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Study on G X E Interaction of BRRI Varieties

Dr. Md. Ismail Hossin
PSO and Head
Agricultural Statistics Division, BRRI

Dr. Md. Shahjahan Kabir
Director (Administration and Common Service)
BRRI

Niaz Md. Farhat Rahman
SSO
Agricultural Statistics Division, BRRI

Abstract/ Executive Summary:

Experiments are being conducted in the T. Aman and Boro seasons with BRRI released rice varieties since T. Aman 2012-13 and Boro 2013 in Gazipur and different regional stations. The number of varieties is 27 and 25 in T. Aman and Boro season respectively. The design used is RCB with three replications and the effective plot size (harvest area) is 5-x-2 m² leaving the boarder. Recommended crop management practices are followed. The newly developed stability model was used to analyse the data. In T. Aman season, BR11, BRRI dhan49, BRRI dhan51 and BRRI dhan52 were found as the most stable, while BR3, BR4 and BRRI dhan23 appeared to be below average stable among the non-aromatic rice. In case of aromatic rice BR5, BRRI dhan34, BRRI dhan37 and BRRI dhan38 also appeared to be below average stable varieties. BRRI dhan28 and BRRI dhan29 was the only most stable variety and BR1, BR2, BR6, BR7, BR8, BR18, BR19, BR26, BRRI dhan27, BRRI dhan35, BRRI dhan55 and BRRI dhan58 appeared to be below average stable in Boro season. In case of fine rice BRRI dhan50 also appeared to be below average stable in Boro season.

Keywords: BRRI varieties, GxE interaction, Abiotic

Location: BRRI HQ and All R/S of BRRI

Start Date: 01-07-2013

End Date: 30-06-2014

Program Area: Socio-economic and Policy

Commodity: Rice

Objectives:

To standardize the model for stability analysis of BRRI varieties
To determine the stability index of BRRI released varieties
To maintain season, year and location-wise database on BRRI varieties.
To identify the bio-physical and socio-economic factors causing instability.

Methodology:

Experiments are being conducted in the T. Aman and Boro seasons with BRRI released rice varieties since T. Aman 2011-12 in Gazipur and different Regional Stations. The collaborative regional stations in the T. Aman season are Rajshahi, Rangpur, Comilla, Sonagazi, Barisal, Satkhira and Kushtia and in the Boro season Rajshahi, Rangpur, Comilla, Habiganj, Barisal, Bhanga, Satkhira and Kushtia. In T. Aman season, the number of varieties is 23 and that in Boro is 23. The design used is RCB with three replications and the effective plot size (harvest area) is 5-x-2 m² leaving the boarder. Recommended crop management practices are followed. Stability analysis of the experimental data was performed following the new developed model, which is described bellow: The stability model: The newly developed stability model takes into account the performance of the genotypes across the geographical locations differing in land, soil and other biotic and abiotic factors and over the years characterizing fluctuation of weather variable, floods, drought, etc.

Source of Information: BRRI Annual Report 2013-14, 179-182,BRRI, Gazipur.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the non-aromatic T. Aman varieties, BR11, BRRI dhan49, BRRI dhan51 and BRRI dhan52 were found stable and their stability ranks were 4, 2, 1 and 3 respectively. BR3, BR4 and BRRI dhan23 appeared to be below average stable. BR10, BR22, BRRI dhan 25, BRRI dhan 30, BRRI dhan 31, BRRI dhan 32, BRRI dhan 33, BRRI dhan 39, BRRI dhan 40, BRRI dhan 41, BRRI dhan 44, BRRI dhan 46, BRRI dhan 53, BRRI dhan 54, BRRI dhan 56 were found to have average stability amoung non aromatic T. Aman varieties. Among the aromatic T. Aman rice BR5, BRRI dhan34, BRRI dhan37 and BRRI dhan 38 appeared to be average stable. In Boro season, the only stable variety was BRRI dhan28 and BRRI dhan29 in each year. BR3, BR9, BR12, BR14, BR15, BR16, BR17, BRRIdhan36, BRRIdhan45, BRRIdhan47 and BRRIdhan50 appeared to have average stability. All other Boro varieties appeared to have below average stability.

Knowledge Management: Report/Proceedings