Tucker P K
Cytogenet Cell Genet. 1986;43(1-2):19-27. doi: 10.1159/000132293.
Mitotic analyses using RBA- and C-banding were performed on Stenodermatine bats with X-autosome (XY1Y2) and X- and Y- autosome (neo-XY) translocations. RBA-banded metaphases of females revealed differential replication of the inactive X chromosome. An early replicating band comprises the short arm of the X, and an intermediate replicating band is located interstitially on the long arm. The early replicating short arm has a homologous counterpart either in the form of a free autosome (the Y2) or as part of the Y. Both the "autosomal" short arm of the X and its homologue fused to the Y are C-band negative and behave autonomously from the remainder of the sex chromosomes. They are separated from X and Y chromatin by centromeric heterochromatin which presumably acts as a barrier. The intermediate replicating region of the long arm of the X is also present in the subfamily Phyllostominae. In both subfamilies this region lacks a homologous counterpart. However, it may also represent a translocated autosome which, unlike the short arm of the X, is not separated from the inactive X by centromeric heterochromatin. Its intermediate replication time may represent a retarded replication due to its juxtaposition to late replicating X chromatin. These data are discussed in light of the theory of the evolution of sex chromosome heteromorphism, specifically as it applies to mammals.
利用RBA和C带技术对具有X - 常染色体（XY1Y2）和X - 与Y - 常染色体（neo - XY）易位的食果蝠进行了有丝分裂分析。雌性的RBA带型中期显示了失活X染色体的差异复制。一条早期复制带包括X染色体的短臂，一条中期复制带位于长臂的中间位置。早期复制的短臂有一个同源对应物，其形式要么是一条游离的常染色体（Y2），要么是Y染色体的一部分。X染色体的“常染色体样”短臂及其与Y染色体融合的同源物都是C带阴性，并且与性染色体的其余部分自主行为。它们通过可能起屏障作用的着丝粒异染色质与X和Y染色质分开。X染色体长臂的中期复制区域在叶口蝠亚科中也存在。在这两个亚科中，该区域都没有同源对应物。然而，它也可能代表一条易位的常染色体，与X染色体的短臂不同，它没有通过着丝粒异染色质与失活的X染色体分开。其中期复制时间可能是由于它与晚期复制的X染色质并列而导致的延迟复制。根据性染色体异形性进化理论，特别是应用于哺乳动物的理论，对这些数据进行了讨论。
