Early selection in Theobroma grandiflorum, aiming at tolerance to hypoxia

Abstract Cupuassu (Theobroma grandiflorum)-based agroforestry system (AFS) can be used for restoration of vegetation around springs and riparian forests water sources (rivers, streams, lakes etc.), subject to constant flooding. The objectives this work were study the relations between morphophysiological traits when flooding occurs, determining most important assess genotypes’ tolerance, evaluate ability cupuassu genotypes express alternative phenotypes grow efficiently, in order select materials capable sustaining hypoxic conditions. trial was carried out a greenhouse, completely randomized design with 16 x 2 (16 progenies two regimes) factorial scheme four replications. Treatments started six months after seedlings transplanted. 15 related vegetative development, biomass accumulation physiology measured experimental evaluation. Correlations principal components estimated traits’ interrelationships identify assist progeny selection. results revealed that, among evaluated traits, ten sufficient explain variability within population elected as relevant best progenies. 75% showed tolerance partial based on performance plasticity, we selected G174, G48 G56 broader spectrum G44, G47 G51 conditions only. promising evidence pointed here will need corroborated field tests, so that tree recommended recovery environments hypoxia.