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Tytuł pozycji:

A multi-parent recombinant inbred line population of C. elegans allows identification of novel QTLs for complex life history traits

Tytuł:
A multi-parent recombinant inbred line population of C. elegans allows identification of novel QTLs for complex life history traits
Autorzy:
Basten L. Snoek
Rita J. M. Volkers
Harm Nijveen
Carola Petersen
Philipp Dirksen
Mark G. Sterken
Rania Nakad
Joost A. G. Riksen
Philip Rosenstiel
Jana J. Stastna
Bart P. Braeckman
Simon C. Harvey
Hinrich Schulenburg
Jan E. Kammenga
Temat:
Multi-parent RILs
C. elegans
QTL
Life-history
Natural variation
Genetic map
Biology (General)
QH301-705.5
Źródło:
BMC Biology, Vol 17, Iss 1, Pp 1-17 (2019)
Wydawca:
BMC, 2019.
Rok publikacji:
2019
Kolekcja:
LCC:Biology (General)
Typ dokumentu:
article
Opis pliku:
electronic resource
Język:
English
ISSN:
1741-7007
Relacje:
http://link.springer.com/article/10.1186/s12915-019-0642-8; https://doaj.org/toc/1741-7007
DOI:
10.1186/s12915-019-0642-8
Dostęp URL:
https://doaj.org/article/7fb2c087b63d478ab2abcfa8643e7262  Link otwiera się w nowym oknie
Numer akcesji:
edsdoj.7fb2c087b63d478ab2abcfa8643e7262
Czasopismo naukowe
Abstract Background The nematode Caenorhabditis elegans has been extensively used to explore the relationships between complex traits, genotypes, and environments. Complex traits can vary across different genotypes of a species, and the genetic regulators of trait variation can be mapped on the genome using quantitative trait locus (QTL) analysis of recombinant inbred lines (RILs) derived from genetically and phenotypically divergent parents. Most RILs have been derived from crossing two parents from globally distant locations. However, the genetic diversity between local C. elegans populations can be as diverse as between global populations and could thus provide means of identifying genetic variation associated with complex traits relevant on a broader scale. Results To investigate the effect of local genetic variation on heritable traits, we developed a new RIL population derived from 4 parental wild isolates collected from 2 closely located sites in France: Orsay and Santeuil. We crossed these 4 genetically diverse parental isolates to generate a population of 200 multi-parental RILs and used RNA-seq to obtain sequence polymorphisms identifying almost 9000 SNPs variable between the 4 genotypes with an average spacing of 11 kb, doubling the mapping resolution relative to currently available RIL panels for many loci. The SNPs were used to construct a genetic map to facilitate QTL analysis. We measured life history traits such as lifespan, stress resistance, developmental speed, and population growth in different environments, and found substantial variation for most traits. We detected multiple QTLs for most traits, including novel QTLs not found in previous QTL analysis, including those for lifespan and pathogen responses. This shows that recombining genetic variation across C. elegans populations that are in geographical close proximity provides ample variation for QTL mapping. Conclusion Taken together, we show that using more parents than the classical two parental genotypes to construct a RIL population facilitates the detection of QTLs and that the use of wild isolates facilitates the detection of QTLs. The use of multi-parent RIL populations can further enhance our understanding of local adaptation and life history trade-offs.
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