Napier subterranean clover (Trifolium subterraneum L. var. yanninicum)

2006 ◽  
Vol 46 (8) ◽  
pp. 1109 ◽  
Author(s):  
P. G. H. Nichols ◽  
M. J. Barbetti ◽  
P. M. Evans ◽  
A. D. Craig ◽  
G. A. Sandral ◽  
...  
Keyword(s):  
South Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Improvement Program ◽  
Phytophthora Root Rot ◽  
Growing Season Length ◽  
Permanent Pasture ◽  
South Wales ◽  
Vigorous Growth ◽  
Water Holding

Napier is a late flowering F6-derived crossbred subterranean clover of var. yanninicum [(Katz. et Morley) Zohary and Heller] developed by the collaborating organisations of the National Annual Pasture Legume Improvement Program. It is a replacement for both Larisa and Meteora and has been selected for release on the basis of its greater herbage and seed production and disease resistance to both known races of clover scorch and 2 of the common races of Phytophthora root rot. Napier is recommended for sowing in Victoria, Western Australia, New South Wales, and South Australia. It is best suited to moderately acidic soils prone to water-logging and to loamy and clay soils with good water-holding capacity in areas with a minimum growing season length of 7.5 months, which extends into late November. Napier is well adapted to the permanent pasture systems found in the areas in which it will be grown. Its upright, vigorous growth makes it well suited to grazing by cattle or sheep and to fodder conservation. Napier has been granted Plant Breeders Rights in Australia.

Coolamon subterranean clover (Trifolium subterraneum L. var. subterraneum)

2007 ◽  
Vol 47 (2) ◽  
pp. 223 ◽  
Author(s):  
P. G. H. Nichols ◽  
M. J. Barbetti ◽  
G. A. Sandral ◽  
B. S. Dear ◽  
C. T. de Koning ◽  
...  
Keyword(s):  
New South ◽  
South Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Growing Season ◽  
Improvement Program ◽  
Permanent Pasture ◽  
South Wales ◽  
Clover Scorch ◽  
Pasture Legume

Coolamon is a mid-season to late-season flowering F4-derived crossbred subterranean clover of var. subterraneum, developed by the collaborating organisations of the National Annual Pasture Legume Improvement Program. It is a replacement for Junee and has been selected for release on the basis of its greater herbage production and persistence, and its resistance to both known races of clover scorch. Coolamon is recommended for sowing in Western Australia, New South Wales, Victoria, South Australia and Queensland. It is best suited to well-drained, moderately acidic soils in areas with a growing season of 6.5–8 months that extends into November. Coolamon is best suited to phase farming and permanent pasture systems. It can also be used in cropping rotations, but at least 2 years of pasture are required between crops. Coolamon has been granted Plant Breeders Rights in Australia.

Izmir subterranean clover (Trifolium subterraneum L. var. subterraneum)

2007 ◽  
Vol 47 (2) ◽  
pp. 226 ◽  
Author(s):  
P. G. H. Nichols ◽  
G. A. Sandral ◽  
B. S. Dear ◽  
C. T. de Koning ◽  
D. L. Lloyd ◽  
...  
Keyword(s):  
Seed Production ◽  
Seed Set ◽  
New South ◽  
South Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Good Seed ◽  
Improvement Program ◽  
South Wales ◽  
Pasture Legume

Izmir is a hardseeded, early flowering, subterranean clover of var. subterraneum (Katz. et Morley) Zohary and Heller collected from Turkey and developed by the collaborating organisations of the National Annual Pasture Legume Improvement Program. It is a more hardseeded replacement for Nungarin and best suited to well-drained, moderately acidic soils in areas with a growing season of less than 4.5 months. Izmir seed production and regeneration densities in 3-year pasture phases were similar to Nungarin in 21 trials across southern Australia, but markedly greater in years following a crop or no seed set. Over all measurements, Izmir produced 10% more winter herbage and 7% more spring herbage than Nungarin. Its greater hardseededness and good seed production, makes it better suited to cropping rotations than Nungarin. Softening of Izmir hard seeds occurs later in the summer–autumn period than Nungarin, giving it slightly greater protection from seed losses following false breaks to the season. Izmir is recommended for sowing in Western Australia, New South Wales, Victoria, South Australia and Queensland. Izmir has been granted Plant Breeders Rights in Australia.

scholarly journals Urana subterranean clover (Trifolium subterraneum L. var. subterraneum)

2006 ◽  
Vol 46 (8) ◽  
pp. 1105 ◽  
Author(s):  
P. G. H. Nichols ◽  
M. J. Barbetti ◽  
G. A. Sandral ◽  
B. S. Dear ◽  
C. T. de Koning ◽  
...  
Keyword(s):  
New South ◽  
South Australia ◽  
Field Performance ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Growing Season ◽  
Crop Rotations ◽  
Improvement Program ◽  
South Wales ◽  
Pasture Legume

Urana is a hardseeded, moderately early flowering F5-derived crossbred subterranean clover of var. subterraneum [(Katz. et Morley) Zohary and Heller] developed by the collaborating organisations of the National Annual Pasture Legume Improvement Program. It has been selected for release as a new cultivar on the basis of its high winter and spring herbage production and overall field performance relative to other subterranean clovers of similar maturity. Urana is recommended for sowing in Western Australia, New South Wales, Victoria, South Australia and Queensland. It is best suited to well-drained, moderately acidic soils in areas with a growing season of 5–7 months, which extends into mid-October. Urana is suited to phase farming and crop rotations. It has been granted Plant Breeders Rights in Australia.

Occurrence of Phytophthora clandestina in Trifolium subterraneum paddocks in Australia

2001 ◽  
Vol 41 (2) ◽  
pp. 187 ◽  
Author(s):  
R. Aldaoud ◽  
W. Guppy ◽  
L. Callinan ◽  
S. F. Flett ◽  
K. A. Wratten ◽  
...  
Keyword(s):  
Western Australia ◽  
Root Rot ◽  
New South ◽  
New South Wales ◽  
South Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Soil Samples ◽  
South Wales ◽  
Differential Cultivars

In 1995–96, a survey of soil samples from subterranean clover (Trifolium subterraneum L.) paddocks was conducted across Victoria, South Australia, New South Wales and Western Australia, to determine the distribution and the prevalence of races of Phytophthora clandestina (as determined by the development of root rot on differential cultivars), and the association of its occurrence with paddock variables. In all states, there was a weak but significant association between P. clandestina detected in soil samples and subsequent root rot susceptibility of differential cultivars grown in these soil samples. Phytophthora clandestina was found in 38% of the sampled sites, with a significantly lower prevalence in South Australia (27%). There were significant positive associations between P. clandestina detection and increased soil salinity (Western Australia), early growth stages of subterranean clover (Victoria), mature subterranean clover (South Australia), recently sown subterranean clover (South Australia), paddocks with higher subterranean clover content (Victoria), where herbicides were not applied (South Australia), irrigation (New South Wales and Victoria), cattle grazing (South Australia and Victoria), early sampling dates (Victoria and New South Wales), sampling shortly after the autumn break or first irrigation (Victoria), shorter soil storage time (Victoria) and farmer’s perception of root rot being present (Victoria and New South Wales). Only 29% of P. clandestina isolates could be classified under the 5 known races. Some of the unknown races were virulent on cv. Seaton Park LF (most resistant) and others were avirulent on cv. Woogenellup (most susceptible). Race 1 was significantly less prevalent in South Australia than Victoria and race 0 was significantly less prevalent in New South Wales than in South Australia and Western Australia. This study revealed extremely wide variation in the virulence of P. clandestina. The potential importance of the results on programs to breed for resistance to root rot are discussed. in South Australia.

Growth and persistence of Mediterranean genotypes of midseason-late maturing subterranean clover (Trifolium subterraneum) in Victoria

1987 ◽  
Vol 27 (4) ◽  
pp. 551 ◽  
Author(s):  
SG Clark ◽  
JR Hirth
Keyword(s):  
New South ◽  
South Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Seed Banks ◽  
South Wales ◽  
Commercial Cultivars ◽  
Autumn And Winter ◽  
The Mediterranean Basin ◽  
Research Institute

Forty-two midseason-late maturing subterranean clover genotypes from the Mediterranean basin, 12 commercial cultivars, 2 bulk treatments and a blank control were sown in small plots in 1983 at the Pastoral Research Institute, Hamilton, Vic. (10.5 m2), and at the Rutherglen Research Institute, Rutherglen, Vic. (7.0 m2), to assess seasonal yield and persistence over 3 years. Perennial ryegrass cv. Ellett was sown as a companion grass at Hamilton. At both sites, but particularly at Hamilton, several genotypes were identified which showed considerable improvement over commercial cultivars. Some genotypes, although late maturing, were as productive as the best commercial cultivars in autumn and winter (e.g 2.06-2.38 t DM/ha) and were also highly productive (e.g. 3.46-3.94 t DM/ha) in spring (e.g. CPI 89822 H, 89774 F [Sardinia], 68103 H [Portugal] and GF 073.2 [Corsica] at Hamilton and CPI 89880 F, 89855 G, 89880 J [Sardinia] and GF 144.3 [France] at Rutherglen). Seed production of some genotypes was superior to that of the commercial cultivars (P= 0.01). Trikkala, Larisa and Karridale were the cultivars with the largest seed banks at both sites at the end of the third year. Nine of the 13 genotypes measured had seed banks at least as large as Trikkala (36 1 kg/ha) at Hamilton (e.g. 89774 F, 431 kg/ha; 89777 C, 402 kg/ha). All 10 genotypes measured at Rutherglen had seed banks at least as large as Karridale (1298 kg/ha) (e.g. 89880 J, 1717 kg/ ha; and 89820 D, 1578 kg/ha). As a result of this work and similar studies in Western Australia, New South Wales, South Australia and Tasmania, 13 late-maturing genotypes have been chosen for advanced evaluation prior to cultivar release about 1990.

National survey of viruses in pastures of subterranean clover. III. Equipment for large scale screening of viruses by ELISA

1993 ◽  
Vol 44 (8) ◽  
pp. 1883 ◽  
Author(s):  
LB Hulse ◽  
K Helms ◽  
PM Waterhouse
Keyword(s):  
Immunosorbent Assay ◽  
Large Scale ◽  
New South ◽  
South Australia ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Nationwide Survey ◽  
Enzyme Linked Immunosorbent Assay ◽  
South Wales ◽  
Large Scale Screening

Equipment for large scale enzyme-linked immunosorbent assay (ELISA) was developed for a 3 year nationwide survey of the incidence of four viruses in pastures of Trifolium subterraneum (subterranean clover) in New South Wales, Victoria, South Australia, Western Australia and Tasmania. Instruments were designed to (a) automate quantitatively the addition of buffer to plant samples passing through a sap extractor, (b) standardize the washing of plates in the various stages of the ELISA protocol, and (c) replace hand pipetting with a pneumatic foot-operated pipette.

The in vitro inhibition of Phytophthora clandestina by some rhizobia and the possible role of Rhizobium trifolii in biological control of Phytophthora root rot of subterranean clover

1999 ◽  
Vol 50 (8) ◽  
pp. 1469 ◽  
Author(s):  
S. Simpfendorfer ◽  
T. J. Harden ◽  
G. M. Murray
Keyword(s):  
Biological Control ◽  
Root Rot ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Root Disease ◽  
Rhizobium Trifolii ◽  
Biological Control Agents ◽  
Control Activity ◽  
Phytophthora Root Rot

The interaction between 29 isolates of Rhizobium and the in vitro growth of 3 strains of Phytophthora clandestina was investigated to determine the potential of these bacteria as biological control agents against root rot of subterranean clover (Trifolium subterraneum L.). The biological control activity of Rhizobium on the severity of root disease in seedlings was also investigated under glasshouse conditions. Thirteen of the 29 Rhizobium isolates caused significant reductions in the hyphal growth of the 3 P. clandestina isolates examined. Inoculation of seedlings with Rhizobium trifolii reduced the severity of root disease by 14–58% with corresponding increases in dry matter production of 20–73%. These results indicate that Rhizobium species have potential as biological control agents against the root rot of T. subterraneum seedlings caused by P. clandestina.

Lucerne, phalaris, and wallaby grass in short-term pasture phases in two eastern Australian wheatbelt environments. 2. Effect of perennial density and species on subterranean clover populations and the relative success of 3 clover cultivars of different maturity

2007 ◽  
Vol 58 (2) ◽  
pp. 123 ◽  
Author(s):  
B. S. Dear ◽  
G. A. Sandral ◽  
J. M. Virgona ◽  
A. D. Swan ◽  
B. A. Orchard ◽  
...  
Keyword(s):  
Seed Yield ◽  
Seed Bank ◽  
Seedling Survival ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Climatic Conditions ◽  
Perennial Species ◽  
Growing Season Length ◽  
Herbage Yield ◽  
Clover Seed

The effect of the density of 3 perennial species, phalaris (Phalaris aquatica L.), wallaby grass (Austrodanthonia richardsonii Kunth), and lucerne (Medicago sativa L.), on seed set, regeneration, and the relative competitiveness of 3 cultivars of subterranean clover (Trifolium subterraneum L.) was examined in 2 environments in the south-eastern Australian wheatbelt. Seed yields of subterranean clover were inversely related to perennial density at both sites over the first 2 years, the relationship varying with perennial species. Phalaris depressed the seed yield of clover more than lucerne and wallaby grass in the second and third year at equivalent densities. Clover seed yield was positively related to clover herbage yield in late spring at both sites, and inversely related to perennial herbage yield. Clover seed yield displayed an increasing linear relationship with the proportion of light reaching the clover understorey in spring, which in turn was inversely related to perennial density and perennial herbage yield. Clover seedling regeneration in mixed swards in autumn was positively related to the size of the summer seed bank, but negatively related to perennial density. Clover seedling survival following a premature germination at Kamarah was inversely correlated to the density of phalaris and lucerne in the sward. The relative competitiveness of the 3 subterranean clover cultivars varied between sites, with climatic conditions (rainfall and growing-season length) having a greater effect on the relative cultivar performance than companion perennial species or density. The later maturing subterranean clover cv. Goulburn became the dominant cultivar at the wetter site, constituting 72% of the seed bank, but declined to only 3–8% of the seed bank at the drier site. The proportion of the early flowering cultivar Dalkeith in the seed bank increased over time at the drier site and was highest (53%) in plots with the highest perennial density. We concluded that although perennial pasture species will depress clover seed yield and subsequent regeneration, these effects could be minimised by reducing perennial densities and exploiting variations in competitiveness between perennial species as identified in this study. Sowing earlier maturing subterranean clover cultivars would only be an advantage in increasing clover content in low-rainfall environments. The findings suggest that clover seed reserves and regeneration could also be increased by using grazing management to reduce the level of shading of clover by perennials, a factor associated with reduced clover seed yield.

Variation in susceptibility of cultivars of Trifolium subterraneum to Kabatiella caulivora and in pathogenicity of isolates of the fungus as shown in germination-inoculation tests

1975 ◽  
Vol 26 (4) ◽  
pp. 647 ◽  
Author(s):  
K Helms
Keyword(s):  
Western Australia ◽  
New South ◽  
South Australia ◽  
Trifolium Subterraneum ◽  
Leaf Production ◽  
South Wales ◽  
Kabatiella Caulivora ◽  
Susceptible Group ◽  
Time Of Harvest ◽  
Different Parts

Seedlings of six cultivars of Trifolium subterraneum were tested during germination for resistance to Kabatiella caulivora, and gave results comparable with those obtained with seedlings inoculated by spraying at 1–4 weeks after sowing. Advantages of the method were that a large number of seedlings could be screened under uniform conditions with the minimum of time and space. Within the more susceptible group of cultivars, Woogenellup and Bacchus Marsh were usually more susceptible than Yarloop and Mt. Barker; these in turn were more susceptible than Clare, and Clare more susceptible than Daliak. For all cultivars except the highly resistant cultivar, Daliak, there was a correlation between the rate of trifoliolate leaf production and susceptibility to the disease, the most susceptible being those with most leaves expanded at the time of inoculation and with most leaves present at the time of harvest. Physiologic specialization in isolates of the pathogen from different parts of Australia was demonstrated. In general, one isolate from South Australia was more pathogenic than a group of isolates from South Australia, Victoria and Western Australia; these in turn were more pathogenic than one isolate from New South Wales, which was somewhat atypical in culture, and one from Victoria which was markedly atypical in culture.

Effect of management system and stocking rate on the performance of ewes and lambs

1976 ◽  
Vol 16 (83) ◽  
pp. 810 ◽  
Author(s):  
BD Hill ◽  
DG Saville
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Management System ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
The Body ◽  
Stocking Rate ◽  
Wool Production ◽  
South Wales ◽  
Lamb Growth

A grazing experiment was conducted at Cowra, on the western slopes of New South Wales, on a pasture consisting of lucerne (Medicago sativa) and annual species including capeweed (Arctotheca calendula), barley grass (Hordeum leporinum). wimmera ryegrass (Lolium rigidum) and subterranean clover (Trifolium subterraneum) . The performance of Border Leicesterx Merino ewes mated to Dorset Horn rams and the growth of their progeny was compared under rotational and set stocked grazing management systems, with and without a 20 per cent area of lucerne saved for grazing when additional feed was required. There was one stocking rate (8.7 ewes ha-1) in 1966 and two (8.7 ewes ha-1 and 13.0 ewes ha-1) in 1967 to 1969. Rotational grazing decreased the lamb growth rate but increased the number of lambs born. The management system did not affect the body weight or wool production of the ewes. Lucerne was quickly eliminated from the set stocked areas and was greatly reduced in the rotational systems. Capeweed became dominant in the set stocked areas. Saving increased the number of lambs born at the high stocking rate in 1967 to 1969. In 1966 saving reduced lamb growth, ewe body weight and wool growth in the rotational system. The high stocking rate increased wool production per hectare, but decreased the number of lambs born and, in 1967, the lamb growth rate.

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