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首页> 外文期刊>Journal of experimental zoology, Part A. Comparative experimental biology >Divergent decapentaplegic expression patterns in compound eye development and the evolution of insect metamorphosis.
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Divergent decapentaplegic expression patterns in compound eye development and the evolution of insect metamorphosis.

机译：复眼发育和昆虫变态演变中的不同的十足功能性表达模式。

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摘要

In the fruit fly Drosophila, the patterning genes decapentaplegic and wingless contribute to the spatial control of retina development in an antagonistic manner. We examined the expression patterns of these genes in the developing visual system of the hemimetabolous grasshopper Schistocerca americana and the primitive holometabolous beetle species Tribolium castaneum. The pattern of wingless expression was strongly conserved as a pair of lateral domains at the anterior margins of both the developing retina and the developing optic lobes. The expression of decapentaplegic, on the other hand, is different. Unlike in Drosophila, no decapentaplegic expression was detected before the onset of photoreceptor differentiation in the retinal precursor tissue of either grasshopper or beetle. Moreover, the subsequent expression of decapentaplegic in the latter species was not concentrated in the moving front of retina differentiation, as in Drosophila, but observed in anterior and posterior regions. Our results indicate that Drosophila eye development contains elements of both ancestral and derived regulatory gene functions. The requirement for decapentaplegic as an antagonist of wingless during the early development of the Drosophila retina might have originated during the evolution of insect metamorphosis.
机译：在果蝇果蝇中，图案化的基因去能力化和无翅以拮抗的方式有助于视网膜发育的空间控制。我们检查了这些基因在美洲半透明蝗虫和原始全代谢甲虫物种Tribolium castaneum发育中的视觉系统中的表达模式。无翅的表达模式被强烈保留为在发育中的视网膜和发育中的视裂片的前缘的一对侧向区域。另一方面，十足瘫痪的表达是不同的。与果蝇不同，在蚱hopper或甲虫的视网膜前体组织中，在感光细胞分化开始之前未检测到去功能化表达。此外，在后一种物种中，后十足瘫痪的后续表达并不像果蝇那样集中在视网膜分化的运动前沿，而是在前部和后部观察到。我们的结果表明果蝇眼睛发育包含祖先和派生的调节基因功能的元素。在果蝇视网膜的早期发育过程中，对十足瘫痪作为无翼的拮抗剂的需求可能源自昆虫变态的演变。

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