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Assessment of Yield Stability of Maize Inbred Lines in Multi-environment Trials

MA Miah
Plant Breeding Division, Regional Agricultural Research Station, Jessore, Bangladesh.

S Ahmed
Plant Breeding Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh.

MS Uddin
Plant Breeding Division, Regional Agricultural Research Station, Barisal, Bangladesh.

Abstract/ Executive Summary:

Stable performance of maize hybrids at a specific growing region is critical for obtaining high and stable yield. The objectives of this study were to assess grain yield stability of fourteen maize inbred lines from five different diverse regions of Bangladesh during 2010 - 2011 growing season (rabi) using genotype main effect plus genotype by environment interaction biplot and to identify maize inbred lines that have both high mean yield and stable yield performance across test environments of Bangladesh. The GGE biplot method was effective in recognition that the inbreds G2 and G13 to be the most desirable ones for growing in Jessore (E1), G6 and G8 in Gazipur (E2), G3 in Rahmatpur (E3) and G1, G12, G14 and G9 in Debiganj (E5) region. The inbreds G5 and G7 had average grain yield and high stability, whereas the inbred line G10 had high grain yield and high stability. Besides, the inbred line G13 was the least stable across different environments. This technique can serve as a useful tool for recommendation of maize inbreds for specific growing regions taking into account the specificities of hybrids and growing conditions.

Keywords: Maize, GGE biplot, Stability, Genotype × environment interaction

Location: Jessore, Joydebpur, Rahmatpur, Hathazari and Debiganj

Start Date: 00-11-2010

End Date: 00-04-2011

Program Area: Crop-Soil-Water Management

Commodity: Maize

Objectives:

(1) To evaluate the grain yield stability of 14 maize inbred lines tested across five locations applying GGE biplot model.

(2) To identify maize inbred lines that have both high mean yield and stable yield performance across test environments of Bangladesh.

Methodology:

This research was carried out at five locations (environments) i.e. at the Regional Agricultural Research Station, Jessore; Bangladesh Agricultural Research Institute, Joydebpur; Regional Agricultural Research Station, Rahmatpur; Regional Agricultural Research Station, Hathazari and Breeders' Seed Production Centre, Debiganj which correspond to the South-West, Central, South, South-East and North-West areas of Bangladesh distributed in the districts of Jessore (JE), Gazipur (GA), Barisal (BA), Chitagong (CH) and Panchagarh (PA) respectively. These five locations were represented as E1, E2, E3, E4 and E5, respectively. Fourteen quality protein maize (QPM) inbred lines were used in this trial. The experiment was conducted during November 2010 to April, 2011 following Alpha Lattice design with two replications and six blocks. The plots were made up of single 5-m row, using a population density of 66,666 plants per hectare. Fertilizers were applied at the rate of 120:35:70:40:5:1 kg/ha of N, P, K, S, Zn and B, respectively. Grain yield (t ha^-1 ) for each inbred was adjust- ed to 15.5% grain moisture content. Genotype and genotype × environment (GGE) biplot analyses were performed using Plant Breeding Tools (PBTools) software version 1.4 . GGE biplot analysis was also used to generate graphs for: (i) comparing environments to the ideal environment which is the one that is most discriminating for genotypes, (ii) the "What-won-where" pattern where specific genotypes can be recommended to specific environments and (iii) environment vector which is the distance between the marker of the environment to the plot origin. The angles between environment vectors were used to judge correlations (similarities/dissimilarities) between pairs of environments.

Source of Information: Bangladesh J. Sci. Ind. Res. 51(1), 61-68, 2016, ISSN 0304-9809

Article Link (Online Journal): DOI: http://dx.doi.org/10.3329/bjsir.v51i1.27064

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The GGE biplot analysis identified the inbreds G2 and G13 to be the most desirable inbreds for growing in Jessore (E1), G6 and G8 in E2 (Gazipur), G3 in Rahmatpur (E3) and G1, G12, G14 and G9 in Debiganj (E5) region. The inbreds G5 and G7 had average grain yield and high stability, whereas the inbred G10 had high grain yield and high stability. However, the inbred G13 was the least stable across test environments. Moreover, the GGE biplot methodology was found to be an useful tool for identification of environments in which maize inbreds would have the best possible performance.

Knowledge Management: Journal