Methodology for Cacao Germplasm Evaluation in Areca Cacao Intercropping Experiment with Super-Imposed Treatments
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1987
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A few Malaysian cacao accessions were introduced into India in 1969 with a view to study the possibility of cultivating them in arecanut gardens as an intercrop to enhance per unit area returns. Since cacao is gaining importance in the national economy in recent times, it necessitated identification of superior genotypes with high yield potential. Even though some of these introduced germplasm material showed high yield, as they are growing as an intercrop in an arecanut garden with manurial and spacing treatments, it couldnt be taken as their actual yield potential with certainty. Therefore a methodology has become very much essential to assess their genotypic potential to utilise them in future breeding programme. An attempt is made here to evaluate the eleven germplasm material which are uniformly distributed in a spacing cum manurial trial of areca-cacao intercropping experiment. The experimental data arising out of the model yijk = μ + bi, + Sj + mk + (sm)jk + eyk under the usual assumptions were transformed to satisfy the model yim = μ + Tl + Clm by eliminating the various treatment effects (bi,, Sj, mk, (sm)jk) and separating out the contribution of accessions (TI) which were masked in the residual term eijk. Analysis of this transformed data enabled us to identify Amel x Na33, Landas 357 and Landas 364 as better performers with regard to both number and weight of pods.
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In: Proceedings, International Cocoa Research conference, 1987 p-643-645