BREEDING A WHITE CLOVER ADAPTED TO SOUTHERN LOWLAND REGIONS OF NEW ZEALAND

1985 ◽  
pp. 203-207
Author(s):  
K.H. Widdup
Keyword(s):  
New Zealand ◽  
White Clover ◽  
Trifolium Repens ◽  
Growth Habit ◽  
Agronomic Performance ◽  
Sheep Grazing ◽  
Growth Morphology ◽  
Active Growth ◽  
Hill Country ◽  
Trifolium Repens L

White clover populations from Europe and New Zealand together with ecotypes collected from old pastures in Southland-Otago were evaluated as spaced plants at Gore. Plants were screened for herbage production and morphological and flowering characteristics. The Southland ecotypes and North Island hill country material are adapted to active growth in spring and summer. Their dense growth habit ensures continued production of branched stolons from nodal meristems which is necessary for high clover yield and persistence under intensive sheep grazing. In this region flowering characteristics are unimportant in relation to agronomic performance. Some largerleaved Huia and French lines have high-yielding features which are evident during autumn under lenient grazing. Hybrids between superior plants showing adaptive and high yie!ding features are being screened in order to select new types with the desired characteristics. Keywords: White clover, Trifolium repens L., plant breeding, southern region, ecotypes, growth, morphology.

THE PERFORMANCE OF S170 TALL FESCUE IN CANTERBURY

1974 ◽  
pp. 214-215
Author(s):  
B.R. Watkin
Keyword(s):  
New Zealand ◽  
White Clover ◽  
Tall Fescue ◽  
Trifolium Repens ◽  
Festuca Arundinacea ◽  
Sheep Grazing ◽  
Selection Of

AN Aberystwyth selection of tall fescue (Festuca arundinacea Schreb.), known as S170, was sown with certified New Zealand white clover (Trifolium repens) and re' clover (T. pratense) and compared under sheep grazing with other grass/clover pastures at the Grasslands Division Regional Station at Lincoln (Watkin, 1975) .

scholarly journals Enhanced drought tolerance in white clover

1993 ◽  
pp. 97-100
Author(s):  
J. Van den Bosch ◽  
I.K. Black ◽  
G.R. Cousins ◽  
D.R. Woodfield
Keyword(s):  
New Zealand ◽  
Drought Tolerance ◽  
White Clover ◽  
Trifolium Repens ◽  
Root Morphology ◽  
Forage Yield ◽  
Plant Survival ◽  
Breeding Programmes ◽  
Trifolium Repens L ◽  
Per Se

Drought-stress limits white clover (Trifolium repens L.) persistence in many New Zealand regions. As a component of breeding for enhanced drought tolerance, 8 selection groups (110 lines in total) of white clover were evaluated in the Wairarapa over a 2-year period. The selection groups included Australian white clover ecotypes, selections from New Zealand dryland populations, root morphology selections, pre-release selections from New Zealand breeding programmes, and existing overseas and New Zealand cultivars. The selection groups derived from New Zealand dryland populations had the highest forage yield and plant survival, 21 of the 24 individual lines with >30% plant survival coming from these groups. Groups containing Australian ecotypes and overseas cultivars had the lowest forage yield and plant survival. Selections for root morphology per se were lower yielding and less persistent than selections made from New Zealand dryland populations evaluated in drought-prone environments. However, some improvements in forage yield and persistence were observed through selecting for root morphology after screening the same New Zealand dryland populations in a drought-prone North Canterbury site. Keywords: drought tolerance, plant breeding, root morphology, Trifolium repens

scholarly journals PERFORMANCE OF WHITE CLOVER LINES ON NEW ZEALAND HILL COUNTRY

1978 ◽  
pp. 162-169
Author(s):  
W.M. Williams ◽  
J.R. Caradus
Keyword(s):  
New Zealand ◽  
New Hampshire ◽  
White Clover ◽  
Sheep Grazing ◽  
Production Potential ◽  
Strong Argument ◽  
Hill Country ◽  
The Third ◽  
Infertile Soils ◽  
Better Than

Eighty-two white clover lines from overseas and 13 hill country collections from within New Zealand have been examined on a hill country site for their persistence and production potential under sheep grazing on infertile soils. By the third year of the trial only seven lines were equal to or better than Huia. These included only two overseas lines (one cultivar from France ('Crau') and a line from New Hampshire, U.S.A.) and five of the 13 collections from New Zealand hill country. This is considered to be a strong argument for the use of New Zealand material in breeding white clover for New Zealand hill country conditions.

Yield and stolon characteristics of white clover (Trifolium repens L.) cultivars in perennial pasture in Victoria

1997 ◽  
Vol 37 (2) ◽  
pp. 159 ◽  
Author(s):  
S. G. Clark ◽  
M. J. McFadden
Keyword(s):  
White Clover ◽  
Trifolium Repens ◽  
Leaf Size ◽  
Summer Drought ◽  
Sheep Grazing ◽  
Drought Period ◽  
Diverse Range ◽  
Herbage Yield ◽  
Seed Reserves ◽  
Trifolium Repens L

Summary. The herbage yield, stolon characteristics and soil seed reserves of a diverse range of white clover (Trifolium repens L.) cultivars were studied at Hamilton in south-western Victoria. The cultivars were sown with perennial grass (Phalaris aquatica L.) and the pasture was rotationally grazed by sheep. The aim of the study was to identify white clover types which would persist under sheep grazing. The widely used cultivar, Haifa, fails to persist in this environment. Cultivars were divided into 3 groups depending on leaf size (range 2.5–13.0 cm2). Large-leaved cultivars were the most productive in the first year of the experiment but by year 3 some of the intermediate leaf-size cultivars were the most productive. Haifa (large leaved) was particularly unproductive in the third year compared with other large and intermediate leaf-size cultivars. Stolon characteristics were measured in early spring 1987, mid summer 1988 and early autumn 1988. Total stolon yield on each occasion was 0.46–0.99, 0.65–1.68 and 0.05–0.25 t DM/ha respectively. Intermediate leaf- size cultivars tended to have the highest stolon yields on each occasion. Stolon yield declined at the same rate (mean 87%; range 81–92%) in all cultivars between the second and third sampling date indicating that there is no variation in the cultivars’ ability to survive the summer drought period. Although seed reserves for most cultivars were high at the end of the experiment (range 11–130 kg/ha) no seedling recruitment was observed and seed is thought to play no role in sward survival in this environment. Plant breeders developing white clover cultivars for this environment should concentrate on maximising stolon yield at the beginning and end of the summer drought period (January–mid March). Intermediate leaf-size genotypes are likely to provide the best combination of stolon and herbage yield. Grazing management should also aim to maximise stolon yield at these critical times. The use of large-leaved, non-stoloniferous cultivars should be discouraged by advisers as they are not suited to this marginal environment under sheep grazing.

PASTURE COMPOSITION UNDER MIXED SHEEP AND GOAT GRAZING ON HILL COUNTRY

1984 ◽  
pp. 160-166
Author(s):  
D.A. Clark ◽  
M.P. Rolston ◽  
M.G. Lambert ◽  
P.J. Budding
Keyword(s):  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
White Clover ◽  
Trifolium Repens ◽  
Accumulation Rate ◽  
Botanical Composition ◽  
Lolium Perenne L ◽  
Hill Country ◽  
Agrostis Tenuis ◽  
Trifolium Repens L

Hill country pasture was grazed by the following ratios of goats and sheep from 1979-l 983: 100% goats (Goat 100). 66% goats and 34% sheep (Goat 66)) 33% goats and 67% sheep (doat 33), 100% set-stocked sheep (Sheep 100) and 100% mobstocked sheep. Changes in botanical composition, herbage mass and herbage accumulation rate were measured by sample dissection, visual estimation and trimmed exclosure cages respectively on three slope classes (banks, slopes and tracks). Pastures grazed by goats developed Yorkshire fog IHolcus lanatus)- white clover (Trifolium repens L.) associations with strong white clover growth on all slope classes unlike sheep-grazed pastures which contained little white clover and were dominated by perennial' ryegrass (Lolium perenne L.) and browntop (Agrostis tenuis Sibth.). The herbage mass of 3000, 1830, 1410 kg DM/ha on banks, slopes and tracks respectively for Sheep 100 pastures contrasted with that on the Goat 100 pastures of 2030, 3750 and 4300 kg DM/ha. White clover was enhanced on all slope classes in the Goat 100 treatment. Annual herbage accumulation was greater on the Goat 100 than Sheep 100 pastures, 13.9 and 11.2 t DM/ha respectively. There was a close association between increased annual white clover accumulation and tofal herbage accumulation. The complementary nature of sheepandgoatgrazing behavioursuggeststhe possibility of increased meat and fibre production from mixed grazing. The implications of these results for future research are discussed. Keywords: Sheep, goats, herbage mass, herbage accumulation rate, botanical composition, slope classes, white clover (Trifolium repens L.), perennial ryegrass (Lolium perenne L.), Yorkshire fog (Holcus lanatusl, browntop (Agrostis tenuis Sibth.).

WHITE CLOVER OPTIONS FOR SHEEPFARMING IN SOUTHERN REGIONS OF NEW ZEALAND

1989 ◽  
pp. 175-179
Author(s):  
D.L. Ryan
Keyword(s):  
New Zealand ◽  
White Clover ◽  
Trifolium Repens ◽  
Climatic Conditions ◽  
Grazing Management ◽  
Sheep Grazing ◽  
Rotational Grazing

Four white clover cultivars 'Grasslands tluia', 'Grasslands Tahora', 'Grasslands Kopu' and 'Grasslands Pit& were evaluated at Grasslands Division, Gore, for 4 years, under 2 grazing managements. Year round rotational grazing was compared with rotational grazing incorporating a 1 P-week period of set stocking during spring. Huia was the best cultivar under both grazing managements. Tahora yields were comparable with those of Huia in spring and summer, and ryegrass yields were best in Tahora wards. The larger leaved and less stoloniferous Kopu and Pitau were not suited to the climatic conditions or the mtensive sheep grazing practices of the region. Keywords: Trifolium repens, Huia, Tahora, Pitau. KOPU, grazing management, stolon morphology, persistence, sheepfarming

Genotypic evaluation of introduced white clover (Trifolium repens L.) germplasm in New Zealand

2016 ◽  
Vol 67 (8) ◽  
pp. 897 ◽  
Author(s):  
M. Z. Z. Jahufer ◽  
J. L. Ford ◽  
D. R. W. Woodfield ◽  
B. A. Barrett
Keyword(s):  
New Zealand ◽  
White Clover ◽  
Trifolium Repens ◽  
Dry Matter ◽  
Allelic Variation ◽  
Genotypic Variation ◽  
Dry Matter Yield ◽  
Breeding Lines ◽  
F1 Progeny ◽  
Trifolium Repens L

Optimal evaluation and use of introduced germplasm for species improvement is an ongoing challenge. Research was conducted to survey a select set of introduced white clover (Trifolium repens L.) germplasm from broad geographic origins to assess their genetic potential, based on F1 crosses to elite New Zealand cultivars. The bulk progeny generated from test crosses to Grasslands cultivars Demand, Sustain and Kopu II were evaluated at Palmerston North under rotational grazing by sheep. The replicated trial consisted of the 26 germplasm accessions, three cultivars used as maternal parents, and 78 F1 bulk progeny breeding lines. Three morphological traits and estimated seasonal dry matter yield were measured over four years. Significant (P < 0.05) genotypic variation was observed for all these traits among the parents and F1 progeny lines. F1 progeny lines with traits values greater than the cultivars were identified. Significant (P < 0.05) genotype-by-season (σ2gs) and genotype-by-year (σ2gy) interactions were estimated for dry matter yield. Principle component analysis of the F1 progeny-by-trait BLUP matrix identified 16 elite progeny lines with mean seasonal dry matter yield equal to or higher than the cultivars. Half of the lines had Demand as the cultivar parent, while only three had Kopu II as a parent. Fourteen of these progeny lines were derived from crosses to Australasian adapted germplasm. This study indicated that choice of adapted cultivar with which to cross is important, and introduced germplasm from Australasia is a valuable source of adaptive variation in these F1 progeny. More complex approaches may be needed to identify and use adaptive allelic variation from germplasm sources beyond Australasia.

scholarly journals Trends in the global marketing of white clover cultivars

1996 ◽  
Vol 6 ◽  
pp. 7-14
Author(s):  
R.D.J. Mather ◽  
D.T. Melhuish ◽  
M. Herlihy
Keyword(s):  
New Zealand ◽  
South America ◽  
White Clover ◽  
Trifolium Repens ◽  
Western Europe ◽  
Leaf Size ◽  
Global Market ◽  
Production Region ◽  
Trifolium Repens L ◽  
Clover Seed

White clover (Trifolium repens L.) is the dominant legume of temperate pastures, having been improved by breeding since the 1930s. The 1994 OECD Register lists 93 cultivars, with a further 25-30 cultivars also known to commerce. Therefore, in excess of 100 cultivars are available to fulfil a world annual market of 8500-10,500 MT. Globally, New Zealand is the major white clover production region, providing 50- 55% of the seed. Other key production regions are Denmark, USA and South America. Consumption of white clover has been relatively static for some time, ranging from 8000-10,000 MT per annum. Between 55-60% of the seed is used in the northern hemisphere (approx. 40% by Western Europe - UK, France, Germany). USA, South America and New Zealand all consume similar tonnages annually (approx. 1000-2000 MT each) with smaller tonnages used in Australia. One cultivar, Grasslands Huia, has dominated the world white clover seed market for many years and it still remains the world's major cultivar by volume. However, in the last 10 years its position has come under increasing pressure from New Zealand and international proprietary cultivars. Eventually proprietary cultivars with improved agronomic performance will supersede the consumption of commodity/public white clovers in those countries where national listing is required to obtain release and recommended listing is need to ensure successful marketing. Despite this, Grasslands Huia will continue for many years to play a major role in supplying markets where national listing is not a prerequisite to release and price is a major factor in purchase decisions. Keywords: commodity cultivar, global market, Grasslands Huia, leaf size, market share, production trends, proprietary cultivar, seed industry, Trifolium repens L., white clover

scholarly journals Factors affecting white clover persistence in New Zealand pastures

1996 ◽  
pp. 229-235 ◽  
Author(s):  
D.R. Woodfield ◽  
J.R. Caradus
Keyword(s):  
New Zealand ◽  
Plant Breeding ◽  
White Clover ◽  
Trifolium Repens ◽  
Plant Nutrition ◽  
Grazing Management ◽  
Yield Potential ◽  
Trifolium Repens L ◽  
Grass Growth ◽  
The Impact

Better persistence and reliability of white clover (Trifolium repens L.) is critical in achieving a more competitive New Zealand farming industry. To persist, white clover must establish well and withstand the accumulated stresses of competition from associated grasses, grazing, variable soil fertility, drought, plus pest and disease pressure. These factors vary markedly with environment and farming system, making the choice of appropriate grazing management, plant nutrition, companion species and cultivar difficult. White clover is particularly vulnerable to mismanagement and environmental stresses during spring when plant size is at its smallest. This vulnerability is further compounded by the current trend in dairying to apply high rates of nitrogen (N) which favours grass growth more than clover growth. A faster grazing rotation and/or higher stocking rates can offset the adverse effects of N on white clover by utilising the additional grass produced and reducing competition for light. Irrespective of N inputs, frequent defoliation during spring favours white clover persistence by increasing grass tiller density, resulting in better ground cover and in lower soil surface temperatures in summer. There is a threshold above which the density of associated grass suppresses clover growth. This is most prevalent in swards containing browntop, cocksfoot and kikuyu, which are more competitive against white clover than tall fescue, timothy and perennial ryegrass. Plant breeding efforts to improve persistence concentrate on increasing the rate of stolon formation and decreasing the rate of stolon death. These efforts include selecting genotypes that have better spread and persistence in association with different grasses, and genotypes that continue to grow with lower inputs of phosphate. Changes in root morphology have enhanced persistence under moderate drought stress, while significant improvements in resistance to clover cyst nematode, root-knot nematode and clover flea offer real hope in reducing the impact of these pests. Developing cultivars with higher stolon growing point densities at a particular leaf size should improve persistence while maintaining the greater yield potential. Keywords: climatic stresses, competition, diseases, grazing management, pests, plant breeding, plant nutrition, Trifolium repens L.

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