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Genotype-location Interaction of Indica Rice Using Ammi Model

M. J. Hasan
Hybrid Rice Section Bangladesh Rice Research Institute, Joybdebpur, Gazipur 1701, Bangladesh.

M. U. Kulsum
Hybrid Rice Section Bangladesh Rice Research Institute,. Joybdebpur, Gazipur 1701, Bangladesh.

M. S. Hossain
LGED, Itna, Kishoregonj, Bangladesh, 2Bangladesh Agricultural Research Institute, Gazipur 1701, Bangladesh

M. M. Billah
Hybrid Rice Section Bangladesh Rice Research Institute Joybdebpur, Gazipur 1701, Bangladesh.

A. Ansari
Hybrid Rice Section Bangladesh Rice Research Institute Joybdebpur, Gazipur 1701, Bangladesh.

Abstract/ Executive Summary:

Phenotypic stability of 12 rice genotypes for plant height, days to maturity and yield were assessed at five different locations through regression and deviation from regression using Additive Main Effect and Multiplicative Interaction (AMMI) model. The result showed highly significant genotypic and G x E interaction. The G x E interaction influenced the relative ranking of the genotypes tested, BR1A/BR827R, Teea, BRRI dhan33 and Mayna showed low interaction effect with score nearest to zero with above average yield. While two genotypes BRRI hybrid dhan4 and Heera995 exhibited high positive interaction effect, gave mean grain yield around 5 ton/ha and was better suited to favorable environments. Similarly AMMI characterized the environments and identified Satkhira as a favorable environment for the better expression of the trait studied.

Keywords: GEI, RCBD, IPCA score, Biplot analysis

Location: At Gazipur, Satkhira, Faridpur, Jamalpur and Rajshahi locations.

Start Date: 00-00-2008

End Date: 00-00-2008

Program Area: Variety and Species

Commodity: Rice

Objectives:

To assess the extent of G x E interaction and to select the stable genotypes of hybrid rice over the environments.

Methodology:

The experiment was conducted during the main rainy season (T. Aman) of 2008 at Gazipur, Satkhira, Faridpur, Jamalpur and Rajshahi locations. Nine rice hybrids along with BRRI dhan31, BRRI dhan33 and BRRI dhan39 as check were included in the study. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications in a plot size of 30 m² at spacing of 20 x 15 cm². Twenty one days old seedlings were transplanted with one to two seedlings per hill. Fertilizers were applied @ 150: 100: 70: 60: 10 kg/ha, urea, TSP, MP, Gypsum and ZnSO₄. Nitrogen was applied in three split applications @ 50: 25: 25 kg/ha at 15 days interval each after transplanting, maximum tillering and panicle initiation stage. Total amount of TSP, MP, Gypsum and ZnSO₄ were applied at final land preparation. Standard cultural practices were followed in all the locations to raise a good crop. Plant height (cm), growth duration (days) and plot yield (t/ha) were recorded at maturity by harvesting whole plot and adjusted at 14% moisture content. The analysis of variance (ANOVA) was used and the GE interaction was estimated by the AMMI model (Zobel et al., 1998). Thus, the mean response of the genotype i in environment j (Yij) is modeled by: Yij = μ + gi + aj + E8k (ik” jk + Dij + eij ; where μ is a common constant to the responses (normally the general mean); gi is the fixed effect of genotype i (i= 1, 2, ..., g); aj is the fixed effects of environment j(j=1, 2,..., a); E8k (ik” jk is the fixed significant effect or pattern of the specific interaction of the genotype i with environment j (gaij), where, 8k is the k-th singular value (scalar), (ik and ” jk are the correspondent elements, associated to 8k, of the singular vectors (rows vector and column vector) of the matrix of interaction estimated by ANOVA. For the same matrix, Dij is the non-significant effect or noise of (ga)ij, which is an additional residue and eij is the pooled experimental error, assumed independent and eij ~ N(0, F₂). In this procedure, the contribution of each genotype and each environment to the GE interaction is assessed by use of the biplot graph display in which yield means are plotted against the scores of the first principal component of the interaction (IPCA 1). The stability parameters, regression coefficient (bi) and deviation from regression (S²di) were estimated according to Eberhart and Russell (1966). Significance of differences among bi value and unity was tested by t-test, between S²di and zero by F-test. All the statistical analyses were done using software Crop Stat version 7.2 (AMMI, SSA and ANOVA models).

Source of Information: Bangladesh J. Pl. Breed. Genet., 24(2): 09-18, 2011

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The result showed highly significant genotypic and G x E interaction. The G x E interaction influenced the relative ranking of the genotypes tested, BR1A/BR827R, Teea, BRRI dhan33 and Mayna showed low interaction effect with score nearest to zero with above average yield. While two genotypes BRRI hybrid dhan4 and Heera995 exhibited high positive interaction effect, gave mean grain yield around 5 ton/ha and was better suited to favorable environments. Similarly AMMI characterized the environments and identified Satkhira as a favorable environment for the better expression of the trait studied.

Knowledge Management: Journal