From the standpoint of utility, the more strains the better, because the greater the variety of strains preserved, the easier it is to call the outstanding characteristics of each and cultivate a new breed combining them all.
站在利用觀點上，保種原是保越多的種越好，庫存品種越豐，自不同種源取得優良特性就越便利，得以培育「集百家精華」於一身的新品種。