Hinton C W, Downs J E
J Hered. 1975 Nov-Dec;66(6):353-61. doi: 10.1093/oxfordjournals.jhered.a108647.
The mitotic chromosome complement of D. ananassae consists of four structurally distinguishable submetacentric pairs and all four have been identified with their linkage groups. For the polytene chromosome complement of six arms representing the X, second and third chromosomes, an improved reference map has been constructed and used to describe selected cytogenetically useful rearrangements. In meiotic prophase of spermatocytes, chromosomes 2 and 3 form pachytene-diplotene bivalents whose arms may be associated by chiasmata in postdiplotene stages, but the X, Y and fourth chromosomes participate in a complex multivalent. No correlation was detected between meiotic chromosome behavior and specific genes that regulate crossing over in males. In male inversion heterozygotes having high levels of genetically monitored crossing over, no unequivocal evidence was found for formation of either pachytene inversion loops or anaphase bridges and fragments.
菠萝果蝇的有丝分裂染色体组由四对结构上可区分的亚中着丝粒染色体组成，并且所有四对都已与它们的连锁群相对应。对于代表X、第二和第三染色体的六条臂的多线染色体组，已经构建了一份改进的参考图谱，并用于描述选定的细胞遗传学上有用的重排。在精母细胞的减数分裂前期，第二和第三染色体形成粗线期-双线期二价体，其臂在双线期后阶段可能通过交叉相连，但X、Y和第四染色体参与形成一个复杂的多价体。在减数分裂染色体行为与调节雄性交换的特定基因之间未检测到相关性。在具有高水平遗传监测交换的雄性倒位杂合子中，未发现形成粗线期倒位环或后期桥和片段的确切证据。
