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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Plant Sci. | doi: 10.3389/fpls.2019.01206

A novel QTL conferring Fusarium crown rot resistance located on chromosome arm 6HL in barley

 Chunji Liu1*, Shang Gao1, 2, 3,  Zhi Zheng1, Haiyan Hu1, 4, Haoran Shi3,  Jian Ma3,  Yaxi Liu3,  Yuming Wei3,  You-Liang Zheng3 and Meixue Zhou2
  • 1Agriculture & Food, Commonwealth Scientific and Industrial Research Organisation, Brisbane, Australia
  • 2Tasmanian Institute of Agriculture, College of Sciences and Engineering, University of Tasmania, Australia
  • 3Triticeae Research Institute, Sichuan Agricultural University, China
  • 4College of Life Sciences and Technology, Henan Institute of Science and Technology, China

Fusarium crown rot (FCR), caused primarily by Fusarium pseudograminearum, is a devastating disease for cereal production in semi-arid regions worldwide. To identify and characterize loci conferring FCR resistance, we assessed a landrace AWCS799 which is among the best lines identified from a systematic screening of more than 1,000 genotypes. Genetic control of its resistance was investigated by generating and analysing two populations of recombinant inbred lines with AWCS799 as the common parent. One of the populations was used for QTL detection and the other for validation. A novel QTL, located on the long arm of chromosome 6H (designated as Qcrs.caf-6H), was consistently detected in each of the four FCR severity tests conducted against the mapping population. The QTL explained up to 28.3% of the phenotypic variance and its effect was confirmed in the validation population. Significant interaction between this resistance locus and either plant height or heading date was not detected, further facilitating its manipulation in breeding programs.

Keywords: Fusarium crown rot (FCR), Barley ( Hordeum vulgare L.), QTL, Breeding, RIL population

Received: 12 Jun 2019; Accepted: 02 Sep 2019.

Copyright: © 2019 Liu, Gao, Zheng, Hu, Shi, Ma, Liu, Wei, Zheng and Zhou. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Chunji Liu, Agriculture & Food, Commonwealth Scientific and Industrial Research Organisation, Brisbane, Brisbane, Australia, chunji.liu@csiro.au