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Articles 2761 - 2790 of 12002

Full-Text Articles in Physical Sciences and Mathematics

Discovery, Isolation And Characterisation Of Promoters In White Clover (Trifolium Repens), C. M. Labandera, Y. H. Lin, E. Ludlow, M. Emmerling, U. John, P. W. Sale, C. Pallaghy, G. C. Spangenberg Mar 2023

Discovery, Isolation And Characterisation Of Promoters In White Clover (Trifolium Repens), C. M. Labandera, Y. H. Lin, E. Ludlow, M. Emmerling, U. John, P. W. Sale, C. Pallaghy, G. C. Spangenberg

IGC Proceedings (1993-2023)

The availability of a suite of promoters with a range of spatial, temporal and inducible expression patterns is of significant importance to control targeted expression of genes for molecular breeding in forage species. A range of resources and tools have been developed for promoter isolation and characterisation in white clover (Trifolium repens L.), including a comprehensive BAC library and a 15K unigene microarray.

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Novel Genotypes Of The Subtropical Grass Eragrostis Curvula For The Analysis Of Apomixis (Diplospory), S. Cardone, P. Polci, J. P. Selva, M. Mecchia, S. C. Pessino, P. Voigt, G. C. Spangenberg, V. Echenique Mar 2023

Novel Genotypes Of The Subtropical Grass Eragrostis Curvula For The Analysis Of Apomixis (Diplospory), S. Cardone, P. Polci, J. P. Selva, M. Mecchia, S. C. Pessino, P. Voigt, G. C. Spangenberg, V. Echenique

IGC Proceedings (1993-2023)

Eragrostis curvula (Schrad.) Nees is a variable grass native to Southern Africa. Its several forms, known as lovegrasses, were introduced to Australia, USA and Argentina as forage perennial grasses. Apomixis is a common trait in the genus Eragrostis, with diplospory being the most frequent type. Sexual reproduction also occurs in Eragrostis, although not frequently. Since most tetraploid Eragrostis lines are apomictic, the generation of a sexual tetraploid strain is a requirement for linkage analysis of the gene(s) governing the apomictic character. Furthermore, isogenic lines of the same ploidy, reproducing alternatively by sexuality or apomixes, represent an ideal system …

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Isolation And Characterisation Of Genes Encoding Malate Synthesis And Transport Determinants In The Aluminum-Tolerant Australian Weeping-Grass (Microlaena Stipoides), R. M. Polotnianka, E. Ribarev, L. Mackin, K. A. Sivakumaran, G. D. Nugent, U. P. John, G. C. Spangenberg Mar 2023

Isolation And Characterisation Of Genes Encoding Malate Synthesis And Transport Determinants In The Aluminum-Tolerant Australian Weeping-Grass (Microlaena Stipoides), R. M. Polotnianka, E. Ribarev, L. Mackin, K. A. Sivakumaran, G. D. Nugent, U. P. John, G. C. Spangenberg

IGC Proceedings (1993-2023)

Acid soils cover some 40% of the Earth’s arable land where they represent a major limitation to plant production. Plant growth on acid soils is primarily limited due to aluminium (Al) solubilized by acidity into toxic Al3+ cations which will inhibit root growth resulting in poor uptake of water and nutrients. Many important pasture species lack sufficient Al tolerance within their germplasm to allow effective breeding for this character.

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Development And Use Of A Tool For Automated Alignments Of Genes In The Rice Bac's Genbank Card Against Other Species, P. Barre, G. Darrieutort, J. Auzanneau, B. Julier Mar 2023

Development And Use Of A Tool For Automated Alignments Of Genes In The Rice Bac's Genbank Card Against Other Species, P. Barre, G. Darrieutort, J. Auzanneau, B. Julier

IGC Proceedings (1993-2023)

In many cases, the analysis of the genetic bases of any trait requires molecular markers and if possible co-dominant PCR-based ones. In perennial fodder species, the number of publicly available markers (microsatellites and Sequence Tagged Site (STS)) is limited. Our goal is to use sequences from model grass species, i.e. rice, wheat, maize, barley, in L. perenne in order to develop STS markers in interesting regions such as under a QTL (Quantitative Trait Loci) or around a candidate gene,. As the genome sequence of rice is now available, the objective was to use the sequences of genes included in the …

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Application Of Molecular Markers Derived From Medicago Truncatula In White Clover (Trifolium Repens L.), C. Jones, M. T. Abberton Mar 2023

Application Of Molecular Markers Derived From Medicago Truncatula In White Clover (Trifolium Repens L.), C. Jones, M. T. Abberton

IGC Proceedings (1993-2023)

White clover is the major forage legume of temperate areas. Genome maps have been produced recently (Jones et al., 2003; Barrett et al., 2004) and the location of QTL for important agricultural traits reported (Abberton et al., 2004). White clover is closely related to the model legume Medicago truncatula and there is likely to be considerable benefit in applying genomic resources from model to crop. However, the extent of synteny between the species must be established. Here we present preliminary results detailing progress towards this goal.

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Screening Of Perennial Grasses And A Mutant Maize Collection By Fourier-Transformed Infrared (Ftir) Spectroscopy For Improved Biofuel Traits, S. C. Thain, P. Morris, S. Hawkins, C. Morris, I. S. Donnison Mar 2023

Screening Of Perennial Grasses And A Mutant Maize Collection By Fourier-Transformed Infrared (Ftir) Spectroscopy For Improved Biofuel Traits, S. C. Thain, P. Morris, S. Hawkins, C. Morris, I. S. Donnison

IGC Proceedings (1993-2023)

Currently the potential of biomass crops, including grasses, is limited because most species have not been bred for this purpose. However traits such as lignification, phenolic cross-linking and carbohydrate accessibility, which are also important for nutritive quality in forage grasses, can affect potential biofuel quality in applications such as combustion, fast-pyrolysis or fermentation. A collection of Lolium and Festuca species known to exhibit a range of lignin, cell wall phenolic and carbohydrate concentrations have been used to test optimum characteristics for biofuel processing. This collection formed a “calibration” set for subsequent high through-put FTIR chemical screening of additional plant lines: …

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A Proposal For An International Transcriptome Initiative For Forage And Turf: Microarray Tools For Expression Profiling In Ryegrass, Clover And Grass Endophytes, T. Webster, N. Nguyen, C. Rhodes, S. A. Felitti, R. Chapman, D. Edwards, G. C. Spangenberg Mar 2023

A Proposal For An International Transcriptome Initiative For Forage And Turf: Microarray Tools For Expression Profiling In Ryegrass, Clover And Grass Endophytes, T. Webster, N. Nguyen, C. Rhodes, S. A. Felitti, R. Chapman, D. Edwards, G. C. Spangenberg

IGC Proceedings (1993-2023)

Knowledge of the expression pattern of genes provides a valuable insight into gene function and role in determining the observed heritable phenotype. High–density cDNA and oligonucleotide microarrays represent powerful tools for transcriptome analysis to gain an understanding of gene expression patterns for thousands of genes. Internationally coordinated efforts in transcriptome analyses and sharing of microarray resources will benefit the advancement of our understanding of gene function in forage and turf species.

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Screening Genes For Association With Loci For Nitrogen-Use Efficiency In Perennial Ryegrass By PyrosequencingTm, O. Dolstra, D. Dees, J. -D. Driesprong, E. N. Van Loo Mar 2023

Screening Genes For Association With Loci For Nitrogen-Use Efficiency In Perennial Ryegrass By PyrosequencingTm, O. Dolstra, D. Dees, J. -D. Driesprong, E. N. Van Loo

IGC Proceedings (1993-2023)

The application of marker-assisted selection to improve quantitative traits in perennial ryegrass (Lolium perenne) is cumbersome. It requires a priori knowledge on the association of markers and genes. The knowledge on the chromosomal location of major genes for quantitative traits as well as on gene sequences is rapidly growing. However, determination of the genetic constitution of parents prior to their use in breeding still is impractical. More realistic is to collect association data along with the testing activities needed for breeding new varieties. This study uses changes in allele frequency due to selection as a criterion for gene-trait …

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Gene-Associated Single Nucleotide Polymorphism (Snp) Discovery In Perennial Ryegrass (Lolium Perenne L.), J. W. Forster, N. O. I. Cogan, A. C. Vecchies, R. C. Ponting, M. C. Drayton, J. George, J. L. Dumsday, G. C. Spangenberg, K. F. Smith Mar 2023

Gene-Associated Single Nucleotide Polymorphism (Snp) Discovery In Perennial Ryegrass (Lolium Perenne L.), J. W. Forster, N. O. I. Cogan, A. C. Vecchies, R. C. Ponting, M. C. Drayton, J. George, J. L. Dumsday, G. C. Spangenberg, K. F. Smith

IGC Proceedings (1993-2023)

Perennial ryegrass (Lolium perenne L.) is the most important grass species for temperate pasture systems world-wide. Varietal improvement programs for this obligate outbreeding species are based on polycrossing of multiple parents to produce heterogeneous synthetic populations. The complexity of breeding systems creates challenges and opportunities for molecular marker technology development and implementation. Previous research has led to: the generation of a comprehensive suite of simple sequence repeat (SSR) markers, reference genetic map construction, comparative genetic studies, QTL identification, and population structure analysis. Emphasis has now shifted from the use of anonymous genetic markers linked to trait-specific genes to the …

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Isolation Of Candidate Genes Involved In Cold Temperatures Response In Festuca Pratensis Huds., Using Suppression Subtractive Hybridisation And Microarray Approaches, H. Rudi, V. Alm, L. Opseth, A. Larsen, O. A. Rognli Mar 2023

Isolation Of Candidate Genes Involved In Cold Temperatures Response In Festuca Pratensis Huds., Using Suppression Subtractive Hybridisation And Microarray Approaches, H. Rudi, V. Alm, L. Opseth, A. Larsen, O. A. Rognli

IGC Proceedings (1993-2023)

The objective of this work was to isolate candidate genes which are differentially expressed following cold-acclimation and develop SNPs to test for associations between candidate genes and frost tolerance. The ability to develop sufficient levels of tolerance against freezing temperatures through cold-acclimation (hardening) is crucial for survival of grasses and winter cereals in temperate climate. Meadow fescue (Festauca pratensis Huds.) is one of the most important forage grass species in Northern Europe. The preference of Festuca instead of Lolium in Norway is due to its superior combination of winter hardiness and forage quality.

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Ryegrass Astra: A Web-Based Resource For Lolium Est Analysis, G. C. Spangenberg, T. Sawbridge, E. K. Ong, C. G. Love, T. A. Erwin, E. G. Logan, D. Edwards Mar 2023

Ryegrass Astra: A Web-Based Resource For Lolium Est Analysis, G. C. Spangenberg, T. Sawbridge, E. K. Ong, C. G. Love, T. A. Erwin, E. G. Logan, D. Edwards

IGC Proceedings (1993-2023)

Perennial ryegrass (Lolium perenne L.) is a major grass species of temperate pastoral agriculture.

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Positive Effect Of Increased Aflp Diversity Among Parental Plants On Yield Of Polycross Progenies In Perennial Ryegrass (Lolium Perenne L.), R. Kölliker, B. Boller, F. Widmer Mar 2023

Positive Effect Of Increased Aflp Diversity Among Parental Plants On Yield Of Polycross Progenies In Perennial Ryegrass (Lolium Perenne L.), R. Kölliker, B. Boller, F. Widmer

IGC Proceedings (1993-2023)

In outbreeding forage crops such as perennial ryegrass (Lolium perenne L.), genetic diversity among parental plants may greatly influence the success of a cultivar through mechanisms such as heterosis and inbreeding depression. The aim of this study was to evaluate the use of amplified fragment length polymorphism (AFLP) markers to select polycross parents with contrasting levels of genetic diversity and to analyse genetic diversity and agronomic performance of first and second generation synthetic progenies (Syn1, Syn2).

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Genomic Constitution Of Festulolium Varieties, D. Kopecky, V. Cernoch, R. Capka, J. Dolezel Mar 2023

Genomic Constitution Of Festulolium Varieties, D. Kopecky, V. Cernoch, R. Capka, J. Dolezel

IGC Proceedings (1993-2023)

Hybrids between species of ryegrass (Lolium) and fescue (Festuca) combine useful agronomical characteristics such as rapid establishment from seed and fodder quality from ryegrass and tolerance against abiotic and biotic stressses from fescue. The superior potential of hybrids has stimulated breeding programs generating so called Festulolium varieties. While the varieties have been evaluated extensively for their agronomic characteristics, little information is publicly available on their genomic constitution. The aim of our study was to analyse genomic constitution of a representative set of commercially available European Festulolium cultivars. To do this, we have employed genomic in situ …

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Development And Testing Of Novel Chloroplast Markers For Perennial Ryegrass From De Novo Sequencing And In Silico Sequences, S. Mcgrath, T. R. Hodkinson, S. Barth Mar 2023

Development And Testing Of Novel Chloroplast Markers For Perennial Ryegrass From De Novo Sequencing And In Silico Sequences, S. Mcgrath, T. R. Hodkinson, S. Barth

IGC Proceedings (1993-2023)

Chloroplast DNA is uniparentally inherited and non-recombinant in Lolium perenne. These properties make the chloroplast genome a useful tool for studying inter- and intra- specific relationships. Previous genetic studies on L. perenne have used chloroplast sequence data. However, the relative lack of variation in the chloroplast genome limits its usefulness for analysis at the single individual level within a species. However, chloroplast SSR markers have recently been shown to have high levels of polymorphism (Provan et al., 2004). This is the first study to design and employ such markers for L. perenne. The objectives of this study …

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Genetic Changes Over Breeding Generations Of Festulolium, M. Ghesquière, P. Barre, L. Barrot Mar 2023

Genetic Changes Over Breeding Generations Of Festulolium, M. Ghesquière, P. Barre, L. Barrot

IGC Proceedings (1993-2023)

Festulolium hybrids are a valuable breeding source for tolerance to abiotic stress and to make grass more persistent under drought and in cold environments. In 2004, the EU Commission enlarged the definition of Festulolium which may now include all hybrids between Lolium sp. and Festuca sp. and not only those between L. multiflorum and F. pratensis. We here report allele frequencies at two unlinked PCR-based marker loci in populations derived from tetraploid (2n=4x=28) L. multiflorum x F. glaucescens hybrids where breeding history enables us to test the effects of selection vs that of genetic drift.

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Genetic Analysis Of The Interaction Between Perennial Ryegrass And The Fungal Endophyte Neotyphodium Lolii, E. Van Zijll De Jong, A. C. Vecchies, M. P. Dobrowolski, N. O. I. Cogan, K. F. Smith, G. C. Spangenberg, J. W. Forster Mar 2023

Genetic Analysis Of The Interaction Between Perennial Ryegrass And The Fungal Endophyte Neotyphodium Lolii, E. Van Zijll De Jong, A. C. Vecchies, M. P. Dobrowolski, N. O. I. Cogan, K. F. Smith, G. C. Spangenberg, J. W. Forster

IGC Proceedings (1993-2023)

The fungal endophyte Neotyphodium lolii is widely distributed in perennial ryegrass pastures, especially in Australia and New Zealand. The presence of the endophyte is associated with improved tolerance to water and nutrient stress and resistance to insect pests, but is accompanied by reduced herbivore feeding. The molecular mechanisms responsible for these endophyte-related traits are in general poorly understood. Comparisons of different grass-endophyte associations show that endophyte-related traits are affected by both endophyte and host genotype, and environmental interactions.

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Microarray-Based Transcriptome Analysis Of The Interaction Between Perrenial Ryegrass (Lolium Perenne) And The Fungal Endophyte Neotyphodium Lolii, S. Felitti, P. Tian, T. Webster, D. Edwards, G. C. Spangenberg Mar 2023

Microarray-Based Transcriptome Analysis Of The Interaction Between Perrenial Ryegrass (Lolium Perenne) And The Fungal Endophyte Neotyphodium Lolii, S. Felitti, P. Tian, T. Webster, D. Edwards, G. C. Spangenberg

IGC Proceedings (1993-2023)

Neotyphodium lolii, Neotyphodium coenophialum and Epichloë festucae are common symbiotic fungal endophytes of the temperate pasture grasses perennial ryegrass (Lolium perenne), tall fescue (Festuca arundinacea) and red fescue (Festuca rubra), respectively. A genomic resource of 13,964 expressed sequence tags (ESTs), representing 7,585 unique endophyte genes, has been established for Neotyphodium and Epichloë fungal endophytes.

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A High-Throughput Gene Silencing Approach For Studying The Interaction Between Perennial Ryegrass (Lolium Perenne) And The Fungal Endophyte Neotyphodium Lolii, S. Felitti, P. Tian, D. Edwards, G. C. Spangenberg Mar 2023

A High-Throughput Gene Silencing Approach For Studying The Interaction Between Perennial Ryegrass (Lolium Perenne) And The Fungal Endophyte Neotyphodium Lolii, S. Felitti, P. Tian, D. Edwards, G. C. Spangenberg

IGC Proceedings (1993-2023)

Perennial ryegrass (Lolium perenne L.) and its fungal endophyte (Neotyphodium lolii) are known to establish a mutualistic association that impacts on the agronomic productivity of endophyte-infected ryegrass pastures. To study this interaction at the molecular level, a genomic resource consisting of 13,964 endophyte ESTs has been generated. However, the functions of a large proportion of these genes remain to be elucidated. Recent work has demonstrated the potential for RNA-mediated gene silencing to suppress gene expression in a sequence specific manner thus allowing for the subsequent analysis of gene function.

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Isolation And Characterization Of Novel Btb Domain Protein Encoding Genes From Fungal Grass Endophytes, M. Ramsperger, S. A. Felitti, D. Edwards, G. C. Spangenberg Mar 2023

Isolation And Characterization Of Novel Btb Domain Protein Encoding Genes From Fungal Grass Endophytes, M. Ramsperger, S. A. Felitti, D. Edwards, G. C. Spangenberg

IGC Proceedings (1993-2023)

Pasture grasses belonging to the Pooideae sub-family of the Poaceae family frequently host symbiotic fungal endophytes. These include the sexual Epichloë species and the anamorphic asexual Neotyphodium species, which are thought to have evolved from Epichloë species either by the direct loss of sexual reproduction or by interspecific hybridisation. The two key temperate pasture grasses, tall fescue (Festuca arundinacea Schreb) and perennial ryegrass (Lolium perenne L.) interact with the fungal endophytes N. coenophialum and N. lolii, respectively. Large insert genomic DNA libraries are valuable resources for the discovery and isolation of genes and their regulatory sequences, for …

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Genetic Variation In The Perennial Ryegrass Fungal Endophyte Neotyphodium Lolii, E. Van Zijll De Jong, N. R. Bannan, A. V. Stewart, K. F. M. Reed, M. P. Dobrowolski, K. F. Smith, G. C. Spangenberg, J. W. Forster Mar 2023

Genetic Variation In The Perennial Ryegrass Fungal Endophyte Neotyphodium Lolii, E. Van Zijll De Jong, N. R. Bannan, A. V. Stewart, K. F. M. Reed, M. P. Dobrowolski, K. F. Smith, G. C. Spangenberg, J. W. Forster

IGC Proceedings (1993-2023)

The common fungal endophytes (Neotyphodium species) of temperate pasture grasses are associated with improved tolerance to water and nutrient stress and resistance to insect pests, but are also the causal agents of animal toxicoses. Considerable variation exists among grass-endophyte associations for these beneficial and detrimental agronomic traits. The extent to which this variation may be attributed to the endophyte genotype, the host genotype or environmental interactions is currently unknown. The development of molecular genetic markers for endophytes based on simple sequence repeat (SSR) loci and the demonstration of the specific detection of endophytes in planta with these markers (van …

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Metabolome Analysis Of The Interaction Between Perennial Ryegrass (Lolium Perenne) And The Fungal Endophyte Neotyphodium Lolii, P. Tian, S. Felitti, M. P. Dobrowolski, K. F. Smith, D. Edwards, R. Hall, J. Kopka, G. C. Spangenberg Mar 2023

Metabolome Analysis Of The Interaction Between Perennial Ryegrass (Lolium Perenne) And The Fungal Endophyte Neotyphodium Lolii, P. Tian, S. Felitti, M. P. Dobrowolski, K. F. Smith, D. Edwards, R. Hall, J. Kopka, G. C. Spangenberg

IGC Proceedings (1993-2023)

Perennial ryegrass (Lolium perenne L.) and tall fescue (Festuca arundinacea Schreb.) frequently contain endophytic fungi (Neotyphodium lolii in perennial ryegrass and N. coenophialum in tall fescue). The presence of the endophyte has been shown to improve seedling vigour, persistence and drought tolerance in marginal environments as well as provide protection against some insect pests. Endophyte-infected grasses also produce a wide range of metabolites, including ergopeptine alkaloids, indole-isoprenoid lolitrems, pyrrolizidine alkaloids, and pyrrolopyrazine alkaloids. In contrast to information on alkaloids and animal toxicosis, the beneficial physiological aspects of the endophyte/grass interactions have not been well characterised. The physiological …

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Endophyte Effects On Antioxidants And Membrane Leakage In Tall Fescue During Drought, C. P. West, R. D. Carson, C. A. Guerber, B. De Los Reyes Mar 2023

Endophyte Effects On Antioxidants And Membrane Leakage In Tall Fescue During Drought, C. P. West, R. D. Carson, C. A. Guerber, B. De Los Reyes

IGC Proceedings (1993-2023)

Tall fescue [Festuca arundinacea (Schreb.)=Lolium arundinaceum (Schreb.) S.J. Darbyshire] infected (E+) by its fungal endophyte [(Neotyphodium coenphialum Morgan-Jones & Gams.) Glenn, Bacon & Hanlin] often shows greater persistence during summer drought than endophyte-free (E-) plants (Malinowski et al., 2005). Survival of the apical meristem and growing zone of vegetative tillers likely involves biochemical adaptations whose benefits to the host are enhanced by endophyte presence. Antioxidant enzymes may scavenge free radicals during heat and drought, and thereby reduce membrane damage. Their roles in endophyte-mediated drought tolerance in tall fescue have not been tested. Our objective was to …

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Nutritive Value Of Alopecurus Pratensis, Festuca Rubra, Arrhenatherum Elatius And Lolium Perenne Grown In The South Of Belgium, A. Nivyobizi, A. G. Deswysen, D. Dehareng, A. Peeters, Y. Larondelle Mar 2023

Nutritive Value Of Alopecurus Pratensis, Festuca Rubra, Arrhenatherum Elatius And Lolium Perenne Grown In The South Of Belgium, A. Nivyobizi, A. G. Deswysen, D. Dehareng, A. Peeters, Y. Larondelle

IGC Proceedings (1993-2023)

In Europe, recent strategies have aimed at encouraging farmers to use production techniques more efficient in preserving the environment and maintaining natural areas. Those strategies have encouraged the use of secondary grass species in forage production systems. However, the nutritive value of those grasses is not well known. Therefore, the aim of the present study was to evaluate the energy and nitrogen values of Alopecurus pratensis (ALPR), Festuca rubra (FERU) and Arrhenatherum elatius (AREL) under moderate rates of nitrogen (N) application (60 kg N/ha per cut) and a hay-cutting regime (2 cuts/year: 25 May and 9 July). Lolium perenne cv. …

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The Influence Of Management On Health Status Of Festuca Rubra In Mountain Meadows, B. Voženílková, F. Klimeš, J. Květ, Z. Mašková, B. Čermák, K. Suchý Mar 2023

The Influence Of Management On Health Status Of Festuca Rubra In Mountain Meadows, B. Voženílková, F. Klimeš, J. Květ, Z. Mašková, B. Čermák, K. Suchý

IGC Proceedings (1993-2023)

Snijders & Winkelhorst (1996) investigated swards in West Europe and showed that it was not the snow mould (Microdochium nivale) but other species of the genus Fusarium (F. cerealis (Cooke) Sacc., F. graminearum Schwabe, F. culmorum (Wm. G. Sm.) Sacc. and F. acuminatum Ellis & Everh.) that caused serious damage to grasslands where Lolium perenne L. and Festuca rubra L. were dominant components. In this study the spread and harmfulness of pathogeneous fungi involved in damage to and death of some species (Festuca rubra L., Holcus mollis L.) in grass swards was examined.

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Increasing The Productive Potential Of Permanent Grasslands From The Forest Steppe Area Of Romania, V. Vintu, C. Samuil, T. Iacob, St. Postolache Mar 2023

Increasing The Productive Potential Of Permanent Grasslands From The Forest Steppe Area Of Romania, V. Vintu, C. Samuil, T. Iacob, St. Postolache

IGC Proceedings (1993-2023)

In Romania permanent grasslands represent 32 % of the total agricultural area, stretching over 4,872 million hectares, out of which 340,000 ha are located in the forest steppe area, on less productive soils, which explains their inadequate botanical composition and low quality and yields (Vintu, 2003). One of the main measures taken to increase the productivity of grasslands is through fertilisation (Birch, 1999). This paper presents the results obtained during 2000-2004 on the effect of organic fertiliser on degraded grasslands made up of Festuca valesiaca L.

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The Influence Of Harvest Period And Fertilisation On The Yield Of Some Mixed Grass And Leguminous Species Under The Forest Steppe Conditions Of North-East Romania, V. Vintu, C. Samuil, T. Iacob, St. Postolache Mar 2023

The Influence Of Harvest Period And Fertilisation On The Yield Of Some Mixed Grass And Leguminous Species Under The Forest Steppe Conditions Of North-East Romania, V. Vintu, C. Samuil, T. Iacob, St. Postolache

IGC Proceedings (1993-2023)

In the forest steppe area of North-east Romania, temporary grasslands represent an important source of high quality fodder but they have a short period of exploitation, associated with some changes in the floristic composition (Vintu, 2003). Fertiliser application and harvest period have an important role in maintaining high productivity (Hopkins, 1991). The aim of this paper is to determine the influence of harvest period and fertilization on the yield of some grass and leguminous species in the forest steppe conditions of North-east Romania.

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Productivity Of Sahiwal And Friesian–Sahiwal Crossbreds In Marginal Grasslands Of Kenya, W. B. Muhuyi, F. B. Lukibisi, S. N. Ole Sinkeet Mar 2023

Productivity Of Sahiwal And Friesian–Sahiwal Crossbreds In Marginal Grasslands Of Kenya, W. B. Muhuyi, F. B. Lukibisi, S. N. Ole Sinkeet

IGC Proceedings (1993-2023)

Dual-purpose cattle can be used to exploit the production potential of semi-arid grasslands of Kenya for milk and meat production. Although the Sahiwal is adapted to these grasslands, its productivity is low. In order to increase milk and meat productivity, the Sahiwal has been crossed with the Friesian to produce Friesian-Sahiwal crossbreds (McDowell et al., 1996) adapted to the tropical environment. The objective of this study was to evaluate the productivity of Sahiwal and Friesian-Sahiwal crossbreds.

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Yield And Mineral Concentration Changes In Maize And Italian Ryegrass Cropping Systems, Sachiko Idota, Yasuyuki Ishii Mar 2023

Yield And Mineral Concentration Changes In Maize And Italian Ryegrass Cropping Systems, Sachiko Idota, Yasuyuki Ishii

IGC Proceedings (1993-2023)

Mineral balance between plants and soil to which fertilizer has been applied is important in sustainable agriculture. Cropping systems are chosen based on considerations of crop yield, soil physical and chemical properties and climatic conditions. Thus, the sustainability of a forage cropping system should only be assessed after continuous cultivation has been practiced for several years. Forage crop production is employed in the rice paddies of Japan during summer. Thus, the objective of this study was to evaluate the yield and mineral concentration of forage crops cultivated in hard-textured soils for 4 years.

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Pollen-Mediated Gene Flow From Genetically Modified Herbicide Resistant Creeping Bentgrass, L. S. Watrud, E. H. Lee, A. Fairbrother, C. Burdick, J. R. Reichman, M. Bollman, M. Storm, G. King, P. K. Van De Water Mar 2023

Pollen-Mediated Gene Flow From Genetically Modified Herbicide Resistant Creeping Bentgrass, L. S. Watrud, E. H. Lee, A. Fairbrother, C. Burdick, J. R. Reichman, M. Bollman, M. Storm, G. King, P. K. Van De Water

IGC Proceedings (1993-2023)

Approximately 162 ha of multiple experimental fields of creeping bentgrass (Agrostis stolonifera L.) genetically modified for resistance to Roundup ®herbicide, were planted in central Oregon in 2002. When the fields flowered for the first time in the summer of 2003, a unique opportunity was presented to evaluate methods to monitor potential pollen-mediated gene flow from the experimental GM crop fields to compatible sentinel and resident plants that were located in surrounding, primarily non-agronomic areas.

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Assessing The Risk Posed By Transgenic Virus-Resistant Trifolium Repens To Native Grasslands In Southeast Australia, R. C. Godfree, P. W. G. Chu, A. G. Young Mar 2023

Assessing The Risk Posed By Transgenic Virus-Resistant Trifolium Repens To Native Grasslands In Southeast Australia, R. C. Godfree, P. W. G. Chu, A. G. Young

IGC Proceedings (1993-2023)

In Australia, comprehensive environmental risk assessments must be performed on transgenic plants (GMOs) prior to their commercial release. A key element is the determination of whether the release of a particular GMO poses any weediness threat to the environment or other agricultural systems, which can occur by means of direct invasion or by introgression of transgenes into wild populations of the same or closely related species. For transgenic pasture plants this question could be of added importance because many of these species have been selected for traits encouraging long-term persistence and competitiveness in complex plant communities (Godfree et al., …

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