在Elateroidea超级家族中Opsin多样性和进化:从转录组数据的洞察力
Danilo T Amaral1,2, Isabel A S Bonatelli3
1Centro de Ciências Naturais e Humanas, Universidade Federal do ABC (UFABC), São Paulo, Brazil.
Insect molecular biology
|October 14, 2023
概括
研究人员在elateroidea甲虫中探索了素基因多样性,发现了紫外线 (UV) 和长波长 (LW) 素中的基因重复和损失. 这些变化可能会影响这种昆虫群体的视觉和生物发光进化.
科学领域:
- 进化生物学是进化的生物学.
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 视力依赖于素蛋白和染色体,基因重复/损失塑造光谱灵敏度.
- 科莱奥普特拉的Elateroidea超级家族是多样化的,包括生物发光物种,这使得它成为虫进化研究的关键模型.
- 之前对Elateroidea的opsin研究主要集中在Lampyridae和Elateridae上,并没有研究其他家族.
研究的目的:
- 使用现有的转录组数据,研究elateroidea超级家族内的素基因的多样性.
- 为了确定基因重复和损失在紫外线 (UV) 和长波长 (LW) -opsin类在elateroidea.
- 检查素基因的阳性选择证据,特别是与染色体结合和光谱调有关的证据.
主要方法:
- 使用了来自各种elateroidea物种 (elateridae,lampyridae,phengodidae,reghophthalmidae,cantharidae,lycidae) 的转录组数据集.
- 检测和分析假设的素基因多样性,包括副本数变异和表达模式.
- 进行了选择分析,以确定UV和LW-opsin基因中受阳性选择的部位.
主要成果:
- 观察到素基因重复和损失,包括虫虫虫中没有紫外线素.
- 在火虫部落中鉴定出明显的LW-opsin副本,眼睛表情很高,这表明它们在性信号传递中的作用.
- 在生物发光的Elateridae物种中发现了一个独特的LW-opsin副本,表明了重复和损失事件.
- 在染色体结合部位附近检测到一个在阳性选择下单一的残留物,可能导致光谱转移.
结论:
- 在Elateroidea中,Opsin基因演变的特点是重复和丢失事件,这有助于视觉系统的多样性.
- LW-opsin拷贝数的变化可能与火虫视觉交流和性选择的演变有关.
- 在Elateridae中,特定的素基因变化可能与生物发光的演变有关.
- 在积极选择下保存的位置表明功能限制和潜在的光谱调整在Elateroidea视力.
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