Chromosome-level genome of black cutworm provides novel insights into polyphagy and seasonal migration in insects
Posted on 2023-04-13 - 12:28
Abstract Background The black cutworm, Agrotis ipsilon, is a serious global underground pest. Its distinct phenotypic traits, especially its polyphagy and ability to migrate long distances, contribute to its widening distribution and increasing difficulty of control. However, knowledge about these traits is still limited. Results We generated a high-quality chromosome-level assembly of A. ipsilon using PacBio and Hi-C technology with a contig N50 length of ~ 6.7 Mb. Comparative genomic and transcriptomic analyses showed that detoxification-associated gene families were highly expanded and induced after insects fed on specific host plants. Knockout of genes that encoded two induced ABC transporters using CRISPR/Cas9 significantly reduced larval growth rate, consistent with their contribution to host adaptation. A comparative transcriptomic analysis between tethered-flight moths and migrating moths showed expression changes in the circadian rhythm gene AiCry2 involved in sensing photoperiod variations and may receipt magnetic fields accompanied by MagR and in genes that regulate the juvenile hormone pathway and energy metabolism, all involved in migration processes. Conclusions This study provides valuable genomic resources for elucidating the mechanisms involved in moth migration and developing innovative control strategies.
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Jin, Minghui; Liu, Bo; Zheng, Weigang; Liu, Conghui; Liu, Zhenxing; He, Yuan; et al. (2023). Chromosome-level genome of black cutworm provides novel insights into polyphagy and seasonal migration in insects. figshare. Collection. https://doi.org/10.6084/m9.figshare.c.6586666.v1
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AUTHORS (18)
MJ
Minghui Jin
BL
Bo Liu
WZ
Weigang Zheng
CL
Conghui Liu
ZL
Zhenxing Liu
YH
Yuan He
XL
Xiaokang Li
CW
Chao Wu
PW
Ping Wang
KL
Kaiyu Liu
SW
Shigang Wu
HL
Hangwei Liu
SC
Swapan Chakrabarty
HY
Haibin Yuan
KW
Kenneth Wilson
KW
Kongming Wu
WF
Wei Fan
YX
Yutao Xiao