In recent decades, great strides have been made using various kinds of data including molecular sequences to clarify the phylogenetic relationships of nematodes. Although SSU rDNA sequences are among the most widely used markers in nematode phylogeny, there are areas within Nematoda that do not seem amenable to resolution by this single nuclear gene. The use of the complete mitochondrial genome (mitogenome) is an alternative and powerful molecular method for inferring phylogenies and is frequently used in nematodes. Here we present an overview of the contributions of mitogenome phylogenies in the phylum Nematoda. The nematode mitogenome has several practical strengths as a phylogenetic marker, and has yielded well-supported results for clades which were not well resolved using other approaches. We discuss places where nematode mitogenomes have sometimes produced alternative tree topologies compared to nuclear gene phylogenies, review to what extent mitochondrial gene order is useful in nematode phylogenetics, and make recommendations for promising future areas of research.

中文翻译：

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线虫系统发育中的线粒体基因组

近几十年来，利用包括分子序列在内的各种数据来阐明线虫的系统发育关系取得了长足的进步。尽管 SSU rDNA 序列是线虫系统发育中使用最广泛的标记之一，但线虫中的某些区域似乎无法通过这种单个核基因进行解析。使用完整的线粒体基因组（有丝分裂基因组）是推断系统发育的另一种强大的分子方法，经常用于线虫。在这里，我们概述了线虫门中丝裂基因组系统发育的贡献。线虫有丝分裂基因组作为系统发育标记具有多种实用优势，并且已经为使用其他方法无法很好解析的进化枝产生了得到充分支持的结果。