Sammanfattning

Wheat blast (WB) is a destructive disease in South America and its first outbreak in Bangladesh in 2016 posed a great risk to food security of South Asian countries. A genome wide association study (GWAS) was conducted on a diverse panel of 184 wheat genotypes from South Asia and CIMMYT. Phenotyping was conducted in eight field experiments in Bolivia and Bangladesh and a greenhouse experiment in the United States. Genotypic data included 11,401 SNP markers of the Illumina Infinium 15K BeadChip and four additional STS markers on the 2NS/2AS translocation region. Accessions with stable WB resistance across experiments were identified, which were all 2NS carriers. Nevertheless, a dozen moderately resistant 2AS lines were identified, exhibiting big variation among experiments. Significant marker-trait associations (MTA) were detected on chromosomes 1BS, 2AS, 6BS, and 7BL; but only MTAs on 2AS at the 2NS/2AS translocation region were consistently significant across experiments. The resistant accessions identified in this study could be used in production in South Asian countries as a preemptive strategy to prevent WB outbreak.

Nyckelord

GWAS; resistance screening; Magnaporthe oryzae; Pyricularia oryzae; MoT

Publicerad i

Frontiers in Genetics
2021, Volym: 12, artikelnummer: 679162
Utgivare: FRONTIERS MEDIA SA

SLU författare

• Chawade, Aakash

  • Institutionen för växtförädling, Sveriges lantbruksuniversitet
    

Globala målen

SDG2 Avskaffa hunger, uppnå tryggad livsmedelsförsörjning och förbättrad nutrition samt främja ett hållbart jordbruk


UKÄ forskningsämne

Genetik och förädling


Publikationens identifierare

DOI: https://doi.org/10.3389/fgene.2021.679162

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/112234