Polymer composition for the production of injection moulded articles comprising, with respect to the sum of components i.-v.: i) 20 - 60 % by weight of at least one polyester i. comprising: a) a dicarboxylic component comprising with respect to the total dicarboxylic component: a1) 0 - 20 % in moles of units deriving from at least one aromatic dicarboxylic acid, a2) 80 - 100 % in moles of units deriving from at least one saturated aliphatic dicarboxylic acid, a3) 0 - 5 % in moles of units deriving from at least one unsaturated aliphatic dicarboxylic acid; b) a diol component comprising, with respect to the total diol component,: b1) 95 - 100 % in moles of units deriving from at least one saturated aliphatic diol; b2) 0 - 5 % in moles of units deriving from at least one unsaturated aliphatic diol; ii) 30 - 60 % by weight of at least one polyhydroxyalkanoate ii.; iii) 0.01 - 5 % by weight of at least one cross-linking agent and/or a chain extender iii. comprising at least one compound having di- and/or multiple functional groups comprising isocyanate, peroxide, carbodiimide, isocyanurate, oxazoline, epoxy, anhydride, divinyl ether groups and mixtures thereof; iv) 0 - 10 % by weight of at least one filler agent; v) 2 - 30 % by weight of plant fibres. i) 20 - 60 % by weight of at least one polyester i. comprising: a) a dicarboxylic component comprising with respect to the total dicarboxylic component: a1) 0 - 20 % in moles of units deriving from at least one aromatic dicarboxylic acid, a2) 80 - 100 % in moles of units deriving from at least one saturated aliphatic dicarboxylic acid, a3) 0 - 5 % in moles of units deriving from at least one unsaturated aliphatic dicarboxylic acid; b) a diol component comprising, with respect to the total diol component,: b1) 95 - 100 % in moles of units deriving from at least one saturated aliphatic diol; b2) 0 - 5 % in moles of units deriving from at least one unsaturated aliphatic diol; a) a dicarboxylic component comprising with respect to the total dicarboxylic component: a1) 0 - 20 % in moles of units deriving from at least one aromatic dicarboxylic acid, a2) 80 - 100 % in moles of units deriving from at least one saturated aliphatic dicarboxylic acid, a3) 0 - 5 % in moles of units deriving from at least one unsaturated aliphatic dicarboxylic acid; a1) 0 - 20 % in moles of units deriving from at least one aromatic dicarboxylic acid, a2) 80 - 100 % in moles of units deriving from at least one saturated aliphatic dicarboxylic acid, a3) 0 - 5 % in moles of units deriving from at least one unsaturated aliphatic dicarboxylic acid; b) a diol component comprising, with respect to the total diol component,: b1) 95 - 100 % in moles of units deriving from at least one saturated aliphatic diol; b2) 0 - 5 % in moles of units deriving from at least one unsaturated aliphatic diol; b1) 95 - 100 % in moles of units deriving from at least one saturated aliphatic diol; b2) 0 - 5 % in moles of units deriving from at least one unsaturated aliphatic diol; ii) 30 - 60 % by weight of at least one polyhydroxyalkanoate ii.; iii) 0.01 - 5 % by weight of at least one cross-linking agent and/or a chain extender iii. comprising at least one compound having di- and/or multiple functional groups comprising isocyanate, peroxide, carbodiimide, isocyanurate, oxazoline, epoxy, anhydride, divinyl ether groups and mixtures thereof; iv) 0 - 10 % by weight of at least one filler agent; v) 2 - 30 % by weight of plant fibres.