Correlation and Path Coefficient Analysis among Yield Component Traits of Ethiopian Korerima [Aframomum Corrorima (Braun) P. C. M. Jansen] Genotypes at Tepi, Ethiopia

Hassen Seid

doi:10.7176/jbah/9-9-06

Abstract

An experiment was conducted in research fields to study Phenotypic and genotypic correlation co-efficient of quantitative characters and character association of korerima. Twenty-five korerima germplasm of diverse sources were used to assess the character association and contribution of characters towards capsule/seed yield. Path coefficient analyses were carried out for selected genotypes and to find out the direct and indirect effect of component characters on capsule/seed yield. Analysis of phenotypic and genotypic correlation co-efficient of quantitative characters and partitioning of genotypic correlation to pure seed revealed positive and significant correlation both at genotypic and phenotypic levels with number of capsule bearing suckers per plant, number of capsules per plant, dry capsules weight, number of seeds per capsule, total seeds weight per capsule, dry capsule yield per plot and dry capsule yield ha -1 . Number of seeds per capsule, total seed weight per plot, dry capsule yield per plot and dry capsule yield had high and positive direct effects on pure seed yield, however, number of capsule bearing sackers per plant, dry capsule weight and number of capsule per plant had negative direct effects on pure seed yield at genotypic level. The result indicated that the positive and significant correlation of number of capsule bearing suckers per plant, dry capsule weight, total seed weight per plot, dry capsule yield per plot and dry capsule yield kg ha -1 with pure seed yield per plot were due to the high direct effect of the characters. Data of this study might be useful for quantitative assessment of the variation in yield and yield components, their interrelationship, and direct and indirect effects of different characters on seed yield of korerima. Keywords: Correlation, Direct Effect, Indirect Effect, Path Coefficien, Aframomum corrorima , Korerima DOI : 10.7176/JBAH/9-9-06 Publication date :May 31 st 2019

Highlights

Tepi National Spices Research Center is located in South Nation and Nationalities People (SNNP) Regional State at an elevation of 1200 meter above sea level
Estimates of correlation between yield and other characters as well as among other characters is generating important information on which the selection of genotypes based in breeding programs
Correlation coefficient measures the mutual relationship between various plant characters and determines the component characters on which selection can be based for the improvement in yield as an associated complex characters (Korikanthimath, et al, 2000)

Summary

Introduction

Korarima [Aframomum corrorima (Braun) P.C.M. Jansen] is herbaceous, perennial and aromatic species classified in the monocotyledonous family Zingiberaceae and belongs to the genus Aframomum. The chromosomes of korarima were observed to be small in size and their diploid number was found to be 2n= 2x=48 (Surawit and Wondyifraw, 2013). The plant consists of an underground rhizome, a pseudo stem, and several broad leaves and morphologically it resembles Elettaria species. Mature korarima plant can reach a height of 1-2 m. It sets seed after 3-5 years of planting depending on the planting materials used and it continue to bear seeds for a number of decades (Eyob, 2009)

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