ember select doesnt show properly the selected one

gistfile1.txt

pet template/////////////////////
    <h1>
    {{nombre}} {{color}}
    </h1>
    <p>pertenece a:
   {{dueno.nombre}} {{dueno.apellido}}</p>
  

  {{#if editando}}
      <form role="form">
      <div class="form-group">
        <label for="nombre">nombre</label>
        {{input id='nombre' class="form-control" value=nombre}}
      </div>
      <div class="form-group">
        <label for="color">color</label>
        {{input id='color' class="form-control" value = color}}
      </div>
		seleccionado {{selectedPersona.id}}
       {{view Ember.Select selection=dueno content=personas optionValuePath="content.id"
       optionLabelPath="content.nombre"}}
      <button type="submit" class="btn btn-success" {{action 'modificar'}}>Guardar</button>

      </form>
    {{/if}}
    {{#unless editando}}
    <a href="#" class="btn btn-success" {{action 'editar'}}>Editar</a>
    <a href="#" class="btn btn-danger" {{action 'eliminar'}}>Eliminar</a>
    {{/unless}}


/////////////////////////////////////////////////////
pet router//////////////////////////////////////////
import Ember from 'ember';

export default Ember.Route.extend({
		model: function(params) {
          return this.store.find('pet',  params.pet_id);
	},
	  setupController: function(controller, model) {
    this._super(controller, model);
    // Switch out arr with whatever your personas array is
    controller.set('personas', this.store.all('persona'));
  }
});
//////////////////////////////////////////////////////////

pet controller ///////////////////////////////////////
import Ember from 'ember';

export default Ember.ObjectController.extend({
  needs:['personas', 'persona'],
	  editando: false,
  actions: {
    editar: function() {
      this.set('editando', true);
    },
    modificar: function() {
      this.set('editando', false);
      var m = this.get('model');
      console.log('selected '+this.selectedPersona);
      console.log('duenio '+m.get('dueno'));
      m.save();
    },
    eliminar:  function () {
	var pet = this.get('model');
	pet.deleteRecord();
	pet.save();
	}
  }
});
/////////////////////////////////////////

pet model //////////////////////////////
import DS from 'ember-data';

export default DS.Model.extend({
  nombre:DS.attr('string'),
  color:DS.attr('string'),
  dueno:DS.belongsTo('persona',{async:true})

});