Petrova N A, Chubareva L A, Adler P N, Kachvorian E A
Zoological Institute, Russian Academy of Sciences, St. Petersburg, 199034 Russia.
Genetika. 2003 Jan;39(1):41-50.
Three blackfly Wilhelmia paraequina populations of Armenia (rivers Debet and Megriget, channel Megri) were studied. 2n = 6: IS + IIL, IIS + IL, IIIS + IIIL. Cytological maps of polytene chromosomes were constructed. High inversion polymorphism (95.63%) was observed, with 2.6 inversions per individual. Three inversions proved to be associated with male development: Y1 was characterized by a combination of two heterozygous inversions, IIL-3 + IIL-1, while Y2 had another combination of heterozygous inversions, IIL-5 + IIL-3. The X chromosome had a standard homozygous IIL disk sequence. The populations were shown to be similar in autosomal polymorphism. A tendency for differentiation was observed with respect to frequencies and types of sex-linked inversions: the sex determination system was Y1X-XX in the Debet and Megriget populations and Y2X-XX in the channel (Megri) population. On the strength of these findings, one W. paraequina morphotype was assumed to involve two cytotypes, A (Debet and Megriget populations) and B (Megri population).
对亚美尼亚的三个黑蝇类拟马威廉氏种群（德贝特河和梅格里格特河、梅格里河河道）进行了研究。2n = 6：IS + IIL、IIS + IL、IIIS + IIIL。构建了多线染色体的细胞学图谱。观察到高倒位多态性（95.63%），每个个体有2.6个倒位。已证明有三个倒位与雄性发育相关：Y1的特征是两个杂合倒位IIL - 3 + IIL - 1的组合，而Y2有另一种杂合倒位组合IIL - 5 + IIL - 3。X染色体具有标准的纯合IIL盘序列。这些种群在常染色体多态性方面表现出相似性。在性连锁倒位的频率和类型方面观察到分化趋势：德贝特河和梅格里格特河种群的性别决定系统是Y1X - XX，而河道（梅格里河）种群的是Y2X - XX。基于这些发现，假定一种拟马威廉氏形态型涉及两种细胞型，A（德贝特河和梅格里格特河种群）和B（梅格里河种群）。
