CELL LINEAGE OF IMAGINAL DISCS IN DROSOPHILA GYNANDROMORPHS
CELL LINEAGE OF IMAGINAL DISCS IN DROSOPHILA GYNANDROMORPHS
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DOI：
10.1002/jez.1401700106
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发表时间：
1969-01-01
影响因子：
--
通讯作者：
MERRIAM, JR
中科院分区：
文献类型：
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作者：
GARCIABELLIDO, A;MERRIAM, JR
收集了379幅D. simulansclaret gynandromorphs，由A. H.斯图尔特万特，以分析成人表皮结构的细胞谱系。标记表型分叉的刚毛或黄色的体色被用来追踪雄性组织。不同的成虫盘内的镶嵌程度被用来估计胚盘细胞核的数量，其后代在每一侧形成原始的成虫盘。估计复眼触角盘有23只，翅盘有12只，第一和第二腿盘有几只，前胸、第三腿和腹部盘各有1只。两个部分按性别分开的频率，一个男性和一个女性，被认为与他们胚胎血统的接近程度成反比。用这种方法构建了胚胎一侧头、胸和腹的相对位置的形态发生图。在形态发生图中推测部位的位置与成人体表各部位的相对位置相同。提出了将形态发生图放置在卵的三维表面上的论点。这些数据是一致的模型，即未来的成人结构的形态发生图占据了沿两侧的胚胎表面的中间带。Poulson（'50）的卵平面图也将假定的幼虫皮下组织放在这个位置。该模型被认为是相对于标记早期胚胎阶段的实验证据。
A collection of 379 drawings ofD. simulansclaret gynandromorphs, kindly supplied to the authors by Dr. A. H. Sturtevant, was used in order to analyze the cell lineage of the adult cuticular structures. The marker phenotypes forked bristles or yellow body color were used to trace the male tissue. The degree of mosaicism within the different imaginal discs was used to estimate the number of blastoderm nuclei whose descendants form the primitive imaginal discs on each side. The estimates are 23 for the compound‐eye‐antennal discs, 12 for the wing disc, several for the first and second leg discs and perhaps 1 for each of the prothoracic, third leg and abdominal discs. The frequency with which two parts are separated by sex, one male and one female, is assumed to vary inversely with the closeness of their embryonic descent. In this way were constructed the morphogenetic maps of the relative locations on one side of the embryo of the presumptive head, thoracic and abdominal adult structures. Locations of the presumptive parts within the morphogenetic maps are the same as the relative positions of the parts on the adult surface. Arguments are presented to place the morphogenetic map on the three‐dimensional surface of the egg. The data are consistent with the model that the morphogenetic map of the prospective adult structures occupies a medial band along both sides of the embryo surface. Poulson's ('50) ground plan of the egg also places the presumptive larval hypodermis in this location. This model is considered relative to the experimental evidence marking the early embryo stages.