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Título

Uncovering the genetic architecture of Colletotrichum lindemuthianum resistance through QTL mapping and epistatic interaction analysis in common bean

AutorGonzález Fernández, Ana María CSIC ORCID; Yuste-Lisbona, Fernando J.; Rodiño Míguez, Ana Paula CSIC ORCID; Ron Pedreira, Antonio Miguel de; Capel Salinas, Carmen; García-Alcázar, Manuel; Lozano, Rafael; Santalla Ferradás, Marta CSIC ORCID
Palabras claveAnthracnose
Epistasis
Phaseolus vulgaris L.
QTL
Resistance gene clusters
NL genes
Fecha de publicación2015
EditorFrontiers Media
CitaciónFrontiers in Plant Science 6: 141 (2015)
ResumenColletotrichum lindemuthianum is a hemibiotrophic fungal pathogen that causes anthracnose disease in common bean. Despite the genetics of anthracnose resistance has been studied for a long time, few quantitative trait loci (QTLs) studies have been conducted on this species. The present work examines the genetic basis of quantitative resistance to races 23 and 1545 of C. lindemuthianum in different organs (stem, leaf and petiole). A population of 185 recombinant inbred lines (RIL) derived from the cross PMB0225 × PHA1037 was evaluated for anthracnose resistance under natural and artificial photoperiod growth conditions. Using multi-environment QTL mapping approach, 10 and 16 main effect QTLs were identified for resistance to anthracnose races 23 and 1545, respectively. The homologous genomic regions corresponding to 17 of the 26 main effect QTLs detected were positive for the presence of resistance-associated gene cluster encoding nucleotide-binding and leucine-rich repeat (NL) proteins. Among them, it is worth noting that the main effect QTLs detected on linkage group 05 for resistance to race 1545 in stem, petiole and leaf were located within a 1.2 Mb region. The NL gene Phvul.005G117900 is located in this region, which can be considered an important candidate gene for the non-organ-specific QTL identified here. Furthermore, a total of 39 epistatic QTL (E-QTLs) (21 for resistance to race 23 and 18 for resistance to race 1545) involved in 20 epistatic interactions (eleven and nine interactions for resistance to races 23 and 1545, respectively) were identified. None of the main and epistatic QTLs detected displayed significant environment interaction effects. The present research provides essential information not only for the better understanding of the plant-pathogen interaction but also for the application of genomic assisted breeding for anthracnose resistance improvement in common bean through application of marker-assisted selection (MAS).
DescripciónThis Document is Protected by copyright and was first published by Frontiers. All rights reserved. it is reproduced with permission.
Versión del editorhttp://dx.doi.org/10.3389/fpls.2015.00141
URIhttp://hdl.handle.net/10261/113558
DOI10.3389/fpls.2015.00141
ISSN1664-462X
E-ISSN1664-462X
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