Theoretical and Applied Genetics

, Volume 117, Issue 4, pp 531–543 | Cite as

Comparative analysis of multiple disease resistance in ryegrass and cereal crops

  • Young-Ki Jo
  • Reed Barker
  • William Pfender
  • Scott Warnke
  • Sung-Chur Sim
  • Geunhwa Jung
Original Paper


Ryegrass (Lolium spp.) is among the most important forage crops in Europe and Australia and is also a popular turfgrass in North America. Previous genetic analysis based on a three-generation interspecific (L. perenne × L. multiflorum) ryegrass population identified four quantitative trait loci (QTLs) for resistance to gray leaf spot (Magneporthe grisea) and four QTLs for resistance to crown rust (Puccinia coronata). The current analysis based on the same mapping population detected seven QTLs for resistance to leaf spot (Bipolaris sorokiniana) and one QTL for resistance to stem rust (Puccinia graminis) in ryegrass for the first time. Three QTLs for leaf spot resistance on linkage groups (LGs) 2 and 4 were in regions of conserved synteny to the positions of resistance to net blotch (Drechslera teres) in barley (Hordeum vulgare). One ryegrass genomic region spanning 19 cM on LG 4, which contained three QTLs for resistance to leaf spot, gray leaf spot, and stem rust, had a syntenic relationship with a segment of rice chromosome 3, which contained QTLs for resistance to multiple diseases. However, at the genome-wide comparison based on 72 common RFLP markers between ryegrass and cereals, coincidence of QTLs for disease resistance to similar fungal pathogens was not statistically significant.

Supplementary material

122_2008_797_MOESM1_ESM.doc (33 kb)
Mean disease severity of the ryegrass mapping population, its parents (MFA and MFB) and grandparents (Manhattan and Floregon) by stem rust (Puccinia coronata) and leaf spot (Bipolaris sorokiniana) (DOC 33 kb)
122_2008_797_MOESM2_ESM.doc (152 kb)
Occurrence of loci for disease resistance to gray leaf spot (GLS, Magnaporthe grisea), leaf spot (LS, Bipolaris sorokiniana), crown rust (CR, Puccinia coronata), stem rust (SR, Puccinia graminis), rice blast (RB, Magnaporthe grisea) and net blotch (NE, Drechslera teres) in ryegrass and cereals based on 72 RFLP markers (DOC 152 kb)
122_2008_797_MOESM3_ESM.doc (26 kb)
Mean air temperature and precipitation at the O.J. Noer Turfgrass Research and Education Facility in Verona, Wisconsin in 2004 and 2005 (DOC 26 kb)


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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Young-Ki Jo
    • 1
  • Reed Barker
    • 2
  • William Pfender
    • 2
  • Scott Warnke
    • 3
  • Sung-Chur Sim
    • 4
  • Geunhwa Jung
    • 5
  1. 1.Department of Plant Pathology and MicrobiologyTexas A&M UniversityCollege StationUSA
  2. 2.USDA-ARS, Oregon State UniversityCorvallisUSA
  3. 3.USDA-ARS, Floral and Nursery Plants Research UnitBeltsvilleUSA
  4. 4.Department of Horticulture and Crop ScienceOhio State UniversityWoosterUSA
  5. 5.Department of Plant, Soil, and Insect SciencesUniversity of MassachusettsAmherstUSA

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