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Published:
Dec 31, 2020Keywords:
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Main Article Content
GENETIC VARIABILITY AND GENETIC ADVANCE OF ELITE VARIETIES OF CASSAVA (Manihot esculenta Crantz)
Abstract
The present study was conducted in National Root Crops Research Institute, Umudike, Nigeria to access the
genetic variability, phenotypic and genotypic coefficient of variation, heritability and genetic advance during
year 2017/2018 cropping season of eight elite cassava genotypes. In this experiment, analysis of variance
indicated that significant variation was present among the cassava genotypes for all the traits under study. The
highest genotypic (GCV) and phenotypic coefficient of variation (PCV) were exhibited by cassava green mite
severity indicating that direct selection can be effective for yield improvement in the populations under study.
Relative magnitude of phenotypic coefficients of variation was higher than genotypic coefficients of variation for
all the characters under study indicating environmental influence on the traits. Moderate heritability and high
genetic advance were observed in the cassava green mite, cassava mosaic disease and fresh root weight. The
combination of the high heritability and high genetic advance provide the clear image of the trait in the selection
process.
