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Delineating a locus conferring Fusarium crown rot resistance on chromosome arm 1HL in barley by developing and analysing a large population derived from near isogenic lines

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Gao, S, Zheng, Z, Hu, H, Jiang, Y, Liu, M, Stiller, J, Zhou, M ORCID: 0000-0003-3009-7854 and Liu, C 2020 , 'Delineating a locus conferring Fusarium crown rot resistance on chromosome arm 1HL in barley by developing and analysing a large population derived from near isogenic lines' , Crop Journal, vol. 8, no. 6 , pp. 1002-1010 , doi: 10.1016/j.cj.2020.03.008.

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Abstract

Fusarium crown rot (FCR), a chronic and severe disease caused by various Fusarium species, is prevalent in semi-arid cropping regions worldwide. One of the major QTL conferring FCR resistance was detected on chromosome arm 1HL (Qcrs.cpi-1H) in barley. To develop markers that can be reliably used to incorporate the resistance locus into breeding programs, we developed and assessed a near-isogenic line-derived population consisting of 1180 recombinant inbred lines targeting the locus. Using this population, we delineated Qcrs.cpi-1H into an interval of 0.4 cM covering a physical length of about 487 kb. Six markers co-segregating with this locus were generated. Co-linearity for genes located in this interval between the genome of barley and those of either rice or Brachypodium distachyon is poor. Three genes with non-synonymous variations between the resistant and susceptible lines were identified within the interval. The results reported in this study not only provide markers for integrating Qcrs.cpi-1H into breeding programs, but also form a solid foundation for cloning the causal gene(s) underlying this locus.

Item Type: Article
Authors/Creators:Gao, S and Zheng, Z and Hu, H and Jiang, Y and Liu, M and Stiller, J and Zhou, M and Liu, C
Keywords: Fusarium crown rot, barley, fine mapping, NIL-derived population, QTL, co-segregated marker, barley crown rot resistance
Journal or Publication Title: Crop Journal
Publisher: Elsevier Science Bv
ISSN: 2095-5421
DOI / ID Number: 10.1016/j.cj.2020.03.008
Copyright Information:

© 2020 Crop Science Society of China and Institute of Crop Science, CAAS. Production andAttribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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