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Genomic analysis of resistance to fall armyworm (Spodoptera frugiperda) in CIMMYT maize lines

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Title Genomic analysis of resistance to fall armyworm (Spodoptera frugiperda) in CIMMYT maize lines
 
Creator Kamweru, Isaac
Anani, Bruce Y.
Beyene, Yoseph
Makumbi, Dan
Adetimirin, Victor O.
Boddupalli, P.M.
Gowda, Manje
 
Subject maize
fall armyworms
genomics
genetic resistance
single nucleotide polymorphism
 
Description The recent invasion, rapid spread, and widescale destruction of the maize crop by the fall armyworm (FAW; Spodoptera frugiperda (J.E. Smith)) is likely to worsen the food insecurity situation in Africa. In the present study, a set of 424 maize lines were screened for their responses to FAW under artificial infestation to dissect the genetic basis of resistance. All lines were evaluated for two seasons under screen houses and genotyped with the DArTseq platform. Foliar damage was rated on a scale of 1 (highly resistant) to 9 (highly susceptible) and scored at 7, 14, and 21 days after artificial infestation. Analyses of variance revealed significant genotypic and genotype by environment interaction variances for all traits. Heritability estimates for leaf damage scores were moderately high and ranged from 0.38 to 0.58. Grain yield was negatively correlated with a high magnitude to foliar damage scores, ear rot, and ear damage traits. The genome-wide association study (GWAS) revealed 56 significant marker–trait associations and the predicted functions of the putative candidate genes varied from a defense response to several genes of unknown function. Overall, the study revealed that native genetic resistance to FAW is quantitative in nature and is controlled by many loci with minor effects.
 
Date 2022-01-28
2022-12-28T08:56:40Z
2022-12-28T08:56:40Z
 
Type Journal Article
 
Identifier Kamweru, I., Anani, B.Y., Beyene, Y., Makumbi, D., Adetimirin, V.O., Prasanna, B.M. and Gowda, M. 2022. Genomic analysis of resistance to fall armyworm (Spodoptera frugiperda) in CIMMYT maize lines. Genes 13(2):251. https://hdl.handle.net/10883/21961
2073-4425
https://hdl.handle.net/10568/126353
https://hdl.handle.net/10883/21961
https://doi.org/10.3390/genes13020251
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format application/pdf
 
Publisher MDPI AG
 
Source Genes