Engineered sex distortion in the global agricultural pest Ceratitis capitata

Engineered sex distortion in the global agricultural pest Ceratitis capitata
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全球农业害虫Ceratitis headata的性别扭曲

DOI:
10.1101/2020.08.07.240226
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发表时间:
2020
期刊:
--
影响因子:
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通讯作者:
Meccariello A
Meccariello A
中科院分区:
--
文献类型:
--
作者:
Meccariello A

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遗传性比扭曲有可能在整个地区控制有害昆虫种群。靶向X染色体并且其活性限于雄性配子发生的核酸内切酶最近已被开创作为工程化这些性状的手段。在这里,我们在地中海实蝇Ceratitis capitata的精子发生过程中启用了内源性CRISPR/Cas9和CRISPR/Cas 12 a活性,Ceratitis capitata是一种具有广泛经济意义的全球农业害虫。在没有染色体水平组装的情况下,我们分析了来自男性和女性的长和短读基因组测序数据,以鉴定两组丰富的X染色体特异性序列重复。当被gRNA与Cas9结合靶向时,它们在独立的转基因株系中产生了显著且一致的性别比扭曲,并且扭曲物的组合诱导了对雄性的强烈偏好(~80%)。我们的研究结果表明,在非模式生物的性别扭曲的设计,并建议菌株的特点适合现场应用,可以开发一系列的医学或农业相关的昆虫物种。
Genetic sex ratio distorters have potential for the area-wide control of harmful insect populations. Endonucleases targeting the X-chromosome and whose activity is restricted to male gametogenesis have recently been pioneered as a means to engineer such traits. Here we enabled endogenous CRISPR/Cas9 and CRISPR/Cas12a activity during spermatogenesis of the Mediterranean fruit flyCeratitis capitata, a worldwide agricultural pest of extensive economic significance. In the absence of a chromosome-level assembly, we analysed long and short-read genome sequencing data from males and females to identify two clusters of abundant and X-chromosome specific sequence repeats. When targeted by gRNAs in conjunction with Cas9 they yielded a significant and consistent distortion of the sex ratio in independent transgenic strains and a combination of distorters induced a strong bias towards males (~80%). Our results demonstrate the design of sex distorters in a non-model organism and suggest that strains with characteristics suitable for field application could be developed for a range of medically or agriculturally relevant insect species.
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