Skip to main content

ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Crop and Product Physiology
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1393796
This article is part of the Research Topic Physiology and Breeding of Cereals View all 10 articles

Development and characterisation of novel durum wheat-H. chilense 4H ch chromosome lines as a source for resistance to Septoria tritici blotch

Provisionally accepted
Zuny Cifuentes Zuny Cifuentes 1maria-carmen CALDERON maria-carmen CALDERON 1Cristina Miguel-Rojas Cristina Miguel-Rojas 2Josefina C. Sillero Josefina C. Sillero 2Pilar Prieto Pilar Prieto 3*
  • 1 Institute for Sustainable Agriculture, Spanish National Research Council (CSIC), Córdoba, Spain
  • 2 IFAPA Centro Alameda del Obispo, Córdoba, Spain
  • 3 Plant Breeding, Institute for Sustainable Agriculture, Spanish National Research Council (CSIC), Córdoba, Spain

The final, formatted version of the article will be published soon.

    The use of wild species as a source of genetic variability is a valued tool in the framework of crop breeding. Hordeum chilense Roem. et Schult is a wild barley species that can be a useful genetic donor for sustainable wheat breeding which carries genes conferring resistance to some diseases or increasing grain quality, among others. Septoria tritici blotch (STB), caused by the Zymoseptoria tritici fungus, is one of the most important wheat diseases worldwide, affecting both bread and durum wheat, and having a high economic impact. Resistance to STB has been previously described in H. chilense chromosome 4H ch . In this study, we have developed introgression lines for H. chilense chromosome 4H ch in durum wheat using interspecific crosses, advanced backcrosses and consecutive selfing strategies. Alien H. chilense chromosome segments have been reduced in size by genetic crosses between H. chilense disomic substitution lines in durum wheat and durum wheat lines carrying the Ph1 deletion. Hordeum chilense genetic introgressions were identified in the wheat background through several plant generations by fluorescence in situ hybridisation (FISH) and simple sequence repeat (SSR) markers.An STB infection analysis has been also developed to assess STB resistance to a specific H. chilense chromosome region. The development of these H. chilense introgression lines with moderate to high resistance to STB represents an important advance in the framework of durum breeding and can be a valuable tool for plant breeders.

    Keywords: Septoria leaf blotch, plant breeding, Ph1 locus, Foliar disease, Chromosome manipulation

    Received: 29 Feb 2024; Accepted: 29 Jun 2024.

    Copyright: © 2024 Cifuentes, CALDERON, Miguel-Rojas, Sillero and Prieto. 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) or licensor 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: Pilar Prieto, Plant Breeding, Institute for Sustainable Agriculture, Spanish National Research Council (CSIC), Córdoba, Spain

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.