首页 | 本学科首页   官方微博 | 高级检索  
     


Genetic dissection of a major Fusarium head blight QTL in tetraploid wheat
Authors:Otto  C.D.  Kianian  S.F.  Elias  E.M.  Stack  R.W.  Joppa  L.R.
Affiliation:(1) Department of Plant Sciences, North Dakota State University, Fargo, ND 58105, USA;(2) Department of Plant Pathology, and 3Retired from North Dakota State University Fargo, ND 58105, USA;(3) Retired from North Dakota State University Fargo, ND 58105, USA;(4) Present address: Department of Agronomy and Plant Genetics, University of Minnesota, Hayes Hall, St. Paul, MN 55108, USA
Abstract:
The devastating effect of Fusarium head blight (FHB) caused by Fusarium graminearum has led to significant financial losses across the Upper Midwest of the USA. These losses have spurred the need for research in biological, chemical, and genetic control methods for this disease. To date, most of the research on FHB resistance has concentrated on hexaploid wheat (Triticum aestivum L.) lines originating from China. Other sources of resistance to FHB would be desirable. One other source of resistance for both hexaploid wheat and tetraploid durum wheat (T. turgidum L. var. durum) is the wild tetraploid, T. turgidum L. var. dicoccoides (T. dicoccoides). Previous analysis of the `Langdon'-T. dicoccoides chromosome substitution lines, LDN(Dic), indicated that the chromosome 3A substitution line expresses moderate levels of resistance to FHB. LDN(Dic-3A) recombinant inbred chromosome lines (RICL) were used to generate a linkage map of chromosome 3A with 19 molecular markers spanning a distance of 155.2 cM. The individual RICL and controls were screened for their FHB phenotype in two greenhouse seasons. Analysis of 83 RICL identified a single major quantitative trait locus, Qfhs.ndsu-3AS, that explains 37% of the phenotypic or 55% of the genetic variation for FHB resistance. A microsatellite locus, Xgwm2, is tightly linked to the highest point of the QTL peak. A region of the LDN (Dic-3A) chromosome associated with the QTL for FHB resistance encompasses a 29.3 cM region from Xmwg14 to Xbcd828.
Keywords:durum wheat  Fusarium head blight  QTL  recombinant inbred chromosome lines  Triticum dicoccoides
本文献已被 PubMed SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号