Molecular evolutionary trends and feeding ecology diversification in the Hemiptera, anchored by the milkweed bug genome
Panfilio KA, Vargas Jentzsch IM, Benoit JB and others. Genome biology, April 2019.
Read the paper Free to read · doi:10.1186/s13059-019-1660-0
What this paper is about
The genome of the large milkweed bug, at 926 million bases, placed alongside aphids and bed bugs to compare how the different feeding habits within Hemiptera evolved.
The milkweed bug is the seed feeder in that comparison, and the genome is the reference behind most laboratory work on the species.
Summarised here from the abstract below. Not the authors’ words.
Abstract
BackgroundThe Hemiptera (aphids, cicadas, and true bugs) are a key insect order, with high diversity for feeding ecology and excellent experimental tractability for molecular genetics. Building upon recent sequencing of hemipteran pests such as phloem-feeding aphids and blood-feeding bed bugs, we present the genome sequence and comparative analyses centered on the milkweed bug Oncopeltus fasciatus, a seed feeder of the family Lygaeidae.ResultsThe 926-Mb Oncopeltus genome is well represented by the current assembly and official gene set. We use our genomic and RNA-seq data not only to characterize the protein-coding gene repertoire and perform isoform-specific RNAi, but also to elucidate patterns of molecular evolution and physiology. We find ongoing, lineage-specific expansion and diversification of repressive C2H2 zinc finger proteins. The discovery of intron gain and turnover specific to the Hemiptera also prompted the evaluation of lineage and genome size as predictors of gene structure evolution. Furthermore, we identify enzymatic gains and losses that correlate with feeding biology, particularly for reductions associated with derived, fluid nutrition feeding.ConclusionsWith the milkweed bug, we now have a critical mass of sequenced species for a hemimetabolous insect order and close outgroup to the Holometabola, substantially improving the diversity of insect genomics. We thereby define commonalities among the Hemiptera and delve into how hemipteran genomes reflect distinct feeding ecologies. Given Oncopeltus's strength as an experimental model, these new sequence resources bolster the foundation for molecular research and highlight technical considerations for the analysis of medium-sized invertebrate genomes.
Abstract reproduced from the published paper, which is licensed CC BY. Copyright remains with the authors.
Key terms
Find the paper
Cite this page
This page is licensed CC BY 4.0. Quote it, adapt it and reuse it, including commercially, as long as you credit Milkweed USA and link back.
Milkweed USA. (2026). Molecular evolutionary trends and feeding ecology diversification in the Hemiptera, anchored by the milkweed bug genome (listing). Retrieved DATE, from https://milkweedusa.com/research/molecular-evolutionary-trends-and-feeding-ecology-diversification-in-the-2019/
"Molecular evolutionary trends and feeding ecology diversification in the Hemiptera, anchored by the milkweed bug genome (listing)." Milkweed USA, 2026, https://milkweedusa.com/research/molecular-evolutionary-trends-and-feeding-ecology-diversification-in-the-2019/. Accessed DATE.
Milkweed USA. "Molecular evolutionary trends and feeding ecology diversification in the Hemiptera, anchored by the milkweed bug genome (listing)." Last modified 2026-08-01. Accessed DATE. https://milkweedusa.com/research/molecular-evolutionary-trends-and-feeding-ecology-diversification-in-the-2019/.
@misc{milkweedusa_researchmolecularevolutionar,
title = {Molecular evolutionary trends and feeding ecology diversification in the Hemiptera, anchored by the milkweed bug genome (listing)},
author = {{Milkweed USA}},
year = {2026},
url = {https://milkweedusa.com/research/molecular-evolutionary-trends-and-feeding-ecology-diversification-in-the-2019/},
note = {Accessed DATE}
}