数字农科院2.0

A supergene controls facultative diapause in the crop pest Helicoverpa armigera

文献类型： 外文期刊

作者： Minghui Jin;Yan Peng;Jie Peng;Songmiao Yu;Chao Wu;Xianming Yang;Jingyun Zhu;Oscar Infante;Qi Xu;Hongru Wang;Kongming Wu;Yutao Xiao

作者机构：

关键词： （1-1-1）chromosomal inversion;CP: Developmental biology;CP: Molecular biology;diapause;Helicoverpa armigera;supergene

期刊名称： Cell Reports

ISSN： 2639-1856

年卷期： 2024 年 43 卷 11 期

页码：

收录情况： SCIE（2024版）

摘要： Many insect species, including the economically important pest Helicoverpa armigera, avoid unfavorable conditions by suspending development. This form of phenotypic plasticity—facultative diapause—is a complex trait, though its evolution and intricate genetic architecture remain poorly understood. To investigate how such a polygenic trait could be locally adapted, we explore its genetic architecture. We map a large-effect diapause-associated locus to the Z chromosome by crossing high- and low-latitude populations. By generating multiple chromosome-scale assemblies, we identify an ∼5.93-Mb chromosomal inversion that constitutes the locus. Within this inversion, 33 genes harbor divergent non-synonymous mutations, notably including three circadian rhythm genes: Period, Clock, and Cycle. CRISPR-Cas9 knockout experiments confirm that each gene is independently essential for pupal diapause. Thus, a diapause supergene arose within H. armigera via a Z chromosome inversion, enabling local climatic adaptation in this economically important crop pest.

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