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Genotype-environment Interaction for Cob Yield and Maturity in Baby Corn (zea Mays L.)

KAMRUN NAHAR
Plant Breeding Division, Bangladesh Agricultural Research Institute (BARI), Gazipur

S. AHMED,
Plant Breeding Division, Bangladesh Agricultural Research Institute (BARI), Gazipur,

M. A. L. AKANDA
Regional Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Ishurdi, Pabna,

M. A. A. MONDAL
Regional Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Burirhat, Rangpur,

M. A. ISLAM
Regional Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Hathazari, Chittagong

Abstract/ Executive Summary:

Genotype-location interaction and phenotypic stability of cob yield and maturity parameters of eight baby corn genotypes including hybrids and composite varieties were assessed during rabi 2006-2007. Significant genotypeenvironment interactions were observed for all the characters under study. Pooled deviations were also found significant for all the characters except days to harvesting. The genotype Khoibhutta was found stable for days to tasselling, days to harvesting and yield of by product and suited to unfavourable environment. On the other hand, the BBC1 was stable across environments for days to harvesting and cob yield. Genotype NS pop corn was stable for days to tasselling and suited to unfavourable environment and stable for yield of byproduct and cob yield across the environments. The genotype BHM5 showed stable performance only for cob yield across the environments.

Keywords: Stability, Genotype, Environment, G × E, Yield components, Baby corn.

Location:

Start Date: 00-00-2006

End Date: 00-00-2007

Program Area: Crop-Soil-Water Management

Commodity: Maize

Objectives:

The present study, therefore, has been designed to measure the relationship between genotypes and environment effects and to identify stable baby corn in respect of cob yield and maturity.

Methodology:

The experiment was conducted at five locations of Bangladesh viz. Gazipur, Ishurdi, Burirhat, Hathazari, and Jamalpur during rabi 2006-2007. Eight hybrids and composite varieties, along with a commercial check, were evaluated in a randomized complete block design with three replications. The plot size was 2 rows of 5 m long for each entry spaced at 60 × 20 cm between rows and hill. Fertilizers were applied @ 120, 80, 80, 20, and 5 kg/ha of N, P₂O₅, K₂O, S and Zn, respectively. All intercultural operations were done as and when necessary. Data on days to tasselling, days to harvesting of baby cob, yield of by-products (t/ha) and baby cob yields with husk cover (t/ha) were taken. Analysis of variance as well as pooled analysis of variance for different characters over the environments was done as suggested by Singh and Chaudhury (1979). Stability analysis was done using the model proposed by Eberhart and Russel (1966). According to this model, a stable genotype is one which shows (i) high mean, (ii) a regression coefficient (bi) around unity, and (iii) a mean square deviation from regression (S2 di) near to zero.

Source of Information: Bangladesh J. Agril. Res. 35(3) : 489-496, September 2010 ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The genotype Khoibhutta was found stable for days to tasselling, days to harvesting and yield of by product and suited to unfavourable environment. On the other hand, the BBC1 was stable across environments for days to harvesting and cob yield. Genotype NS pop corn was stable for days to tasselling and suited to unfavourable environment and stable for yield of byproduct and cob yield across the environments. The genotype BHM5 showed stable performance only for cob yield across the environments.

Knowledge Management: Journal