Comparison of the yield, nitrogen and phosphorus content, and rust infection (Puccinia coronata) of irrigated ryegrass swards in south-eastern Queensland

Lowe, KF; Bowdler, TM; Ostrowski, H.; Stillman, SL

doi:10.1071/ea9830294

Cited by 13 publications

(7 citation statements)

References 2 publications

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“…In a similar vein, there is a case for complementary use of early-and late-flowering cultivars of a grass in well-planned systems where contrasting growth patterns can be exploited, either in separate sowings (Neal-Smith & Wright 1969;Reed et al 1980;Rodgers & Bailey 1981;Lowe et al 1983), or in blends, in order to maintain highquality pasture over time.…”

Section: Complementary Use Of Grass Speciesmentioning

confidence: 99%

Improving the adaptation of perennial ryegrass, tall fescue, phalaris, and cocksfoot for Australia

Reed

1996

New Zealand Journal of Agricultural Research

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The main perennial pasture grasses sown in Australia are perennial ryegrass (Lolium perenne L.), phalaris {Phalaris aquatica L), tall fescue (Festuca arundinacea L.), and cocksfoot (Dactylis glomerata L.). The area of adaptation, and the longevity and yield of these species are likely to improve considerably over the next decade as a result of the activities within the Australian Grass Improvement Program. Recent use of summer-dormant cultivars of phalaris has proved successful and novel summer-dormant cultivars of perennial ryegrass and tall fescue will soon be released to commerce. Of these four naturalised species, all but tall fescue have been commonly sown by farmers in Australia for 60-130 years. However, only phalaris has been subjected to detailed and sustained research. Breeders have provided a range of phalaris cultivars for early to late-season environments with improved seedling vigour, winter growth, and reduced anti-quality factors. They have also addressed edaphic limitations. Programmes are now in place to improve the other species. This review outlines the aspects of that work directed at improved adaptation to the Australian environment. A limited range of genetic resources has entered evaluation-for all four species. For perennial ryegrass, the collection of local ecotypes is well advanced. Breeding is in progress for all except cocksfoot, and is coordinated within national programmes characterised by A96003 Received 15 January 1996; accepted 25 June 1996 nationwide progeny tests, and strategic support research. Significant efforts are being takenparticularly with perennial ryegrass-to strengthen new cultivars via selection for resistance to common pathogens. Progress in the development of biotechnological procedures is expected to facilitate further improvements to the adaptation of perennial grasses to adverse climates.

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Section: Complementary Use Of Grass Speciesmentioning

confidence: 99%

Improving the adaptation of perennial ryegrass, tall fescue, phalaris, and cocksfoot for Australia

Reed

1996

New Zealand Journal of Agricultural Research

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“…Because most of the vegetative growth was completed before crown rust epidemics occurred, no relationship between crown rust resistance and total forage production was found. Lowe et al (1983) determined that the crown rust severity of three ryegrass (Lolium spp.) mixtures was intermediate to the severities of the component lines.…”

Section: Resultsmentioning

confidence: 99%

Stability of forage yield and quality in pearl millet hybrids heterogenous for rust resistance

1993

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The susceptible pearl millet hybrid 'Tifleaf 1', the resistant hybrid 'Tifleaf 2', and two experimental 3-way hybrids with different proportions of resistant and susceptible plants were evaluated for rust resistance and forage yield and quality in 1990, 1991, and 1992. Different environmental conditions were obtained by varying planting date, planting density, and fungicide applications across three years of evaluation in the field. Rust severity of forage was negatively correlated with late season green yield, dry matter yield, in vitro dry matter digestibility, and digestible dry matter yield. The stability across environments of the 3-way hybrids was intermediate between resistant 'Tifleaf 2' and susceptible 'Tifleaf 1' for rust severity and the yield and quality measurements negatively correlated with rust severity. Mixtures of resistant and susceptible plants would probably provide greater control of rust than measured in these small-plot experiments. Although a mixture of resistant and susceptible plants appears to provide an alternative to monogenic control of rust in forage pearl millets, identification and utilization of additional sources of resistance would be beneficial to improve the performance of 3-way hybrids.

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“…Italian ryegrass (cv. Grasslands Tama), hereafter referred to as ryegrass, was used as a model system because of its high susceptibility to crown rust (Lowe et al. , 1983).…”

Section: Methodsmentioning

confidence: 99%

Crown rust affects plant performance and interference ability of Italian ryegrass in the post‐epidemic generation

Mattner

Parbery

2007

Grass and Forage Science

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This study investigated the effects of crown rust (caused by Puccinia coronata f.sp. lolii) in Italian ryegrass (Lolium multiflorum) on plant growth and interference ability in the post-epidemic generation. Rust-infected Italian ryegrass plants produced seeds with lower weights than healthy plants (on average proportionately 0AE36 lower). Furthermore, the early seedling vigour of plants from rust-infected parents was reduced by 0AE50 compared with seed from healthy parents. Under disease-free conditions in the post-epidemic generation, mature plants from rust-infected parents produced 0AE13 less shoot dry weight, 0AE15 fewer tillers, 0AE11 fewer leaves and 0AE25 less leaf area than plants from healthy parents. As such, the effects of crown rust in Italian ryegrass persisted for at least one post-epidemic generation. Under rust-infected conditions in the post-epidemic generation, however, the difference in performance between plants from healthy and rust-infected parents was minimal. This suggests that any advantage plants gain from having healthy parents, compared with rustinfected parents, might be lost when the post-epidemic generation is grown under conditions of rust infection. Irrespective of rust infection in the post-epidemic generation, the magnitude of intra-specific interference was greater in monocultures of Italian ryegrass from healthy parents than in those from rust-infected parents. However, the magnitude of inter-specific interference and the relative interference ability of plants of rust-infected and healthy parents did not differ. The implications of these results to plant ecology are discussed.

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Comparison of the yield, nitrogen and phosphorus content, and rust infection (Puccinia coronata) of irrigated ryegrass swards in south-eastern Queensland

Cited by 13 publications

References 2 publications

Improving the adaptation of perennial ryegrass, tall fescue, phalaris, and cocksfoot for Australia

Improving the adaptation of perennial ryegrass, tall fescue, phalaris, and cocksfoot for Australia

Stability of forage yield and quality in pearl millet hybrids heterogenous for rust resistance

Crown rust affects plant performance and interference ability of Italian ryegrass in the post‐epidemic generation

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