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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Relationships among Bean Yield Traits in Some Cacao (Theobroma cacao L.) Genotypes
Author(s)
Adenuga Olalekan Omotayo, Adepoju Abigail Funlayo, Olaniyi Olayinka Olufemi and Balogun Shamsudeen Tomiwa
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DOI:10.17265/2161-6264/2018.05.004
Affiliation(s)
Plant Breeding Section, Cocoa Research Institute of Nigeria, Ibadan 23401, Nigeria
ABSTRACT
Cacao (Theobroma cacao L.) produces the cocoa bean, a major foreign
exchange earner for most West African countries and many smallholders’
enterprise. Ample production of cacao is however limited by declining yield
among other factors. This study aimed at determining the correlations of the
phenotypic traits that were related to the yield of the cacao genotypes. Nine new cacao
hybrids were produced from some high-yielding parents in the research farm of
Cocoa Research Institute of Nigeria, Ibadan and evaluated from 2012 through
2014 in Owena (7°11′ N, 5°1′
E), Ondo state, Nigeria. Analysis of variance,
character correlations and path coefficient analysis were used
in the analysis of the relationships among the genotypes. Analysis of variance
revealed significant (p ≤ 0.05) variations for number of rows, weight of beans
per fruit, fresh weight of one bean, weight of one bean after fermentation, pod
value, dry bean length, weight of beans (per fruit) after fermentation and pod
index. The study concluded that significant genotypic and phenotypic correlations
existed among some of the pairs of the fruit and bean characters with one
another and with pod index, suggesting
that the contribution of these characters is either positive or
negative to growth and yield in the cacao genotype, and that fruit and bean
traits are determinants of bean yield in cacao.
KEYWORDS
Bean yield, cacao, correlation, genetic variability, phenotypic traits.
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