The large number of these genes, most of which are unidentifiable and have complex interrelationships, requires that a large number of individuals be maintained in a breeding programme.

 
  • 這類(lèi)基因數目大,并且其大多數是不能確定的,有著(zhù)復雜的相互關(guān)系,要求在育種中保持有大量的植物個(gè)體。
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