ArticleFrontiers in plant science2026
Stability analysis of cocoa clones for yield in the humid tropics of India.
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Climate change, marked by rising temperatures and shifting rainfall patterns, is known to impact cocoa growth thus fluctuating cocoa production in various countries. The objective of this study is to assess the yield stability and adaptability of different cocoa clones under varying environmental conditions and to identify genotypes suitable for climate-stressed and marginal environments. Methods: Six cocoa clones-VTLCC1, VTLCH1, VTLCH2, VTLCH3, VTLCH4, and VTLC1 (control) laid in RCBD with four replications as intercrops in a coconut plantation -were evaluated over four consecutive years (2020-2023) to assess variability in dry bean yield and related traits. Results: The combined regression, additive main effects and multiplicative interaction (AMMI), and variance-based stability analyses demonstrated a significant genotype-by-environment (G × E) interaction and clones differed widely in terms of dry bean yield and other yield parameters. VTLCH2 noted to be the most productive cocoa clone, exhibiting superior pod yield (41.36), higher bean number (41.90), dry bean yield (2.07kg/plant) and stable fat content across environments. Its β Discussion: VTLCH2 consistently recorded superior performance across years that differed in rainfall and temperature, indicating better tolerance to seasonal fluctuations in moisture availability and higher temperature conditions compared with the other clones, as indicated by a negative PC1, and positive PC2 near to unity in AMMI, confirmed the suitability of cocoa clone VTLCH2 for marginal (unfavorable) climate.
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