Drosophila suzukii is native to East and Southeast Asia and spread very fast around the world being considered an invasive pest species. Many demographic, population genetics and genomic studies have been recently developed, but so far no analysis has been carried out regarding the presence of chromosomal inversions in D. suzukii natural populations. In this research, we studied polytene chromosomes of flies collected from the Font Groga (Barcelona) population. The chromosomes and many of their segments were characterized for their similarity with those from D. melanogaster . This is the report of one paracentric inversion (in heterozygous condition) in the right arm of the third chromosome (3R). As far as we know, it is the first time that an inversion has been observed in a D. suzukii natural population. Finally, the evolutionary significance of the finding of inversions in this species is discussed.

中文翻译：

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在入侵性害虫 Drosophila suzukii 的自然种群中首次检测到染色体倒位

铃木果蝇原产于东亚和东南亚，在世界范围内传播速度非常快，被认为是一种入侵性害虫。最近开展了许多人口统计学、群体遗传学和基因组研究，但到目前为止，还没有对 D. suzukii 自然群体中是否存在染色体倒位进行分析。在这项研究中，我们研究了从 Font Groga（巴塞罗那）种群中收集的果蝇的多线染色体。染色体及其许多片段的特征在于它们与黑腹果蝇的相似。这是第三条染色体 (3R) 右臂的一个旁着丝粒倒位（杂合状态）的报告。据我们所知，这是首次在 D. suzukii 自然种群中观察到反转。最后，