Genetic determinism of the vegetative and reproductive traits in an F1 olive tree progeny : Evidence of tree ontogeny effect

摘要: The agronomic performance of fruit trees is significantly influenced by tree internal organization. Introducing architectural traits in breeding programs could thus lead to select new varieties with a regular bearing and lower input demand order reduce training environmental costs. However, an interaction between ontogeny genetic factors expected. In this study, we investigated the determinism olive tree, accounting for development over 5 years until first flowering occurrence. We studied F1 progeny issued from cross two contrasted genotypes, ‘Oliviere’ ‘Arbequina’. Tree architecture was decomposed quantitative traits, related (1) growth branching, (2) fruiting. Models, including year growth, branching genotype effects, were built variance function covariance structure when necessary. After model selection, broad sense heritabilities calculated. During 3 years, both mean values vegetative factor significance depended on shoot within-tree position. Dependencies consecutive revealed whole form. Whole form variables showed medium high heritability values, whereas reproductive highly heritable. This study demonstrates existence ontogenic trends which result heritable only at periphery. A phenotyping strategy adapted its characteristics list relevant such as maximal internode length, proposed. Transgressive effects suggest that progress be performed future selection programs.