A butterfly egg-killing hypersensitive response in Brassica nigra is controlled by a single locus, PEK, containing a cluster of TIR-NBS-LRR receptor genes

Niccolò Bassetti, Lotte Caarls, Klaas Bouwmeester, Patrick Verbaarschot, Ewan van Eijden, Bas Zwaan, Guusje Bonnema, Eric Schranz, Nina Fatouros*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Knowledge of plant recognition of insects is largely limited to a few resistance (R) genes against sap-sucking insects. Hypersensitive response (HR) characterizes monogenic plant traits relying on R genes in several pathosystems. HR-like cell death can be triggered by eggs of cabbage white butterflies (Pieris spp.), pests of cabbage crops (Brassica spp.), reducing egg survival and representing an effective plant resistance trait before feeding damage occurs. Here, we performed genetic mapping of HR-like cell death induced by Pieris brassicae eggs in the black mustard Brassica nigra (B. nigra). We show that HR-like cell death segregates as a Mendelian trait and identified a single dominant locus on chromosome B3, named PEK (Pieris egg- killing). Eleven genes are located in an approximately 50 kb region, including a cluster of genes encoding intracellular TIR-NBS-LRR (TNL) receptor proteins. The PEK locus is highly polymorphic between the parental accessions of our mapping populations and among B. nigra reference genomes. Our study is the first one to identify a single locus potentially involved in HR-like cell death induced by insect eggs in B. nigra. Further fine-mapping, comparative genomics and validation of the PEK locus will shed light on the role of these TNL receptors in egg-killing HR.
Original languageEnglish
Pages (from-to)1009-1022
JournalPlant, Cell & Environment
Volume47
Issue number4
Early online date14 Nov 2023
DOIs
Publication statusPublished - Apr 2024

Fingerprint

Dive into the research topics of 'A butterfly egg-killing hypersensitive response in Brassica nigra is controlled by a single locus, PEK, containing a cluster of TIR-NBS-LRR receptor genes'. Together they form a unique fingerprint.

Cite this