selectoneRadio load with default value

[Tatiana Schineider]

Hello, I wanted a little help!

I have the following code in jsf,

  <t:selectOneRadio id="escolheCidade" forceId="true" forceIdIndex="true" layout="spread" value="#{meuBean.tipoCidade}" required="true">
    <t:selectItems var="escolheCidade" value="#{trataBean.listaTipoCidade}"  
     itemLabel="#{valorCidade.nome}" itemValue="#{valorCidade.tipo}" />  
 </t:selectOneRadio> 

He returns a list of cities, I have to choose one city (radio) for him to return a list of values

I wish he already carried a default value of a radio (already selected), and already appeared straight away the values ​​loaded, if I wanted but there was only one change ..

Does anyone know where I need to change?
thanks