Trick to have the 'Portfolio' entry into the breadcrumbs

portfolio-post.php

<?php	
	/**
	 * Trick to have the 'Portfolio' entry into the breadcrumbs
	 */
	global $portfolio_id; 
	$portfolio_id = 165;
	add_filter('wp_seo_get_bc_ancestors', 'add_portfolio_taxonomy', 10, 1);
	function add_portfolio_taxonomy($ancestors){
		global $portfolio_id;
		$ancestors[] = $portfolio_id;
		return $ancestors;
	}
	global $wp_query, $post;
	the_post();
	$post->post_parent = $portfolio_id;