Esbenshade P R, Triantaphyllou A C
J Nematol. 1987 Jan;19(1):8-18.
Thirty populations of Meloidogyne of diverse geographic origin representing 10 nominal species and various reproductive, cytological, and physiological forms known to exist in the genus were examined to determine their enzymatic relationships. The 184 bands resolved in the study of 27 enzymes were considered as independent characters. Pair-wise comparisons of populations were performed in all possible combinations to estimate the enzymatic distances (ED) and coefficients of similarity (S). A phylogenetic tree was constructed. The apomictic species M. arenaria, M. microcephala, M. javanica, and M. incognita shared a common lineage. M. arenaria was highly polytypic, whereas conspecific populations of M. javanica and M. incognita were largely monomorphic. The mitotic and meiotic forms of M. hapla were very similar (S = 0.93), suggesting that the apomictic race B evolved only recently from the meiotic race A. The five remaining meiotic species (M. chitwoodi, M. graminicola, M. graminis, M. microtyla, and M. naasi - each represented by a single population) were not closely related to each other or to the mitotic species.
对代表10个名义种以及该属中已知存在的各种生殖、细胞学和生理类型的30个不同地理来源的根结线虫种群进行了研究，以确定它们的酶学关系。在对27种酶的研究中解析出的184条带被视为独立性状。对所有可能组合的种群进行成对比较，以估计酶促距离（ED）和相似系数（S）。构建了系统发育树。孤雌生殖种花生根结线虫、小头根结线虫、爪哇根结线虫和南方根结线虫具有共同的谱系。花生根结线虫具有高度多型性，而爪哇根结线虫和南方根结线虫的同种种群在很大程度上是单型的。燕麦真滑刃线虫的有丝分裂型和减数分裂型非常相似（S = 0.93），这表明孤雌生殖的B小种是最近才从减数分裂的A小种进化而来的。其余五个减数分裂种（奇氏根结线虫、禾本科根结线虫、小麦粒线虫、小尾根结线虫和纳氏根结线虫——每个种仅由一个种群代表）彼此之间或与有丝分裂种之间没有密切关系。
