RT Journal Article
T1 Mapping of resistance to corn borers in a MAGIC population of maize
A1 Jiménez Galindo, José Cruz
A1 Malvar, Rosa Ana
A1 Butrón Gómez, Ana María
A1 Santiago Carabelos, Rogelio
A1 Samayoa, Luis Fernando
A1 Caicedo, Marlon
A1 Ordás, Bernardo
K1 3103.04 Protección de Los Cultivos
K1 2417.09 Fitopatología
K1 3103 Agronomía
AB Background: Corn borers constitute an important pest of maize around the world; in particular Sesamianonagrioides Lefèbvre, named Mediterranean corn borer (MCB), causes important losses in Southern Europe.Methods of selection can be combined with transgenic approaches to increase the efficiency and durability of theresistance to corn borers. Previous studies of the genetic factors involved in resistance to MCB have been carriedout using bi-parental populations that have low resolution or using association inbred panels that have a lowpower to detect rare alleles. We developed a Multi-parent Advanced Generation InterCrosses (MAGIC) population tomap with high resolution the genetic determinants of resistance to MCB.Results: We detected multiple single nucleotide polymorphisms (SNPs) of low effect associated with resistance tostalk tunneling by MCB. We dissected a wide region related to stalk tunneling in multiple studies into three smallerregions (at ~ 150, ~ 155, and ~ 165 Mb in chromosome 6) that closely overlap with regions associated with cell wallcomposition. We also detected regions associated with kernel resistance and agronomic traits, although the colocalizationof significant regions between traits was very low. This indicates that it is possible the concurrentimprovement of resistance and agronomic traits.Conclusions: We developed a mapping population which allowed a finer dissection of the genetics of maizeresistance to corn borers and a solid nomination of candidate genes based on functional information. Thepopulation, given its large variability, was also adequate to map multiple traits and study the relationship betweenthem.Keywords: Maize, Mediterranean corn borer, Sesamia nonagrioides, Resistance, Mapping with multi-parentadvanced generation InterCrosses (MAGIC) populations, Quantitative trait loci (QTL), Genome wide associationanalysis (GWAS)
PB BMC Plant Biology
SN 14712229
YR 2019
FD 2019-10-17
LK http://hdl.handle.net/11093/4167
UL http://hdl.handle.net/11093/4167
LA eng
NO BMC Plant Biology, 19(1): 431 (2019)
NO Xunta de Galicia | Ref. IN607A/013
DS Investigo
RD 09-dic-2024