SSR-based genetic linkage analysis of resistance to crown rust (Puccinia coronata f. sp. lolii) in perennial ryegrass (Lolium perenne)

NoteInduction of Avenanthramides in Oat Leayes Inoculated with Crown Rust Fungus , Puccinia coronata f . sp . avenae

significant role in the rejection of the pathogen,i'2) Avenalumins consist of 3 components; the chemical structure ef the major component, avenalumin t, has been established to be 2-[2-(4hydroxyphenyl)ethenyl]-6-4H-3,1-benzoxazin-4-onc (1), based on an MS analysis of its acetylated derivative and identification of the methanolysis products.3) However, chem{cal studies by Crombie and Mistry4) ha...

Demonstration of pathotype specificity in stem rust of perennial ryegrass.

Rust diseases cause significant damage in forage and seed crops of perennial ryegrass (Lolium perenne), which is highly heterozygous and heterogeneous and thus presents difficulty in genetic analysis. There has been no definitive demonstration of the existence of pathotypes for stem rust or other rusts of perennial ryegrass, although experiments with crown rust (Puccinia coronata) of this host ...

ACREMONIUM-ENDOPHYTES OF PERENNIAL RYEGRASS (Lolium perenne) IN FRANCE

13-17 ABSTRACT Infection with endophytic fungi (Acremonium spp.) was detected in seeds of wild populations of perennial ryegrass (Lolium perenne) collected in France by private breeding companies and INRA. In total, 262 populations were examined and 70% contained Acremonium. It is worth noticing that most populations are endophyte infected but generally endophyte infection rates per population ...

Crown Rust Development and Selection for Virulence in Puccinia coronata f. sp. avenae in an Oat Multiline Cultivar

Oat crown rust, caused by Puccinia coronata f. sp. avenae, is considered to be the most serious disease of oat (Avena sativa L.) in North America (27). It is distributed worldwide but is most damaging where heavy nightly dews occur in conjunction with moderate to high temperatures during the growing season. Under ideal conditions, crown rust can result in complete crop failure. In the United St...

The effects of maleic hydrazide on growth control of perennial ryegrass (lolium perenne L.CV. yarandi)