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Stability Analysis of BRRI Varieties for Aman and Boro Season 2009-10

Md. Ismail Hossin
SSO and Head
Agricultural Statistics Division, BRRI

Md. Shahjahan Kabir
CSO
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 2008-09 and Boro 2009 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 the reporting period BRRI dhan32, BRRI dhan40, BRRI dhan41 and BR11 were found most stable in T. Aman season, while BR3 and BRRIdhan33 appeared to be unstable among the non-aromatic rice. In case of aromatic rice, BRRI dhan38 appeared to be most stable followed by BRRI dhan37. BRRI dhan29 was the only most stable variety and BR6 appeared to be unstable in Boro season. BR11, BR22 and BRRI dhan32, BR16, BRRI dhan28 and BRRI dhan29, BR9, BR16 and BR20 were found to be more preferable and cultivable varieties due to higher yield in T. Aman, Boro and Aus season respectively among the producers and producer cum consumers. Pure consumers were found to prefer rice varieties on the basis of taste of the varieties.

Keywords: GxE, Model, BRRI varieties

Location: BRRI HQ, Gazipur and All R/S of BRRI

Start Date: 00-00-2009

End Date: 00-00-2010

Program Area: Variety and Species

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:

A new model was developed for stability analysis of genotypes in the year 2004-05 that avoids the jargons of regression analysis and uses a single index to identify the stability of a genotype across different environments. 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. Experiments are being conducted in the T. Aman and Boro seasons with BRRI released rice varieties 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.

Source of Information: BRRI Annual Report 2009-10, 228-229, BRRI, Gazipur.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the non-aromatic T. Aman rices, BRRI dhan32 and BRRI dhan40 were found stable from year to year although their stability ranks interchange between 1 and 2. BR3 and BRRI dhan33 appeared to be unstable. BR4, BRRI dhan51 and BRRI dhan52 was found to have bellow average stability and all other aromatic T. Aman varieties appeared to show average stability. Among the aromatic T. Aman rice, BRRI dhan38 appeared to be the most stable followed by BRRI dhan37, while BR5 and BRRI dhan34 appeared to show bellow average stability. In Boro season, the only stable variety was BRRI dhan29 in each year. BR3, BR9, BR14, BR15, BR16, BR17, BR19, BRRI dhan28 and BRRI dhan36 appeared to have average stability . All other Boro varieties appeared to have bellow average stability among which BR6 was the most unstable variety followed by BR2 and BR8.

Knowledge Management: Report/Proceedings