Inheritance of Resistance to Fusarium Wilt of Flax in Dakota Selection 48–94<sup>1</sup>

Knowles, P. F.; Houston, B. R.

doi:10.2134/agronj1955.00021962004700030006x

Cited by 9 publications

(1 citation statement)

References 3 publications

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“…Recently numerous GWAS studies carried out in flax which interrogated traits related to yield, phenology and fatty acid content were reported [22][23][24][25][26][27][28][29]. In addition, flax omics data analytics broadened our knowledge of wilt resistance genes obtained with classical genetics approaches by adding data on QTL loci to a known gene set (~10 genes) conferring wilt resistance in flax [7,8,30]. Specifically, Spielmeyer et al [31,32] identified two QTLs explaining 38% and 26% of phenotypic variations, located within linkage groups 6 and 10.…”

Section: Introductionmentioning

confidence: 99%

Genomic Regions Associated with Fusarium Wilt Resistance in Flax

Kanapin

Bankin

Rozhmina

et al. 2021

IJMS

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Modern flax cultivars are susceptible to many diseases; arguably, the most economically damaging of these is the Fusarium wilt fungal disease. Over the past decades international flax breeding initiatives resulted in the development of resistant cultivars. However, much remains to be learned about the mechanisms of resistance to Fusarium infection in flax. As a first step to uncover the genetic factors associated with resistance to Fusarium wilt disease, we performed a genome-wide association study (GWAS) using 297 accessions from the collection of the Federal Research Centre of the Bast Fiber Crops, Torzhok, Russia. These genotypes were infected with a highly pathogenic Fusarium oxysporum f.sp. lini MI39 strain; the wilt symptoms were documented in the course of three successive years. Six different single-locus models implemented in GAPIT3 R package were applied to a selected subset of 72,526 SNPs. A total of 15 QTNs (Quantitative Trait Nucleotides) were detected during at least two years of observation, while eight QTNs were found during all three years of the experiment. Of these, ten QTNs occupied a region of 640 Kb at the start of chromosome 1, while the remaining QTNs mapped to chromosomes 8, 11 and 13. All stable QTNs demonstrate a statistically significant allelic effect across 3 years of the experiment. Importantly, several QTNs spanned regions that harbored genes involved in the pathogen recognition and plant immunity response, including the KIP1-like protein (Lus10025717) and NBS-LRR protein (Lus10025852). Our results provide novel insights into the genetic architecture of flax resistance to Fusarium wilt and pinpoint potential candidate genes for further in-depth studies.

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