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对“背甲”基因的遗传分析,“背甲”基因是果蝇中背侧组织存活和刚毛定位所必需的基因。

A genetic analysis of pannier, a gene necessary for viability of dorsal tissues and bristle positioning in Drosophila.

作者信息

Heitzler P, Haenlin M, Ramain P, Calleja M, Simpson P

机构信息

Institut de Genetique et de Biologie Moleculaire et Cellulaire, Illkirch, France.

出版信息

Genetics. 1996 Jul;143(3):1271-86. doi: 10.1093/genetics/143.3.1271.

Abstract

A genetic and phenotypic analysis of the gene pannier is described. Animals mutant for strong alleles die as embryos in which the cells of the amnioserosa are prematurely lost. This leads to a dorsal cuticular hole. The dorsal-most cells of the imagos are also affected: viable mutants exhibit a cleft along the dorsal midline. pannier mRNA accumulates specifically in the dorsal-most regions of the embryo and the imaginal discs. Viable mutants and mutant combinations also affect the thoracic and head bristle patterns in a complex fashion. Only those bristles within the area of expression of pannier are affected. A large number of alleles have been studied and reveal that pannier may have opposing effects on the expression of achaete and scute leading to a loss or a gain of bristles.

摘要

本文描述了对基因“背兜”的遗传和表型分析。强等位基因突变的动物在胚胎期死亡,此时羊膜浆膜的细胞过早丢失,导致背部表皮出现孔洞。成虫最背部的细胞也受到影响:存活的突变体在背中线处出现裂缝。“背兜”mRNA特异性地在胚胎和成虫盘的最背部区域积累。存活的突变体和突变体组合也以复杂的方式影响胸部和头部刚毛的模式,只有在“背兜”表达区域内的刚毛受到影响。已经研究了大量的等位基因,结果表明“背兜”可能对“无刚毛”和“具刚毛”基因的表达有相反的影响,导致刚毛的丢失或增加。

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