求翻译：Castleden 等（2004）推测，由于D族基因和A族基因在基因结构和序列上具有一定的相似性，且进化分析表明D族基因与A族基因的亲缘关系也高于与B、C族的亲缘关系，由此认为D族基因可能是由A族基因分化出来的，且出现单子叶和双子叶植物的分化后产生的，并进过复制产生了两个D型亚族。是什么意思？

castleden (2004) speculated that the d family of genes and a family of genes have a certain similarity in gene structure and sequence and phylogenetic analysis showed that the d family of genes and the genetic relationship of a family of genes also higher than the a and b, and c family affinity, thu

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Castleden and so on (2004) extrapolation, because the D race gene and the A race gene has certain similarity in the gene structure and the sequence, also the evolution analysis indicated the D race gene and the A race gene blood relationship relations is also higher than with B, the C race's blood r

Castleden, (2004) speculated, due to d family gene and-a family gene in gene structure and sequence Shang has must of similar sexual, and evolution analysis indicates that d family gene and-a family gene of genetic relationship also than and b, and c family of genetic relationship, this think d fami

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