A complex interplay of tandem- and whole genome duplication drives expansion of the L-type lectin receptor kinase gene family in the brassicaceae

J.A. Hofberger, D.L. Nsibo, F. Govers, K. Bouwmeester, M.E. Schranz

Research output: Contribution to journalArticleAcademicpeer-review

29 Citations (Scopus)

Abstract

The comparative analysis of plant gene families in a phylogenetic framework has greatly accelerated due to advances in next generation sequencing. In this study, we provide an evolutionary analysis of the L-type lectin receptor kinase and L-type lectin domain proteins (L-type LecRKs and LLPs) that are considered as components in plant immunity, in the plant family Brassicaceae and related outgroups. We combine several lines of evidence provided by sequence homology, HMM-driven protein domain annotation, phylogenetic analysis and gene synteny for large-scale identification of L-type LecRK and LLP genes within nine core-eudicot genomes. We show that both polyploidy and local duplication events (tandem duplication and gene transposition duplication) have played a major role in L-type LecRK and LLP gene family expansion in the Brassicaceae. We also find significant differences in rates of molecular evolution based on the mode of duplication. Additionally, we show that LLPs share a common evolutionary origin with L-type LecRKs and provide a consistent gene family nomenclature. Finally, we demonstrate that the largest and most diverse L-type LecRK clades are lineage-specific. Our evolutionary analyses of these plant immune components provide a framework to support future plant resistance breeding.
Original languageEnglish
Pages (from-to)720-734
JournalGenome Biology and Evolution
Volume7
Issue number3
DOIs
Publication statusPublished - 2015

Keywords

  • disease resistance genes
  • arabidopsis-thaliana
  • phylogenetic analysis
  • triggered immunity
  • provides insight
  • wide analysis
  • evolution
  • plants
  • diversification
  • expression

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