Genetic Behavior of Euchromatic Segments Inserted into Heterochromatin.
Genetic Behavior of Euchromatic Segments Inserted into Heterochromatin.
复制标题
插入异染色质的常染色质片段的遗传行为。
作者：
M. Demerec
NE型常由X射线诱发的染色体重排是一种易位，其中一段染色体从其正常位置取出并插入染色体复合体的其他部分。当这种重排发生在染色体内时，称为“转座”，当它涉及两条染色体时，称为插入易位。已经描述了许多转座和插入转座。本文将给出五个这样的情况下，其中黑腹果蝇的X染色体的常染色质片段插入异染色质区域的研究结果。以下是本文中提到的X染色体基因列表，括号中给出了它们在连锁图上的位置（BRIDGES 1938 b）：bi，bibliotype（6.9）; cm，胭脂红（18.9）; ct，切割（20.0）; 0，无横脉（13.7）; cx，curlex（13.6）; dm，小的（4.6）; dx，deltex（17.0）; EC，棘突FA，小面（3.0）; g，石榴红（44.4）; N，Notch，缺乏fa（3.0）; peb，卵石（7.3+）pn李子（0.8）; rb，红宝石（7.5）; rg，皱纹（11.5）。~），rst，roughest（1.7），T U X）roughex IS.^），SC，盾形（0. 0+））scp，铲形（18.5 5），shf，移位（17.9），sn，烧焦（21.0），vs，囊状（16.3），w，白色（1.5），y，黄色（0.0）。
NE type of viable chromosomal rearrangement frequently induced 0 by X-ray treatment is a translocation in which a piece of a chromosome is taken from its normal position and inserted into some other part of the chromosomal complex. When such a rearrangement is intrachromosoma1 the name “transposition” is applied and when it involves two chromosomes it is called an insertional translocation. A number of transpositions and insertional translocations have been described. In this paper results will be given of studies made of five such cases in which euchromatic segments of the X chromosome of Drosophila melanogaster are inserted into heterochromatic regions. Below is a list of X chromosome genes mentioned in this paper with their location on the linkage map given in parentheses (BRIDGES 1938b) : bi, bifid (6.9); cm, carmine (18.9); ct, cut (20.0); 0, crossveinless (13.7); cx, curlex (13.6); dm, diminutive (4.6); dx, deltex (17.0); ec, echinus fa, facet (3.0); g, garnet (44.4); N , Notch, deficiency for f a (3.0); peb, pebbled (7.3+) pn prune (0.8); rb, ruby (7.5); rg, rugose ( I I . ~ ) , rst, roughest (1.7), T U X ) roughex IS.^), SC, scute (o.o+) ) scp, scooped (18.5 5 ) , shf, shifted (17.9), sn, singed (21.0), vs, vesiculated (16.3), w, white (1 .5) , y, yellow (0.0).