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. 2025 Jan 8;138(1):23.
doi: 10.1007/s00122-025-04818-x.

Identification of genetic loci and candidate genes underlying Fusarium crown rot resistance in wheat

Yuqing Su  1 , Xiangru Xu  1 , Yunqiao Wang  2 , Tongzhu Wang  3 , Jiazheng Yu  1 , Jiatian Yang  1 , Jinlong Li  1 , Yutian Gao  1 , Yixin Wang  1 , Wei Sang  1 , Cong Li  3 , Xingyi Wang  2 , Zhi Zheng  4 , Chaojie Xie  1 , Jian Ma  5 , Jun Ma  6
Affiliations

Identification of genetic loci and candidate genes underlying Fusarium crown rot resistance in wheat

Yuqing Su et al. Theor Appl Genet. .

Abstract

A major locus Qfcr.cau-1B conferring resistance to Fusarium crown rot was identified and validated. The putative gene underlying this locus was pinpointed via virus-induced gene silencing. Fusarium crown rot (FCR), caused by various Fusarium pathogens such as Fusarium pseudograminearum and F. culmorum, is a severe soil-borne disease which significantly affected wheat (Triticum aestivum) production in many arid and semi-arid cropping regions of the world. In this study, a total of 5 QTLs associated with FCR resistance were detected on chromosomes 1B, 2B, 3A, 5A, and 7D using a population of 120 F8 recombinant inbred lines (RIL) derived from a cross between two Chinese germplasm 20828 and SY95-71. A major locus Qfcr.cau-1B, which accounted for up to 28.33% of the phenotypic variation with a LOD value of 10.99, was consistently detected across all three trials conducted. The effect of Qfcr.cau-1B on FCR resistance was further validated using a F5 RIL population between 20828 and BLS2. Integrated transcriptome and sequence variation analysis showed that three genes including TraesCS1B02G017700, TraesCS1B02G016400, and TraesCS1B02G022300 were potential candidate genes for Qfcr.cau-1B. Of these three genes, the virus-induced silencing of TraesCS1B02G022300 significantly promoted FCR severity, indicating its positive role in FCR resistance. Taken together, results from this study expand our understanding on genetic basis of FCR resistance in wheat and will be indicative for cloning genes conferring FCR resistance.

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Conflict of interest statement

Declarations. Conflict of interest: The authors declare that they have no conflict of interest. Ethical approval: The experiments were performed in compliance with the current laws of China.

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