Ullerich F H
Zoologisches Institut, Universität Kiel, Germany.
Mol Gen Genet. 1996 Nov 27;253(1-2):232-41. doi: 10.1007/s004380050317.
Four new genetic markers for Chrysomya rufifacies, a fly with maternal sex determination, were characterized. The markers include one body colour mutant, black body (bl), and three eye colour mutants, brown eye (br), apricot eye (ap), and red eye (wr). Two of the latter, br and wr, turn out to be sex linked, the others behave as autosomal genes belonging to different linkage groups. wr is a hypomorphic and w an apomorphic mutation of the white gene, w/w is epistatic to br/br and to ap/ap. A preliminary genetic linkage map with the sex realizer F'/f and the loci br and w residing in homomorphic sex chromosomes is established. Evidence is presented that crossing over is absent in the male sex. The possible causes of the spontaneous appearance of mosaics for eye colour observed among individuals heterozygous for recessive genes are discussed.
对具有母性性别决定的红头丽蝇的四个新遗传标记进行了表征。这些标记包括一个体色突变体，黑体（bl），以及三个眼色突变体，褐眼（br）、杏眼（ap）和红眼（wr）。后两者中的br和wr结果表明是性连锁的，其他的表现为属于不同连锁群的常染色体基因。wr是白色基因的一个亚效突变，而w是一个超效突变，w/w对br/br和ap/ap是上位性的。构建了一个初步的遗传连锁图谱，其中性别实现者F'/f以及br和w位点位于同形性染色体上。有证据表明雄性不存在交叉互换。讨论了在隐性基因杂合个体中观察到的眼色嵌合体自发出现的可能原因。
