QTL Mapping of Flowering and Fruiting Traits in Olive

摘要: One of the challenge fruit growers are facing is to balance between tree production and vegetative growth from year year. To investigate existence genetic determinism for reproductive behaviour in olive tree, we studied an segregating population derived a cross ‘Oliviere’ ‘Arbequina’ cultivars. Our strategy was based on (i) annual assessment individual trees yield, (ii) decomposition adult units at crown periphery into quantitative variables related both flowering fruiting process relation their branching. Genetic models, including year, genotype effects interactions, were built with variance function correlation structure residuals when necessary. Among progeny, either ‘ON’ or ‘OFF’ given patterns regular vs. irregular bearing revealed. Genotype effect significant yield but not traits unit (GU) scale, whereas interaction traits. A strong found all without Based new constructed map, QTLs small detected, revealing multigenic control Many associated alleles ‘Arbequina’. correlations Yield Fruit set GU scale suggesting common control, even though QTL co-localisations spe`cific years only. Most specific years, did capture status Results also interpreted respect ontogenetic changes branching, alternative sampling proposed capturing behaviour. Regular progenies identified could constitute innovative material selection programs.