Marike Trytsman

Marike Trytsman
Agricultural Research Council, South Africa | ARC · Animal Production Institute

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25
Publications
3,773
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73
Citations

Publications

Publications (25)
Poster
Full-text available
Woody plants are important sources of food for livestock and game in semi-arid to arid regions as well as a vital source of highly nutritious feed in many other parts of southern Africa. The SA-National Forage Genebank, mandated to collect and conserve valuable forage seed, initiated an inventory study of known indigenous fodder trees and shrubs. T...
Article
The ecological and economical importance of African grasses in sustaining animal production prompted studies to quantify the wealth of grass genetic resources indigenous to southern Africa. Plant collection and occurrence data were extracted from two southern African datasets, BODATSA and PHYTOBAS, and analysed to establish biogeographical patterns...
Poster
Full-text available
There is an urgent need for the prioritization and ex situ conservation of pasture grass species. Many pasture grasses are still in the process of domestication and grasslands in the tropical, subtropical, semi-arid and arid regions of the world are therefore a major source of genetic material for future forage improvement. Within South Africa, it...
Conference Paper
Full-text available
There is an urgent need for the prioritization and ex situ conservation of pasture grass species. Many pasture grasses are still in the process of domestication and grasslands in the tropical, subtropical, semi-arid and arid regions of the world are therefore a major source of genetic material for future forage improvement. Within South Africa, it...
Presentation
Full-text available
The selection of the most appropriate lucerne (Medicago sativa) cultivar is often complicated, but is the most important factor that will determine the production and persistence under specific agro-ecological conditions. In South Africa, only lucerne cultivars that are registered on the South African variety list may be sold, and the number of reg...
Presentation
Full-text available
Within South Africa, there is a lack of pasture species that are adapted to the water-limited agro-ecological areas of the country. Brachiaria grass, native to Africa, has recently been identified as highly productive forages, and has gained importance for its climate-smart qualities. Various Brachiaria grass hybrids are reputed to have a significa...
Article
Full-text available
A renewed interest in the present state of genebanks conserving pasture genetic resources worldwide motivated this study to quantify the wealth of grass (Poaceae) diversity indigenous to southern Africa, here defined as South Africa, Lesotho and Eswatini (previously Swaziland). Botanical occurrence records were extracted from BODATSA and PHYTOBAS d...
Poster
Full-text available
Calobota sericea is a perennial legume species from South Africa that has the potential to be implemented as a fodder crop in water-limited agro-ecosystems. Very little is currently known about how future climate change scenarios may influence the bioclimatic niche of C. sericea and how this, in turn, may influence its agronomic potential. In this...
Article
In contrast to the exploration and use of southern African grass plant genetic resources over the past century, only a few indigenous legume species are currently used as forages, notwithstanding the vast untapped legume diversity available in southern Africa. The aim of this study was to assess legumes, indigenous to South Africa, Lesotho and Swaz...
Poster
Full-text available
Recently, the ARC prioritized a number of native legume species for further evaluation as forage crops within water-limited agro-ecosystems. Within this selection, a number of Indigofera and Lessertia species were prioritized. Very little information regarding the climate adaptation of these species is currently available, and therefore, it is impo...
Poster
Full-text available
Medicago sativa (Lucerne) is a perennial legume species that is cultivated worldwide. It is arguably the most commonly used pasture and hay crop in South Africa due to its high palatability and high forage quality. Only Lucerne cultivars that is registered on the South African variety list may be sold in South Africa. There are approximately 46 dif...
Presentation
Full-text available
Phaseoleae is the largest tribe in the Leguminosae family, indigenous to southern Africa. It contains 22 genera, namely Alistilus, Bolusafra, Canavalia, Decorsea, Dipogon, Dolichos, Dumasia, Eriosema, Erythrina, Flemingia, Galactia, Lablab, Macrotyloma, Mucuna, Neonotonia, Neorautanenia, Ophrestia, Otoptera, Rhynchosia, Sphenostylis, Teramnus and V...
Poster
Full-text available
The genus Indigofera is being evaluated for possible pasture potential of certain species occurring within the genus. There are at least 196 Indigofera species indigenous to southern Africa. Distribution records show that species in the genus Indigofera occur primarily in the Savanna and Grassland Biomes. The majority of Indigofera species are herb...
Article
Full-text available
In the face of climate change, identification of forage species suitable for dryland farming under low rainfall conditions in South Africa is needed. Currently, there are only a limited number of forage species suitable for dryland farming under such conditions. The objective of this study was to identify and prioritise native legume species that c...
Article
Full-text available
The principal aim of this study was to establish biogeographical patterns in the legume flora of southern Africa so as to facilitate the selection of species with agricultural potential. Plant collection data from the National Herbarium, South Africa, were analysed to establish the diversity and areas covered by legumes (Leguminosae/Fabaceae) indig...
Data
The predominant mean annual rainfall and minimum and maximum temperatures expressed as a percentage for southern African leguminochoria.
Data
The predominant soil phosphorus content, pH level and exchangeable sodium percentage (ESP) expressed as a percentage for southern African leguminochoria.
Data
Statistical results of the clustering analysis using the Agglomerative Hierarchical Clustering method.
Data
Species recorded in each leguminochorion (A1–E) of southern Africa.
Conference Paper
Full-text available
A nodulation authentication test was conducted following the Koch's postulate experiment under glasshouse condition using rhizobial strains previously collected from economically important forage legumes. All the tested strains of rhizobia showed effectiveness in nodulating their respective legumes from which they were initially isolated with stati...
Article
Full-text available
Bacterial strains formerly isolated from the root nodules of indigenous and exotic forage legumes and preserved at the South African Rhizobium Culture Collection (SARCC) were tested for nodulation of their original host. The nodulation authentication trial was conducted following the Koch's postulate experiment under glasshouse condition and reveal...
Article
Full-text available
The diversity of legumes, indigenous to South Africa, Lesotho and Swaziland is reported using recorded descriptive and distribution data. A total of 24 tribes, 118 genera and 1662 species were documented with the majority of genera belonging to subfamily Faboideae, tribe Phaseoleae, and the majority of species to tribe Crotalarieae. In terms of dis...
Article
The polyfarm concept aims at strengthening traditional and appropriate farming technologies within the local agro-economic, cultural and socio-economic constraints of rural small farming. Different modules can be grouped together to suit the needs of the farmer. The polyfarm can serve as a demonstration and training facility to make rural farmers a...
Article
The productivity of Trifolium repens L. cv. Ladino, under irrigation in the subtropical region of Gauteng, South Africa, is unknown. The performance of T. repens was determined over five years (1981/1982 to 1985/1986), at two defoliation frequencies, four levels of nitrogen (0, 400, 800 and 1 600 kg N ha ‐ total applied over five years), and either...
Article
The N natural abundance and N dilution methods were used to determine the viability of using either Lolium multiflorum (annual ryegrass) or uninoculated Trifolium subterraneum (subterranean clover), as non‐fixing reference crops in N2‐fixation studies. The δN values for the N natural abundance method and atom% N values for the N dilution method for...

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Project (1)
Project
In the face of climate change, identification of forage species suitable for dryland farming under low-rainfall conditions in South Africa is needed. Using a combination of indigenous knowledge, ecological niche modeling techniques and plant functional traits, we aim to identify and prioritize native legume species that could be evaluated further as alternative forages to be used in dryland farming systems in water-limited agro-ecosystems in South Africa.