Boussy I A, Daniels S B
Department of Biology, Loyola University of Chicago, Illinois 60626.
Genet Res. 1991 Aug;58(1):27-34. doi: 10.1017/s0016672300029578.
Genomic patterns of occurrence of the transposable element hobo are polymorphic in the sibling species Drosophila melanogaster and D. simulans. Most tested strains of both species have apparently complete (3.0 kb) and smaller hobo elements (H lines), but in both species some strains completely lack such canonical hobo elements (E lines). The occurrence of H and E lines in D. simulans as well as in D. melanogaster implies that an hypothesis of recent introduction in the latter species is inadequate to explain the phylogenetic occurrence of hobo. Particular internally deleted elements, the approximately 1.5 kb Th1 and Th2 elements, are abundant in many lines of D. melanogaster, and an analogous 1.1 kb internally deleted element, h del sim, is abundant in most lines of D. simulans. Besides the canonical hobo sequences, both species (and their sibling species D. sechellia and D. mauritiana) have many hobo-hybridizing sequences per genome that do not appear to be closely related to the canonical hobo sequence.
转座因子hobo在黑腹果蝇和拟果蝇这两个姊妹物种中的基因组出现模式具有多态性。这两个物种的大多数测试菌株都有明显完整的（3.0 kb）和较小的hobo元件（H系），但在这两个物种中，有些菌株完全缺乏这种典型的hobo元件（E系）。hobo元件在拟果蝇以及黑腹果蝇中H系和E系的出现意味着，认为hobo是最近才引入后者物种的假设不足以解释其系统发生情况。特定的内部缺失元件，即大约1.5 kb的Th1和Th2元件，在许多黑腹果蝇品系中很丰富，而一个类似的1.1 kb内部缺失元件h del sim在大多数拟果蝇品系中很丰富。除了典型的hobo序列外，这两个物种（以及它们的姊妹物种塞舌尔果蝇和毛里求斯果蝇）每个基因组都有许多与hobo杂交的序列，这些序列似乎与典型的hobo序列没有密切关系。
