A genome-wide library of CB4856/N2 introgression lines of Caenorhabditis elegans

A. Doroszuk, L.B. Snoek, E. Fradin, J.A.G. Riksen, J.E. Kammenga

Research output: Contribution to journalArticleAcademicpeer-review

68 Citations (Scopus)

Abstract

Recombinant inbred lines (RILs) derived from Caenorhabditis elegans wild-type N2 and CB4856 are increasingly being used for mapping genes underlying complex traits. To speed up mapping and gene discovery, introgression lines (ILs) offer a powerful tool for more efficient QTL identification. We constructed a library of 90 ILs, each carrying a single homozygous CB4856 genomic segment introgressed into the genetic background of N2. The ILs were genotyped by 123 single-nucleotide polymorphism (SNP) markers. The proportion of the CB4856 segments in most lines does not exceed 3%, and together the introgressions cover 96% of the CB4856 genome. The value of the IL library was demonstrated by identifying novel loci underlying natural variation in two ageing-related traits, i.e. lifespan and pharyngeal pumping rate. Bin mapping of lifespan resulted in six QTLs, which all have a lifespan-shortening effect on the CB4856 allele. We found five QTLs for the decrease in pumping rate, of which four colocated with QTLs found for average lifespan. This suggests pleiotropic or closely linked QTL associated with lifespan and pumping rate. Overall, the presented IL library provides a versatile resource toward easier and efficient fine mapping and functional analyses of loci and genes underlying complex traits in C. elegans
Original languageEnglish
Pages (from-to)e110
Number of pages7
JournalNucleic acids research
Volume37
Issue number16
DOIs
Publication statusPublished - 2009

Keywords

  • quantitative trait locus
  • life-history traits
  • genotype-environment interactions
  • natural variation
  • c-elegans
  • consomic strains
  • complex traits
  • qtl
  • architecture
  • polymorphism

Fingerprint

Dive into the research topics of 'A genome-wide library of CB4856/N2 introgression lines of Caenorhabditis elegans'. Together they form a unique fingerprint.

Cite this