Conservation Of Grass Collections At The Western Regional Plant Introduction Station,
2024
USDA, Agricultural Research Service, Washington State University
Conservation Of Grass Collections At The Western Regional Plant Introduction Station, V L. Bradley, R C. Johnson
IGC Proceedings (1977-2023)
Germplasm managers at the Western Regional Plant Introduction Station (WRPIS) have focused on improving seed regeneration in forage and turf grass species through studies of diversity maintenance, using isozyme markers in annual ryegrass (Lolium multiflorum Lam.) and through studies of pollen isolation, using strains of dominant pubescent and recessive glabrous smooth bromegrass (Bromus inermis Leyss.). Balanced samples of annual ryegrass (an equal number of seeds per plant) from field plots were best for maintaining allelic frequencies, but genetic diversity (heterozygosity and allelic richness) was maintained nearly as well in bulk samples (seeds proportionally assembled according to seeds per …
Legume-Rhizobia Relationship In The Nitrogen Fixation Of A New Mediterranean Pasture Legume (Biserrula Pelecinus L.),
2024
Co-operative Research Center for Legumes, The University of Western Australia, Australia
Legume-Rhizobia Relationship In The Nitrogen Fixation Of A New Mediterranean Pasture Legume (Biserrula Pelecinus L.), A Loi, J G. Howieson, P S. Cocks, S J. Carr
IGC Proceedings (1977-2023)
Biserrula pelecinus (biserrula) is a pasture legume of Mediterranean climates. Because of its ability to survive on acidic and infertile soils, it has been introduced to southern Australia as a potential alternative or companion plant to serradella and subterranean clover. The successful introduction of this species will be reliant upon the selection of an appropriate inoculant strain of its root-nodule bacteria and understanding of its ecology. A selection of five rhizobial strains isolated from biserrula nodules collected in Sardinia and Greece were examined for their ability to nodulate and fix nitrogen with 3 genotypes of biserrula. Although all rhizobial strains …
Productivity Of Panicum Dichotomiflorum Michx., Promising New Forage Grass,
2024
Chungbuk National University, Department of Agronomy, Korea
Productivity Of Panicum Dichotomiflorum Michx., Promising New Forage Grass, Seung Keun Jong, Dong Sam Cho
IGC Proceedings (1977-2023)
Since summer growth of forage crops limits cattle grazing and hay production in Korea, it is important to exploit the natural resources which are suitable for forage production. A series of experiments to establish cultural management practice for Panicum dichotomiflorum MICHX. were carried out at the Experimental Farm of Chungbuk National University from 1993 to 1995. Stratification of seed promoted emergence and plant establishment. Although fresh and dry yield at the 1st harvest were closely related with number of plants established per unit area, total yield was less affected by number of plants at the early stage. P. dichotomiflorum MICHX. …
Origin Of The World's Collection Of The Tropical Forage Legume Chamaecrista Rotundifolia,
2024
ATFGRC, CSIRO, Division of Tropical Crops and Pastures, Australia
Origin Of The World's Collection Of The Tropical Forage Legume Chamaecrista Rotundifolia, B C. Pengelly, B L. Maass, B D. Thomas, J B. Hacker
IGC Proceedings (1977-2023)
Round leaf cassia (Chamaecrista rotundifolia) cv. Wynn is an important legume in light textured soils in sub-tropical Queensland and forage evaluators in other regions of the tropics frequently wish to include in their evaluation trials this cultivar plus other accessions which represent the variation in the species. Provenance data of a world collection of 130 accessions of round leaf cassia were examined and a core set of 26 accessions selected.
Ecovar Development On The Northern Great Plains Of North America,
2024
Agriculture & Agri-Food Canada
Ecovar Development On The Northern Great Plains Of North America, K W. May, B Wark, B Coulman
IGC Proceedings (1977-2023)
The objective of this study was to develop sources of seed of native plant species to facilitate commercial seed production of ecovars suitable for revegetation and reclamation of disturbed land. An ecovar or ecological variety is native plant material derived from a composite of germplasm collected throughout the area of adaptation and that contains the natural genetic diversity of the species. Ecovars are currently being developed or proposed for 24 species of grass, legume and shrub species from the northern great plains. The research is conducted by scientists at nine research centres from six agencies in two countries. Seed from …
Evaluation Of Tropical And Subtropical Forage Grasses In The Northwest Region Of Rio Grande Do Sul, Brazil,
2024
Faculdade de Agronomia, UFRGS, Brazil
Evaluation Of Tropical And Subtropical Forage Grasses In The Northwest Region Of Rio Grande Do Sul, Brazil, R B. Medeiros, J M. Souza, J E. G. Zambra
IGC Proceedings (1977-2023)
A collection of 137 accessions of tropical and subtropical grasses of Pennisetum purpureum (53), Panicum maximum (10), Brachiaria spp. (9), Hemarthria altissima (19), Setaria spp. (11), Digitaria spp. (22), Cynodon spp.(7) and Paspalum spp. (6) was evaluated for frost tolerance (FT), dry matter yield per cut (DMYC), number of cuts (NC) and accumulated dry matter yield per year (ADMY). Crude protein content (CPC), leaf/stem ratio (L/S), pubescence (P) and animal preference under grazing (AP) were also recorded in 20 entries of in P. purpureum. Data exploration involved cluster analysis and ordination, revealing the most promising entries among and within …
Evaluation Under Grazing Of Two Festuca Arundinacia Cultivars With Contrasting Growth Patterns,
2024
EEA-INTA, Argentina
Evaluation Under Grazing Of Two Festuca Arundinacia Cultivars With Contrasting Growth Patterns, A Mazzanti, M H. Wade
IGC Proceedings (1977-2023)
Two cultivars of Festuca arundinacea, one of temperate origin (El Palenque: PAL) with higher spring and summer growth and one of North African origin (Maris Kasba: MK) with higher winter growth, were compared under grazing during three years. They were grazed continuously, using a “put and take” system, by young steers and the swards maintained at equal heights, but which varied slightly between seasons. Daily live weight gain (LWG) and instantaneous stocking rate (ISR) were used to estimate productivity per unit area. There was no difference between cultivars in LWG, but consistent and important differences in ISR: MK carrying …
Relationships Among Some Lolium And Festuca Species,
2024
INRA, Clermont-Ferrand cedex
Relationships Among Some Lolium And Festuca Species, G Charmet, F Balfourier, C Ravel
IGC Proceedings (1977-2023)
Molecular markers were used to investigate phylogenetic relationships among the 8 species of ryegrass (Lolium) and 11 species of fescue (Festuca). Nine sequences of non-coding chloroplastic or mitochondrial DNA were amplified through PCR, then digested by 20 restriction enzymes. Restriction sites data were used to draw an UPGMA tree. The main features are: 1) a clear-cut distinction between fine-leaved fescues (subg. Festuca) and broad-leaved fescues (subg. Schedonorus), which include the ryegrasses. 2) among the broad-leaved fescues, meadow fescue and tall fescue are very closely related, which may indicate that they share a common maternal …
Breeding Reed Canarygrass As An Energy Or Fibre Crop By Using Local Collected Wild Populations,
2024
Svalöf Weibull, UMEA, Sweden
Breeding Reed Canarygrass As An Energy Or Fibre Crop By Using Local Collected Wild Populations, E Lindvall
IGC Proceedings (1977-2023)
Reed canarygrass (Phalaris arundinacea L.) has become interesting as an industrial crop in Sweden. The grass can be used as biofuel or fibre raw material for pulp production. New varieties have to be developed, with a quality different from forage varieties. High stem/ leaf-ratio, low content of ash and elements like silica, potassium and chlorine are important breeding goals. A Swedish project, aiming to evaluate local reed canarygrass populations, shows that there is some variation in these morphological and chemical characters which can be utilised in a breeding program.
Compared Productivity Of Local Ecotypes And Selected Cultivars Of Perennial Ryegrass (Lolium Perenne) In High Belgium,
2024
Centre de Recherches Agronomiques de Gembloux, Belgium
Compared Productivity Of Local Ecotypes And Selected Cultivars Of Perennial Ryegrass (Lolium Perenne) In High Belgium, P Limbourg, Ph Lecomte
IGC Proceedings (1977-2023)
The objective of the trials was to compare the productivity of local ecotypes of perennial ryegrass (Lolium perenne) issued from old permanent pastures of High Belgium to that of adapted cultivars. During 3 consecutive years 2 local ecotypes were compared, in pure seedling at 2 different levels of nitrogenous manure, to 2 cultivars frequently used in seed mixtures for pastures. Results obtained using a cutting cycle wich simulated grazing did not reveal significant differences in terms of forage production or feeding value. These results explain the weak increase in forage production recorded in pastures renovated by reseeding as …
Salix Babylonica, A Traditional Fodder With Promising Potential,
2024
RNR Research Center, Ministry of Agriculture, Bhutan
Salix Babylonica, A Traditional Fodder With Promising Potential, K Wangdi, W Roder, P Thinlay
IGC Proceedings (1977-2023)
In Bhutan, tree fodders are important for ruminant nutrition, especially during the dry winter season. Salix babylonica is the preferred species for temperate regions. Farmers above 2000 m plant it widely for fodder, fuel, and fencing. Lack of fodder availability during the dry season, and competition with other crops are its main disadvantages. Crude protein content of S. babylonica leaves declined from 25% in May to 11% in October. Voluntary intake was 78 and 85 g dry matter/W0.75 and live weight gain 330 and 64 g day-1 for growing bulls and sheep, respectively. Dry matter disappearance after 48 hours of …
Purification Of Eutrophic Hydro-Environments And The Utilization For New Biomass Forage Resources By Aquatic Plants In Asia,
2024
Faculty of Agriculture, Kyushu Tokai University, Japan
Purification Of Eutrophic Hydro-Environments And The Utilization For New Biomass Forage Resources By Aquatic Plants In Asia, K Kabata, C Okamoto, B Montien-Art, T Nakazono, T Odahara, M Kikuchi
IGC Proceedings (1977-2023)
Water pollution, especially eutrophication, has become a serious world-wide problem in recent years. On the other hand, forage is in short supply during the dry season in Asia (especially in Southeast Asia). The purpose of this paper is to describe the development of new forage resources from among aquatic plants. In conclusion, it is suggested that three emergent plants (Zizania latifolia Turcz., Pontederia cordata L., Paspalum distichum L.) are useful as new forage species because of their absorptive ability for nitrogen and phosphorus from eutrophic water and their superior feeding value following ensiling.
Ecogeographic Assessment Of Mediterranean Environments For Targeting Legume Collections,
2024
Centre for Legumes in Mediterranean Agriculture (CLIMA), University of Western Australia, Australia
Ecogeographic Assessment Of Mediterranean Environments For Targeting Legume Collections, S J. Bennett
IGC Proceedings (1977-2023)
The mediterranean area is the centre of diversity for many of the legume species of agricultural importance and their wild relatives. Ecogeographical assessments are a method of determining the areas within the mediterranean that are homologous with a particular area within southern Australia. Using Geographical Information Systems the distribution of legume species are mapped and related to other climatic and edaphic factors. Using this data it is possible to show which areas of the mediterranean have been well collected and where the edaphic requirements of a species can be found and therefore where to collect it. The detail of an …
Genetic Diversity As Affected By Selection Methodology In Native Grass Species,
2024
University of Manitoba
Genetic Diversity As Affected By Selection Methodology In Native Grass Species, A T. Phan, S R. Smith
IGC Proceedings (1977-2023)
The utilization of native grasses for widespread plantings is limited by availability and cost of adapted seed sources. The objectives of this study were to assess the genetic diversity of locally collected blue grama (Bouteloua gracilis) and little bluestem (Schyzachyrium scoparium) populations and to examine potential shifts in genetic diversity using two selection methodologies. The ecovar method involved selection of the 20% highest seed yielding genotypes with equal representation from all populations while the ‘cultivar’ method involved selecting the highest 5% based on overall rank. Phenotypic variability was observed for morphological and reproductive traits between collected …
Physiological And Chemical Characteristics Of Five Cultivars Of Cynodon,
2024
UNESP-FCAV, Brazil
Physiological And Chemical Characteristics Of Five Cultivars Of Cynodon, C C.C. Gomide, L.R. De A. Rodrigues, T.De J.D. Rodrigues, R A. Reis, D A. Banzatto
IGC Proceedings (1977-2023)
The experiment was carried out at UNESP, Brazil, to evaluate five Cynodon cultivars: (Cynodon nlemfuensis Vanderyst cv “Tifton 68”, Cynodon spp. cv “Tifton 85”, Cynodon dactylon cv “Florakirk”, Cynodon nlemfuensis Vanderyst var. nlemfuensis cv “Florico” e Cynodon nlemfuensis Vanderyst var. nlemfuensis cv “Florona”). Plants were sampled once a week from 14 to 84 days of growth to study physiological characteristics and at 14-day intervals to study chemical characteristics. The following variables were studied: DM production, leaf/stem ratio, leaf weight/total dry matter ratio, relative growth rate, chlorophyll contents, leaf area, specific leaf area, LAI, and the contents of CP, NDF, …
Pasture Yield And Animal Performance From Aeschynomene Americana Cultivars Glenn And Lee,
2024
Department of Primary Industries, Queensland
Pasture Yield And Animal Performance From Aeschynomene Americana Cultivars Glenn And Lee, H G. Bishop, T B. Hilder, J J. Bushell
IGC Proceedings (1977-2023)
An on farm demonstration site was used to promote and compare the performance of the tropical legumes Glenn American jointvetch and Lee American jointvetch (Aeschynomene americana). Both legumes are widely sown in tropical Australia and are being increasingly sown in South-East Asian pasture projects. Glenn and Lee both grew well and persisted in grass/legume pastures over a 5 year period. Liveweight gain of steers, at a stocking rate of 1.5/ha, slightly favoured the Glenn pasture and gains of 0.49 kg/day for a 595 day period were achieved. Soil seed reserves were much higher under the annual Glenn than …
Diversity And Sustainability Of The Pek Savannas Of The Lao Pdr,
2024
Asian Institute of Technology
Diversity And Sustainability Of The Pek Savannas Of The Lao Pdr, V Phengvichith, J B. Hacker
IGC Proceedings (1977-2023)
The pek savannas of the Lao PDR occur in the southern half of the country and are relatively undeveloped. They are disjunct upland communities characterised by an understorey dominated by three species of Arundinaria, known locally as pek. The canopy varies from open forest to woodland. In relatively undisturbed communities, pek grows to c. 1.5 m tall, and is generally 99% pure, with tall growing grasses occurring infrequently. Higher levels of disturbance lead to invasion of shrub species and ingress of some lower-growing grasses and occasional legumes, some of which are palatable to livestock. Pek is palatable to livestock …
Research Programme To Improve The Utilization Of Home-Grown Forages In The Netherlands,
2024
ID-DLO, Lelystad
Research Programme To Improve The Utilization Of Home-Grown Forages In The Netherlands, A.M. Van Vuuren, A H. Bosma, G J. Kaspers, J.J. M.H. Ketelaars, E.N. Van Loo, H J.P. Marvin, H Valk, G.W.J. Van De Ven
IGC Proceedings (1977-2023)
In The Netherlands a research programme has been initiated by the Ministry of Agriculture, Nature Management and Fisheries to increase the proportion of high-quality home-grown forage in rations for dairy cows. This should result in a more sustainable dairy husbandry by improving the efficiency of utilization of nitrogen and phosphorus from home-grown forages (mainly grass and maize) on farm level. Research disciplines involved are plant breeding, forage harvesting and conservation and nutrition.
The European Ryegrass Core Collection: A Tool To Improve The Use Of Genetic Resources,
2024
Institute of Grassland and Environmental Research, Plas Gogerddan, United Kingdom
The European Ryegrass Core Collection: A Tool To Improve The Use Of Genetic Resources, N R. Sackville Hamilton, I D. Thomas, P Marum, L Ostrem, M Sevcíková, E Willner, F Balfourier, B Boller, V F. Chapurin, V Connolly, G Dologa, H Fritzen, T Van Hintum, L Horváth, W Majtkowski, V Negri, A Oliveira Prendes, D Reheul, D Shamov1, T Vaitsis
IGC Proceedings (1977-2023)
A core collection of 162 populations of ryegrass (Lolium perenne) native to 18 European countries, is being evaluated across Europe in a multi-country trial. Each participating country contributed the lesser of 10% or 25 accessions from its collection of native populations. The accessions are being grown at 18 sites in 17 countries. Quick, cheap protocols were developed for evaluation. Preliminary results are presented for performance during the first winter. Populations of northern origin showed uniformly low winter damage and low winter growth at all evaluation sites. Populations of Mediterranean origin were more affected by the environment used for …
Differences Between Adapted Populations Of Dactylis Glomerata L. In Argentina,
2024
Instituto Nacional de Tecnologia Agropecuaria, Argentina
Differences Between Adapted Populations Of Dactylis Glomerata L. In Argentina, A Andres, M Barufaldi
IGC Proceedings (1977-2023)
Nine adapted populations of orchardgrass (Dactylis glomerata L.) were collected from different grassland environments of Buenos Aires Province, Argentina, in order to investigate genetic differences between and within populations. Fifty plants per population were clonally propagated and transplanted as spaced-plant trial in a randomized design with three replicates. The results indicated large differences between and within populations for most attributes measured. Attributes related with the expression of foliar diseases and seed yield had the highest broad-sense heritability values. The results suggest that the genetic variation found in the adapted populations of orchardgrass has been mainly determined by the environmental …
