, Dept. of Botany, University of Rajshahi, Bangladesh and used as experimental materials. In each year the experiment was conducted in a randomized block design with three replications. In order to investigate the stability, following six yield related characters were evaluated viz. plant height (PH), number of leaves/plant (NLP), fresh weight/plant (FWP), number of tubers/plant (NTP), average tuber weight of plant (ATW) and tuber yield/plant (TYP). To select the desirable genotypes, the mean performance, regression co-efficient (bi) and deviation from regression (s²di) were calculated using Eberhert and Russell’s model.

Source of Information: Int. J. Sustain. Crop Prod. 4(4):01-04, 2009

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The Fundy genotype has high mean performance (212.00), negative linear effect (-0.971) and its deviation from regression was minimum (0.08) suggested its suitability for poor or unfavorable environments. The genotypes Banana, Shilbilati and Yucon gold showed bi values greater than units (1.303, 1.611 and 1.148, respectively) S²di values closer to zero ( 0.190, 0.61, and 0.840, respectively) indicated suitability to grow these genotypes under high yielding genotypes.

Knowledge Management: Journal