Mapping quantitative trait loci for resistance to Pratylenchus thornei from synthetic hexaploid wheat in the International Triticeae Mapping Initiative (ITMI) population
Article
Article Title | Mapping quantitative trait loci for resistance to Pratylenchus thornei from synthetic hexaploid wheat in the International Triticeae Mapping Initiative (ITMI) population |
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ERA Journal ID | 5177 |
Article Category | Article |
Authors | Zwart, R. S., Thompson, J. P., Sheedy, J. G. and Nelson, J. |
Journal Title | Australian Journal of Agricultural Research |
Journal Citation | 57 (5), pp. 525-530 |
Number of Pages | 6 |
Year | 2006 |
Publisher | CSIRO Publishing |
Place of Publication | Australia |
ISSN | 0004-9409 |
1444-9838 | |
Digital Object Identifier (DOI) | https://doi.org/10.1071/AR05177 |
Web Address (URL) | https://www.publish.csiro.au/cp/ar05177 |
Abstract | Root-lesion nematode (Pratylenchus thornei) is a serious pathogen of wheat in many countries. The International Triticeae Mapping Initiative (ITMI) population of recombinant inbred lines (RILs) was assessed for resistance to P. thornei to determine the chromosome locations of the resistance genes. The ITMI population is derived from a cross between the resistant synthetic hexaploid wheat W-7984 and a susceptible bread wheat cultivar Opata 85. Two years of phenotypic data for resistance to P. thornei were obtained in replicated glasshouse trials. Quantitative trait locus (QTL) analysis was performed using available segregation and map data for 114 RILs. A QTL on chromosome 6DS showed consistent effects for reduced nematode numbers (partial resistance) across years and accounted for 11% and 23% of the phenotypic variation. A second QTL for P. thornei resistance on chromosome 2BS accounted for an additional 19% and 5%. Restriction fragment length polymorphism (RFLP) and simple sequence repeat (SSR) markers associated with the QTLs are physically located in regions rich in major genes at the distal ends of the short chromosome arms of 6D and 2B. SSR markers with potential for marker-assisted selection of P. thornei resistance effective in different genetic backgrounds have been identified. |
Keywords | root-lesion nematodes; bread wheat; molecular markers; MAS; composite interval mapping |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 300409. Crop and pasture protection (incl. pests, diseases and weeds) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Department of Primary Industries and Fisheries, Queensland |
Centre for Crop Health (Operations) | |
Kansas State University, United States |
https://research.usq.edu.au/item/w3w08/mapping-quantitative-trait-loci-for-resistance-to-pratylenchus-thornei-from-synthetic-hexaploid-wheat-in-the-international-triticeae-mapping-initiative-itmi-population
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