Files and links (1)
CC BY-NC V4.0, Open Access
Journal article
Exploiting barley landraces to reintroduce lost genetic diversity: Resistance to net form net blotch
Crop science, Vol.65(3), e70088
2025
Abstract
Centuries of barley (Hordeum vulgare) domestication and selection has resulted in reduced genetic diversity in modern cultivars, limiting breeder's options to select desirable traits. Barley landraces, heirloom varieties, and wild relatives are substantially more variable and can be exploited to reintroduce favorable genes and alleles. Five doubled haploid populations were phenotyped for net form net blotch (NFNB) disease, caused by the pathogen Pyrenophora teres f. teres, at three growth stages. Major, moderate, and minor effect quantitative trait loci (QTLs) associated with NFNB resistance were detected on six of the seven barley chromosomes, with percentage of explained variance (PEV) ranging from less than 10% to over 70%. Previously established major (PEV > 50%) and moderate (PEV 10%–40%) effect QTLs on 3H and 6H were detected against the Australian isolate used, as well as moderate and minor QTLs (PEV < 10%) distributed on 2H, 3H, 4H, and 5H. Differences in effect sizes of individual QTL were apparent between growth stages, tapering up toward heading or down from seedlings, together with growth stage-specific and synergistic QTL. Several of these QTL represent novel sources of resistance that may be combined for durable NFNB resistance.
Details
- Title
- Exploiting barley landraces to reintroduce lost genetic diversity: Resistance to net form net blotch
- Authors/Creators
- Nola K. D'Souza - Curtin UniversityHoan Dinh - Curtin UniversityJulie A. Lawrence - Curtin UniversityElzette Palmiero - Curtin UniversityMariano J. Muria-Gonzalez - Curtin UniversitySanjiv Gupta - Western Barley Genetics Alliance, College of Agricultural Sciences Murdoch University Murdoch Western Australia Australia, Department of Primary Industries and Regional Development South Perth Western Australia AustraliaKerrie Forrest - Agriculture VictoriaSimon R. Ellwood - Curtin University
- Publication Details
- Crop science, Vol.65(3), e70088
- Publisher
- Wiley Periodicals LLC on behalf of Crop Science Society of America.
- Identifiers
- 991005783133607891
- Copyright
- © 2025 The Author(s).
- Murdoch Affiliation
- School of Agricultural Sciences; Western Barley Genetics Alliance
- Language
- English
- Resource Type
- Journal article
Metrics
64 File views/ downloads
19 Record Views