scholarly journals CROWN RUST ON PERENNIAL RYEGRASS IN FIELD TRIALS

1989 ◽  
pp. 253-254
Author(s):  
H.S. Easton ◽  
B.M. Cooper ◽  
T.J. Frasers ◽  
K.H. Widdup
Keyword(s):  
Perennial Ryegrass ◽  
Field Trials ◽  
Crown Rust ◽  
Puccinia Coronata ◽  
Rust Infection

Crown rust infection of 11 perennial ryegrass cultivars vaned significantly and consistently over 6 sites. 'Grasslands Ariki,' the new cultivar 'Yatsyn' and Grasslands selections G26 and G33 were less infected than 'Grasslands Nui', 'Ellett' or 'Grasslands Ruanui'. 'Droughtmaster' and 'Marathon' proved more susceptible than most. Keywords: Crown rust, Puccinia coronata. perenmal ryegrass

Reactions of eastern Canada oat genotypes to Puccinia coronata f. sp. avenae

2020 ◽  
Vol 100 (2) ◽  
pp. 209-217
Author(s):  
Allen G. Xue ◽  
Jim Menzies ◽  
Yuanhong Chen ◽  
Weikai Yan ◽  
Bao-luo Ma ◽  
...  
Keyword(s):  
Natural Populations ◽  
Field Trials ◽  
Crown Rust ◽  
Puccinia Coronata ◽  
Adult Plant ◽  
Limiting Factor ◽  
Sources Of Resistance ◽  
Eastern Canada ◽  
Breeding Programs ◽  
Breeding Lines

Crown rust, caused by Puccinia coronata f. sp. avenae (Pca), is the most important disease and yield limiting factor of oat production in eastern Canada. In this study 101 oat genotypes composed of 51 cultivars and 50 breeding lines from eight oat breeding programs across Canada were evaluated for seedling reactions to six common Pca races, as well as reactions to a bulk inoculum of Pca in greenhouse trials and for adult plant resistance (APR) to natural populations of Pca in field trials in 2014 and 2015. Sixty-six genotypes showed resistant reactions to at least one of the six races; of these, 22 were resistant to all six races. These 22 genotypes also showed resistance to the bulk inoculum at the seeding stage and to the natural populations of Pca at the adult plant stage, suggesting that these current and future oat varieties have effective resistance against the common races and Pca populations in the region. Eleven genotypes, including 12ANS03, AAC Bullet, CFA1213, CFA1306, Idaho, OA1301-1w-3, OA1369-5, OA1370-2, OA1371-2, OA1383-2, and Oscar, were susceptible as seedlings but resistant as adult plants. APR is proven to be long lasting and provides broad-spectrum resistance to Pca populations. The 11 oat genotypes identified with APR in the present study are more desirable as sources of resistance for breeding programs developing durable crown rust resistant cultivars for eastern Canada.

scholarly journals Four QTLs determine crown rust (Puccinia coronata f. sp. lolii) resistance in a perennial ryegrass (Lolium perenne) population

Heredity ◽  
2005 ◽  
Vol 95 (5) ◽  
pp. 348-357 ◽  
Author(s):  
H Muylle ◽  
J Baert ◽  
E Van Bockstaele ◽  
J Pertijs ◽  
I Roldán-Ruiz
Keyword(s):  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Crown Rust ◽  
Puccinia Coronata

scholarly journals Forage potential of wild populations of perennial ryegrass collected from southern New Zealand farms

1992 ◽  
pp. 161-165 ◽  
Author(s):  
K.H. Widdup ◽  
D.L. Ryan
Keyword(s):  
New Zealand ◽  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Principal Component ◽  
Crown Rust ◽  
Low Fertility ◽  
Cool Season ◽  
Rust Infection ◽  
Plant Evaluation

A ryegrass breeding programme to improve the cool season activity and summer quality of perennial ryegrass (Lolium perenne L,) in southern regions was initiated in 1986. One of the strategies assessed wild ryegrass populations from 50 dairy and sheep farms in Southland, West Otago and Westland. The plants were collected and evaluated as spaced plants in a high and low fertility site at DSIR Grasslands Gore in comparison with current ryegrass cultivars. Principal Component Analysis was used to order the performance of the ryegrass populations in relation to the observed characters of seasonal growth, tillering, crown rust infection, recurrent ear emergence and endophyte presence. Ihe collection consisted of many short-leaved densely tillered prostrate plants with high levels of crown rust infection and recurrent flowering. In comparison the cultivars had fewer, but larger tillers, rapid leaf extension and good rust tolerance. There were no strong distinguishing features between plants from dairy and sheep farms and 30% of plants had no endophyte. Selected ecotypes hybridised with New Zealand and European cultivars produced plants with better cool season growth and summer quality than standard cultivars. The ecotype germplasm is an important source in the development of new cultivars suited to the southern region. Keywords plant evaluation, Lolium perenne, ryegrass hybrids, southern New Zealand ecotypes

Evaluation of resistance to five isolates of Puccinia coronata f. sp. lolii in 19 perennial ryegrass cultivars

1997 ◽  
Vol 48 (2) ◽  
pp. 191 ◽  
Author(s):  
R. G. Clarke ◽  
O. N. Villalta ◽  
G. Hepworth
Keyword(s):  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Rust Resistance ◽  
South Australia ◽  
Crown Rust ◽  
Puccinia Coronata ◽  
Breeding Lines ◽  
The Many ◽  
Test Plants ◽  
Differential Test

This paper seeks to provide information on the differences in resistance to Puccinia coronata f. sp. lolii of the many perennial ryegrass (Lolium perenne) cultivars available in Australia, and on the variation in resistance to this pathogen within these cultivars. This information will help farmers to select crown rust resistant cultivars suited to their area, and indicate to perennial ryegrass breeders the diversity of crown rust resistance within the cultivars and lines screened. Twenty genotypes of 14 cultivars and 5 advanced breeding lines of perennial ryegrass were screened for their reaction to 5 isolates of P. coronata f. sp. lolii. The isolates were collected from South Australia, southern Queensland, and 3 separate regions of Victoria. Tasdale, Victorian, Martlet, Tasmanian No. 1, and D1 were significantly (P < 0�05) more susceptible to crown rust than all other cultivars and lines. Embassy, D4, and D16 were the most resistant of the 19 cultivars and lines screened. Within all cultivars and lines there was significant (P P. coronata f. sp. lolii . This type of screening for genotype reaction could enable differential test plants to be selected for determining the presence of P. coronata f. sp. lolii pathotypes, an area that requires further research.

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