Characteristics of RDGA: Mutants with retinal degeneration in Drosophila

Characteristics of RDGA: Mutants with retinal degeneration in Drosophila
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RDGA 的特征:果蝇视网膜变性突变体

DOI:
10.1016/0022-1910(82)90082-8
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发表时间:
1982
影响因子:
2.2
通讯作者:
W. S. Stark
W. S. Stark
中科院分区:
农林科学3区
文献类型:
--
作者:
Mary A. Johnson;Karen L. Frayer;W. S. Stark

文献摘要

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我们利用组织学、光学、深部伪瞳孔技术、电生理学和趋光测试来表征果蝇中基因视网膜变性 A (rdgA) 的突变体。早期的工作表明,不同的突变等位基因在 R7 和 R8(复眼中每个面 8 个细胞的 2 种受体类型)是否退化方面存在差异。我们研究了一个弱简并等位基因(没有太多 R 7 8 简并),即 rdgA PC47,以及一个强突变等位基因 rdgA BS12。我们的技术都表明,rdgA BS12 的退化更为严重,不仅对于 R 7 8,而且对于 R1-6 和单眼也是如此。我们确认 rdgA PC47 中 R 7 8 的简并速度比 R1-6 慢。不同基因(即 rdgB)的突变体已广泛用于视觉系统的研究。尽管 rdgA 中的视网膜变性很严重,但 rdgA 中的第一个突触神经纤维仍然比 rdgB 中的更接近正常。
We have characterized mutants of the gene retinal degeneration A (rdgA) in Drosophila using histology, optics, deep pseudopupil techniques, electrophysiology and phototactic testing. Earlier work showed that different mutant alleles differed in whether R7 and R8 (2 receptor types of 8 cells per facet in the compound eye) degenerated. We studied a weakly degenerate allele (without much R 7 8 degeneration), namely rdgA PC47, and a strongly mutant allele, rdgA BS12. Our techniques all show that degeneration is more severe in rdgA BS12, not only for R 7 8 but for R1-6 and ocelli as well. We confirm that R 7 8 degenerates more slowly than R1–6 in rdgA PC47. Mutants of a different gene, namely rdgB, have been widely used in studies of the visual system. Although retinal degeneration is severe in rdgA, the first synaptic neuropil in rdgA remains much more nearly normal than it does in rdgB.