Abstract: Using the concept and structure of packet sets，this paper gives the conceptions of f-heredity information，f-heredity gene of information，F-heredity and F-heredity variation of P-sets.It puts forward f-heredity theorem，F-heredity theorem of P-sets.It also gives the dominant relation theorem between F-heredity variation and F-heredity.F-heredity is one of the most important characteristics of packet sets.

Key words: packet sets, f-genetic gene, f-genetic information, dominant degree, relation theorem

摘要： 利用P-集合概念和结构，给出f-遗传信息，信息的f-遗传基因，P-集合的F-遗传、F-遗传变异等概念;提出信息的f-遗传定理，P-集合的F-遗传定理;提出P-集合的F-遗传变异与F-遗传显性关系定理。

关键词: P-集合, f-遗传基因, f-遗传信息, 显性度, 关系定理