introgression

n. 基因渗入

形容词:introgressive 

in.tro.gres.sion

n.（名词）
Infiltration of the genes of one species into the gene pool of another through repeated backcrossing of an interspecific hybrid with one of its parents.
基因渗入：一物种的基因通过不断地与另一物种基因的亲代种间逆向杂交，而渗透进另一物种基因库的过程

来源：
From Latin intrôgressus [past participle of] intrôgredo [to step in]
源自 拉丁语 intrôgressus [] intrôgredo的过去分词 [进入]
intrô- [intro-]
intrô- [前缀，表.在…内部.]
grado [to step] * see ingress
grado [跨步] *参见 ingress

【引伸】
in.trogres.sive