Genotypic variation for stolon and other morphological attributes of white clover (Trifolium repens L.). Populations and their influence on herbage yield in the summer rainfall region of New South Wales

1994 ◽  
Vol 45 (3) ◽  
pp. 703
Author(s):  
MZZ Jahufer ◽  
M Cooper ◽  
LA Brien
Keyword(s):  
White Clover ◽  
Genotypic Variation ◽  
Germplasm Collection ◽  
Summer Rainfall ◽  
Leaf Length ◽  
Active Group ◽  
Morphological Attributes ◽  
South Wales ◽  
Herbage Yield ◽  
Plant Attributes

A random sample of 60 germplasm accessions from the Australian white clover germplasm collection was characterized in the field at Glen Innes, N.S.W. Genotypic variation for stolon and other morphological attributes was measured in one season. Herbage yield was evaluated over seven seasons to quantify the magnitude of accession-by-season interaction. There were significant (P < 0.01) differences among accessions, seasons, and accession-by-season interactions for herbage yield. Classification was used to group the accessions on their seasonal herbage yield. A summer active group, a winter active group and a group showing autumn activity for herbage yield were identified. There was significant (P < 0.01) variation among accessions for all plant attributes measured and their accession mean repeatability was moderate to high. There were strong genotypic correlations among the morphological attributes. Five of the morphological attributes (stolon density, stolon branching, plant spread, plant height, stolon thickness and leaf length) expressed a strong genotypic correlation with average herbage yield over seven seasons. The genotypic variation estimated for herbage production and plant attributes signifies the potential of the collection to be used as a source of variation for the genetic improvement of productivity and perenniality of white clover for Australian environments.

Corrigendum - Genotypic variation for stolon and other morphological attributes of white clover (Trifolium repens L.). Populations and their influence on herbage yield in the summer rainfall region of New South Wales

1994 ◽  
Vol 45 (3) ◽  
pp. 703
Author(s):  
MZZ Jahufer ◽  
M Cooper ◽  
LA Brien
Keyword(s):  
White Clover ◽  
Genotypic Variation ◽  
Germplasm Collection ◽  
Summer Rainfall ◽  
Leaf Length ◽  
Active Group ◽  
Morphological Attributes ◽  
South Wales ◽  
Herbage Yield ◽  
Plant Attributes

A random sample of 60 germplasm accessions from the Australian white clover germplasm collection was characterized in the field at Glen Innes, N.S.W. Genotypic variation for stolon and other morphological attributes was measured in one season. Herbage yield was evaluated over seven seasons to quantify the magnitude of accession-by-season interaction. There were significant (P < 0.01) differences among accessions, seasons, and accession-by-season interactions for herbage yield. Classification was used to group the accessions on their seasonal herbage yield. A summer active group, a winter active group and a group showing autumn activity for herbage yield were identified. There was significant (P < 0.01) variation among accessions for all plant attributes measured and their accession mean repeatability was moderate to high. There were strong genotypic correlations among the morphological attributes. Five of the morphological attributes (stolon density, stolon branching, plant spread, plant height, stolon thickness and leaf length) expressed a strong genotypic correlation with average herbage yield over seven seasons. The genotypic variation estimated for herbage production and plant attributes signifies the potential of the collection to be used as a source of variation for the genetic improvement of productivity and perenniality of white clover for Australian environments.

Variation among low rainfall white clover (Trifolium repens L.) accessions for morphological attributes and herbage yield

1995 ◽  
Vol 35 (8) ◽  
pp. 1109 ◽  
Author(s):  
MZZ Jahufer ◽  
M Cooper ◽  
LA Lane
Keyword(s):  
White Clover ◽  
Genetic Improvement ◽  
New South ◽  
Genotypic Variation ◽  
Summer Rainfall ◽  
Morphological Attributes ◽  
South Wales ◽  
Herbage Yield ◽  
Passport Data ◽  
Collection Sites

The importance of passport data on rainfall at collection sites of accessions as a guide to identifying germplasm to be used in the genetic improvement was assessed by using 40 white clover accessions from the germplasm collection at Glen Innes, New South Wales. This set together with 2 standard cultivars, Haifa and Huia, were evaluated in the field. The objectives were to: (i) estimate the magnitude of genotypic variation among accessions for morphological attributes and herbage yield in a dryland summer rainfall environment; and (ii) compare estimates of genotypic variation for, and correlations among, the attributes and herbage yield for the 40 accessions with results from a study based on a random sample of accessions from the same collection. Herbage yield was measured in 4 seasons (autumn 1992-summer 1993) together with stolon and other plant attributes which were measured in 1 season (summer 1993). There was significant (P<0.05) variation for herbage yield among accessions. Hierarchical agglomerative classification was used to group the accessions based on herbage yield. This identified a single member group with greater herbage yield than the 2 groups which contained the cultivars Haifa and Huia. There was no association between the composition of the accession groups identified by classification and the passport data on average annual rainfall at the collection sites of accessions. There was some consistency between the estimates of repeatability, genotypic variation and genotypic correlations obtained from the low rainfall set of accessions used in this study and the random sample previously examined. It was concluded that selection of accessions from the collection for use in genetic improvement of herbage yield and the morphological attributes for dryland summer rainfall environments of the Northern Tablelands of New South Wales. should not be confined to specific groups originating from low rainfall regions.

Productivity of pasture legumes and chicory in central New South Wales

2002 ◽  
Vol 42 (1) ◽  
pp. 15 ◽  
Author(s):  
D. R. Kemp ◽  
D. L. Michalk ◽  
M. Goodacre
Keyword(s):  
White Clover ◽  
New South ◽  
New South Wales ◽  
Subterranean Clover ◽  
Summer Rainfall ◽  
Annual Rainfall ◽  
Summer Drought ◽  
Potential Yield ◽  
Pasture Legumes ◽  
South Wales

Seven experiments were established across a range of environments (latitude 33°S) in central New South Wales to evaluate 52 legume cultivars and lines against currently recommended cultivars. Plots were grazed by either sheep or cattle after each harvest. Criteria for inclusion were that lines were either commercially available or in the process of being registered. Three experiments also included chicory. Sites had from 600 to 900 mm annual rainfall and were at altitudes of 440–1000 m. The 4-year program included the dry summer of 1990–91. White clover and subterranean clover were the most productive species over time. Among subterranean clovers, the subspecies subterraneum cultivars were more productive than the yanninicum or brachycalycinum subspecies. Other species such as balansa, Persian, strawberry, red and crimson clovers, lotus major and murex medic were more variable in production. These legumes often grew well in the establishment year, but failed to persist. Lucerne was in general, not as productive as white or subterranean clover. Caucasian clover and yellow serradella should be evaluated further as conclusive judgements could not be formed. Chicory was often the most productive species in the experiments, especially over the warmer 6 months of the year. It persisted under a 6-week harvest regime and during the drought year. The newer subterranean clover cultivars, Leura, Goulburn and Denmark all exceeded the production from the previously recommended cultivars, Woogenellup and Karridale, even though no major disease was evident in the later group. The lines 89820D and 89841E were sufficiently productive to warrant further evaluation and possible development as cultivars. In contrast, while Huia, Tahora, Bonadino and Tamar were often as productive as the recommended white clover cultivar Haifa, they were not consistently better. Where summer rainfall occurs and the annual rainfall exceeds 650 mm, the greater potential yield of white clover compared with subterranean clover justifies its use. However, no white clover cultivars survived the summer drought in 1990–91 as intact plants. Further work is needed to develop more drought-tolerant cultivars.

White clover responses to phosphorus and sulphur on granitic soils

1976 ◽  
Vol 16 (79) ◽  
pp. 234 ◽  
Author(s):  
ICR Holford ◽  
AC Gleeson
Keyword(s):  
White Clover ◽  
Maximum Yield ◽  
Phosphorus Uptake ◽  
Nitrogen And Phosphorus ◽  
South Wales ◽  
Coefficients Of Variation ◽  
Herbage Yield ◽  
Nitrogen And Phosphorus Uptake ◽  
One Year ◽  
Intermediate Rate

Responses in herbage yield, nitrogen uptake and phosphorus uptake by white clover pasture to phosphorus and sulphur application were measured on very phosphorus-deficient granitic soils in the Northern Tablelands of New South Wales. The factorial experiment with six rates of P and three of S was repeated over three years (1966, 1967 and 1968) and at three sites. Coefficients of variation of up to 48 per cent indicated considerable within-site variability in herbage yields. Variation among years was caused mainly by variations in incident rainfall. Very large and highly significant responses in all variables to phosphorus occurred at every harvest regardless of the amount of incident rainfall or applied sulphur. However phosphorus responses were greater with increasing rainfall and in the presence of sulphur. To achieve at least 85 per cent of the maximum recorded yield in any one year, 48 to 73 kg P ha-1, were required. Responses to phosphorus were 1000-2000 kg ha-1 with 150 mm rainfall and up to 3000-4500 kg ha-1 with 450 mm rainfall during the growing season. Responses to sulphur were much smaller and less consistent, and occurred only in the presence of applied phosphorus. They also increased with increasing rainfall. The intermediate rate of 28 kg S ha-1 gave the maximum yield of herbage. Sulphur had a larger effect on nitrogen and phosphorus uptake than on herbage yield.

Evaluation of White Clover (Trifolium repens L.) Germplasm for Different Agro-Morphological Traits Diversity in Mid-Himalayan Region

2019 ◽  
Author(s):  
Tejveer Singh ◽  
Dibyendu Deb ◽  
Sudesh Radotra
Keyword(s):  
Seed Yield ◽  
White Clover ◽  
Morphological Traits ◽  
Biomass Yield ◽  
Genotypic Variation ◽  
Germplasm Collection ◽  
Principal Component ◽  
Yield Potential ◽  
Improvement Program ◽  
Common Component

White clover (Trifolim repens L.) is one of the most nutritious and widely grown forage legumes in the world. It is also a common component of cool season perennial grass pastures in Indian Mid-Himalayas. Being an important component of temperate grassland, diminutive efforts have been made in genetic improvement of white clover through comprehensive evaluation of germplasm collection. In present study, total 258 germplasm accessions of white clover were characterized under field conditions for the genotypic variation in twenty five agro-morphological traits. Characterized germplasm showed sufficient variation among the populations for qualitative traits, biomass yield and seed yield as revealed by range and coefficient of variation. Association analysis showed that dry matter yield was positively correlated with seed yield components traits. Principal component analysis revealed that first seven principal components accounted more than 60% of total variation. Out of 258, ten high biomass producing populations were selected and further evaluated for biomass yield, crude protein and seed yield potential. Average biomass yield of three populations viz., RRCPL-13 (15.74 q/ha/year), RRCPL-19 (17.25 q/ha/year), RRCPL-27 (18.79 q/ha/year) were better than the check variety Palampur Composite-1 (14.99 q/ha/year). Results of this study will help in designing future strategy in white clover improvement program for the development of new varieties. Also, the seeds extracted from Legon 18 had higher viability than BAG 14/001 at all maturity stages.

Genetic variation within white clover (Trifolium repens L.) populations from north-central Victoria

1993 ◽  
Vol 33 (3) ◽  
pp. 333 ◽  
Author(s):  
CK Lee ◽  
HA Eagles ◽  
NM McFarlane ◽  
KB Kelly
Keyword(s):  
White Clover ◽  
Trifolium Repens ◽  
Genotypic Variation ◽  
Leaf Length ◽  
Improvement Program ◽  
North Central ◽  
Central Victoria ◽  
Stolon Length ◽  
Population Improvement ◽  
Trifolium Repens L

A collection of regional white clover (Trifolium repens L.) populations in north-central Victoria was made from 42 farms sown to cv. Irrigation 20-55 years ago. The collection was evaluated for characters known to be associated with productivity and persistence, with the objectives of assessing the extent of genotypic variation within the collection and determining its suitability for a long-term population improvement program for Victoria. Some regional populations of cv. Irrigation have reduced leaf and stolon sizes compared with recently sown and commercial seed farm populations. In a broadbased population derived from this collection, genetic variances and broad sense heritability estimates were high for leaf length and width, and for stolon length, characters related to productivity and persistence. These populations of cv. Irrigation may form the basis of a population improvement program to develop more productive, persistent cultivars for Victoria.

scholarly journals Foliar spray of gibberellic acid influences morphological attributes and foliage yield of coriander (Coriandrum sativum L.)

2018 ◽  
Vol 5 (1) ◽  
pp. 1-9
Author(s):  
Dhiman Das ◽  
Asim Kumar Bhadra ◽  
Mohd Moniruzzaman
Keyword(s):  
Gibberellic Acid ◽  
Vegetative Growth ◽  
Leaf Length ◽  
Distilled Water ◽  
Water Spray ◽  
Single Plant ◽  
Plant Weight ◽  
Morphological Attributes ◽  
Number Of Leaves ◽  
Different Doses

A field experiment was conducted at the research field of Sher-e- Bangla Agricultural University, Dhaka during the period from December 1, 2016 to January 11, 2017 to investigate the effect of gibberellic acid (GA3) on vegetative growth, morphological attributes and foliage (leaf) yield of coriander (Coriandrum sativum L.). The experimental treatments consisted of eight different doses of GA3 viz., 0 (distilled water spray), 5, 10, 15, 20, 25, 30 and 35 ppm. The variety Rosina (Pahuja Co., India) was used as planting material and different doses of GA3 were applied on the plants at 25 and 30 days after sowing. The experiment was laid out in Randomized Complete Block Design with three replications. GA3 had significant effect on vegetative growth, morphology, foliage yield and yield contributing characters of coriander. Plant height, number of leaves plant-1, leaf length, plant spread and single plant weight were found maximum from the application of GA3 at 20 ppm, which was closely followed by 25 ppm GA3. Application of GA3 at 20 ppm produced the highest weight of foliage m-2. A strong positive correlation of foliage yield was observed with plant height, number of leaves plant-1, leaf length, plant spread, single plant weight and weight of foliage m-2. Application of GA3 at 20 ppm gave maximum foliage yield (9.34 t ha-1) which was followed by GA3 at 15 ppm (8.46 t ha-1) and 25 ppm (8.06 t ha-1), and the minimum foliage yield was recorded from control (distilled water spray) (4.90 t ha-1). Application of GA3 at 20 ppm increased foliage yield over control by 47.54 %. A quadratic relationship between applied GA3 concentration and foliage yield was found; the regression equation was y = 4.87 + 0.375x – 0.009x2 from which it came up to be optimum dose of GA3 as 20.83 ppm.Res. Agric., Livest. Fish.5(1): 1-9, April 2018

Relative performance of white clover (Trifolium repens) cultivars and experimental synthetics under rotational grazing by beef cattle, dairy cattle and sheep

2021 ◽  
Vol 72 (11) ◽  
pp. 926
Author(s):  
M. Z. Z. Jahufer ◽  
J. L. Ford ◽  
G. R. Cousins ◽  
D. R. Woodfield
Keyword(s):  
Beef Cattle ◽  
Dairy Cattle ◽  
White Clover ◽  
Trifolium Repens ◽  
Genotypic Variation ◽  
Relative Performance ◽  
Seasonal Growth ◽  
Sheep Grazing ◽  
Rotational Grazing ◽  
Average Performance

Assessment of the relative performance of white clover (Trifolium repens L.) cultivars, using multi-year and multi-location seasonal growth trials, is key to identification of material with specific and broad adaptation. This paper is based on a multi-year and multi-location study of 56 white clover entries comprising 14 commercial cultivars and 42 experimental synthetic lines evaluated for seasonal growth under rotational grazing across four locations in New Zealand over 4years. The four locations (and animals grazing) were: Kerikeri (beef cattle), Aorangi (beef cattle), Ruakura (dairy cattle), Lincoln (sheep). Significant (P&lt;0.05) genotypic variation among the 56 entries, and genotype × year, genotype× location and genotype× season interactions, were estimated. We were able to identify cultivars and experimental synthetics with specific and broad adaptation to the three grazing management types. Cvv. AberDance, Apex, Demand, Prestige, Quartz and Riesling, with leaf size ranging from small to medium–large, showed highly above-average performance under sheep grazing. Synthetic lines 15 and 45 also had highly above-average performance under sheep grazing. Cvv. Legacy and Kopu II showed above-average performance under cattle and dairy grazing. Synthetics 15, 48, 49, 44, 22 and 18 and cv. Quartz had above-average performance under all three grazing managements. Synthetics 27, 33 and 38 had highly above-average performance across all three grazing managements and were superior to all 14 cultivars evaluated. Several of these superior synthetics are being tested across multiple grazing environments. Among the 14 cultivars evaluated, Legacy and Quartz showed superior seasonal growth performance across the three grazing managements. Quartz is being evaluated in several on-farm trials across temperate regions of the world.

Characterisation of naturalised strains of Trifolium subterraneum var. brachycalycinum cv. Clare in northern New South Wales

1994 ◽  
Vol 34 (1) ◽  
pp. 33 ◽  
Author(s):  
GM Lodge
Keyword(s):  
Seed Weight ◽  
New South ◽  
New South Wales ◽  
Trifolium Subterraneum ◽  
Summer Rainfall ◽  
Median Number ◽  
South Wales ◽  
The Mean ◽  
Floral Characters ◽  
Number Of Seeds

Burrs were collected from paddocks on 3 properties in northern New South Wales where the age of the Trifolium subterraneum var. brachycalycinum cv. Clare swards varied from 19 to 28 years. At 1 site burrs were also sampled from swards sown 2 and 10 years previously. Twenty seedlings from these burrs and 20 plants of certified cv. Clare were grown as spaced plants in a nursery. These were assessed for vegetative and floral characters, flowering time, number of seeds per burr, seed weight, and percentage hardseed after storage at 25/25�C for 6 months and 25/45�C for a further 6 months. For most plants the mean number of days from sowing to first flower was similar to that of Clare. Compared with the naturalised strains, Clare had the lowest (P<0.05) mean number of seeds per burr: about 25% below the mean of the strains (2.7 seeds per burr). While the lowest mean seed weights of the strains were not significantly different from those of Clare, the seed weights of plants from 3 sites were higher (P<0.05) than those of Clare. After storage for either 6 or 12 months, hardseed levels were also lowest (P<0.05) for Clare. Plants from the 2-year-old sward had the same median number of seeds per burr (2.0) as Clare. As sward age increased, the median number of seeds per burr increased to 2.8. Hardseed percentages were lowest for plants of Clare and for those from the 2-year-old sward after 6 months, and for Clare after 12 months. These studies indicated the presence of divergent strains in old swards of Clare in a summer rainfall environment. Natural selection among variability within Clare is the most likely reason for the development of these strains in an environment marginal for the long-term persistence of this softseeded cultivar. Although strains had the same vegetative and floral markings as Clare, differences in ecologically important characters such as number of seeds per burr, seed weight, and hardseededness may result in plants that are better adapted to the environment in which they evolved. From these studies 23 plants of T. subterraneum var. brachycalycinum were selected for further evaluation.

Management of Lolium perenne/Trifolium repens pastures in the subtropics. II. Effect of summer defoliation, irrigation duration, seedbed preparation and pasture type

1994 ◽  
Vol 45 (3) ◽  
pp. 721 ◽  
Author(s):  
WJ Fulkerson ◽  
K Slack
Keyword(s):  
Survival Rate ◽  
Perennial Ryegrass ◽  
White Clover ◽  
North Coast ◽  
N Application ◽  
The North ◽  
South Wales ◽  
Summer Pasture ◽  
The Difference ◽  
Seedbed Preparation

This study on the north coast of New South Wales, Australia, evaluated the effect of irrigation and defoliation management over summer, pasture type and seedbed preparation on production and survival of a perennial ryegrass pasture over an 18-month period from sowing. In a relatively dry summer, irrigation sufficient only to keep plants growing, increased production of ryegrass plus clover from 2826 to 5515 and 3210 to 5396 kg DM/ha in summer and the subsequent autumn/winter, respectively, and increased survival of ryegrass plants by 34%. The more summer active Olwen white clover/NZA895 perennial ryegrass combination had a 16% higher production in summer, but a 11% lower production in winter than a Haifa/Yatsyn sward. The difference in production was entirely due to the clover component of the pasture. DM yield in the first growing season for the ryegrass/white clover pasture was equivalent to applying 20 kg N/ha/month to a pure ryegrass sward. In the subsequent summer/autumn/winter, the yield of pure ryegrass pasture was well below the ryegrass/white clover swards at any rate of N application. There was no difference between survival of NZA895 and Yatsyn ryegrass or incursion of summer grass into their respective plots. Plots defoliated over summer at 6 cm, as opposed to 12 cm, stubble height yielded 54% more edible DM and resulted in a 65% higher ryegrass plant survival rate. There was no effect on summer grass incursion. Multiple cultivations appear to be the key to appropriate seedbed preparation, with this treatment achieving the highest ryegrass survival rate, lowest summer grass incursion and highest DM yields.

Sign in / Sign up

Export Citation Format

Share Document