Field evaluation of exotic cacao (Theobroma cacao L.) accessions
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2007-02
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Exotic cacao clones obtained from Kew Botanical Garden, UK were evaluated for their field performance at CPCRI Regional Station, Vittal since 1991. The experiment blocks were laid out in RBD with two replications in a low-lying plot with sandy loam soil exposed to water stagnation for a period of six months every year. Growth measurements and the dry bean yield over four years (two each in their pre and post-yield stabilised age) have been included for various statistical analyses like ANOVA, Principal component, Correlation and Stability indices. Clones differed significantly in parameters like stem girth, weights of pruned biomass, number of cherelles and in dry bean yield. Na 242 clones showed the maximum bean yield with acceptable consistency indicated by CV (41.64%) while having had a moderate weight of pruned biomass of 3.770 kg. Most efficient lines have been those which produced more number of pods and dry beans from a small to moderate canopy. Number of cherelles (99.5%), stem girth and canopy volume (90.60%) contributed to the maximum variance observed through the first two principal components. Strong dependence of bean yield on cherelle number, branch number and stem girth has been indicated.
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Plantation Crops Research and Development in the New Millennium,(Proceedings of PLACROSYM XIV) CPCRI, Kasaragod 2002 p-232-235