Verticillium dahliae Disease Resistance and the Regulatory Pathway for Maturity and Tuberization in Potato

Verticillium dahliae Disease Resistance and the Regulatory Pathway for Maturity and Tuberization in Potato

Core Ideas Verticillium wilt resistance is linked to control of tuberization in potato. The StCDF1 tuberization gene is epistatic to the Ve2 resistance gene. eQTL can be used to examine gene networks for complex traits. Verticillium dahliae Kleb. is a pathogenic fungus causing wilting, chlorosis, an...

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Published in:The plant genome Vol. 11; no. 1; pp. 1 - 15
Main Authors: Tai, Helen H., De Koeyer, David, Sønderkær, Mads, Hedegaard, Sanne, Lagüe, Martin, Goyer, Claudia, Nolan, Lana, Davidson, Charlotte, Gardner, Kyle, Neilson, Jonathan, Paudel, Jamuna Risal, Murphy, Agnes, Bizimungu, Benoit, Wang, Hui Ying, Xiong, Xingyao, Halterman, Dennis, Nielsen, Kåre Lehmann
Format: Journal Article
Language:English
Published: United States Crop Science Society of America 01-03-2018
John Wiley & Sons, Inc
Wiley
Subjects:
Alleles
Chloroplasts
Chromosome 5
Chromosome 9
Cloning
Diploids
Disease resistance
Epistasis
Gene expression
Gene mapping
Genomes
Infections
Maturity
Pathogens
Photosynthesis
Polymerase chain reaction
Proteins
Quantitative trait loci
Solanum tuberosum
Transcription factors
Verticillium
Verticillium dahliae
Verticillium wilt
Wilting
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Summary:Core Ideas Verticillium wilt resistance is linked to control of tuberization in potato. The StCDF1 tuberization gene is epistatic to the Ve2 resistance gene. eQTL can be used to examine gene networks for complex traits. Verticillium dahliae Kleb. is a pathogenic fungus causing wilting, chlorosis, and early dying in potato (Solanum tuberosum L.). Genetic mapping of resistance to V. dahliae was done using a diploid population of potato. The major quantitative trait locus (QTL) for Verticillium resistance was found on chromosome 5. The StCDF1 gene, controlling earliness of maturity and tuberization, was mapped within the interval. Another QTL on chromosome 9 co‐localized with the Ve2 Verticillium wilt resistance gene marker. Epistasis analysis indicated that the loci on chromosomes 5 and 9 had a highly significant interaction, and that StCDF1 functioned downstream of Ve2. The StCDF1 alleles were sequenced and found to encode StCDF1.1 and StCDF1.3. Interaction between the Ve2 resistance allele and the StCDF1.3 was demonstrated, but not for StCDF1.1. Genome‐wide expression QTL (eQTL) analysis was performed and genes with eQTL at the StCDF1 and Ve2 loci were both found to have similar functions involving the chloroplast, including photosynthesis, which declines in both maturity and Verticillium wilt. Among the gene ontology (GO) terms that were specific to genes with eQTL at the Ve2, but not the StCDF1 locus, were those associated with fungal defense. These results suggest that Ve2 controls fungal defense and reduces early dying in Verticillium wilt through affecting genetic pathway controlling tuberization timing.
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content type line 23
ISSN:1940-3372
1940-3372
DOI:10.3835/plantgenome2017.05.0040