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Genotypic and Phenotypic Correlation Coefficient Studies for Taro (colocasia Esculenta (l.) Schott.)

KK PAUL
Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh

MA BA\ari
Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh

SMS Isalam
Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh

SC Debnath
Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

Keywords: Colocasia esculenta, Genotypic, Phenotypic, Correlation, Taro, Aroids,

Location: Institute of Biological Sciences, Rajshahi University, Bangladesh

Start Date: 00-00-2005

End Date: 00-00-2006

Program Area: Variety and Species

Commodity: Aroids

Objectives:

To estimate the nature and magnitude of relationships (genotypic and phenotypic) between yield and yield components for identification of best genotypes of taro.

Methodology:

Four hundred and fifty seven edible taro, C. esculenta germplasm accessions were collected from aroid growing 13 districts of Bangladesh during 2005 - 2006. Collected propagules were maintained during the on set of rainy season at the experimental farm of the Institute of Biological Sciences, Rajshahi University, Bangladesh. Selected 30 elite genotypes were sown on March, 2006. All recommended agricultural practices were followed during cultivation period. The experiment was set up in a RCB design with three replications. In each experimental plot, plant propagules are planted with row to row spacing 0.60 m and plant to plant spacing 0.45 cm. was maintained. When the vegetative growth is in climax, leaves become yellowish, dry and dropping then the quantitative parameters such as plant height, petiole length, petiole breadth, leaf length, leaf breadth, leaf number, leaf area Index, inflorescence length, peduncle length, spathe length, spathe breadth, corm length, corm breadth, cormel length, cormel breadth, cormel number, cormel weight, corm weight and yield per plant were observed and data were recorded following the descriptors of Taro with necessary modifications. Leaf area index (LAI) was calculated as leaf length × leaf breadth × 0.75. The collected data were analyzed following the biometrical techniques of analysis. Analysis of variances and the components of variances viz., Genotypic variance (σ2 g), phenotypic variance (σ2 p), and environment variance (σ2 e) and covariance were estimated. Correlation coefficients between all possible pairs of characters both at phenotypic (rp) and genotypic(rg) coefficients were computed.

Source of Information: Bangladesh J. Bot. 43(1): 113-117, 2014 (June)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In genotypic level od taro, only positive and highly significant association was found with spathe breadth.

Knowledge Management: Journal