Dependent picklist not getting populated while creating a record using force:create Record in Salesforce Lightning?

Hi Deepak,

Try this -

Controller-

({
doInit : function(component, event, helper) {
var createEvent = $A.get("e.force:createRecord");
createEvent.setParams({
"entityApiName": "Test_Object__c",
"defaultFieldValues": {
Name : 'Test Record1',
Description__c :'test description',
Parent_field__c : 'a',
Child_Field__c : '1',
additional_field__c : 'q'
}
});
createEvent.fire();
}
})

Thanks.