A5074146242- Agronomic Practices and Intercropping Systems
- Plant pathogens and resistance mechanisms
- Ruminant Nutrition and Digestive Physiology
- Legume Nitrogen Fixing Symbiosis
- Chromosomal and Genetic Variations
- Pasture and Agricultural Systems
- Plant tissue culture and regeneration
- Plant Disease Resistance and Genetics
- Agroforestry and silvopastoral systems
- Plant Taxonomy and Phylogenetics
- Soybean genetics and cultivation
- Seed Germination and Physiology
- Plant Reproductive Biology
- Plant Parasitism and Resistance
- Soil Carbon and Nitrogen Dynamics
- Genetics and Plant Breeding
- Plant and fungal interactions
- Plant nutrient uptake and metabolism
- Plant Pathogens and Resistance
- Turfgrass Adaptation and Management
- Agricultural pest management studies
- Botanical Research and Chemistry
- Wheat and Barley Genetics and Pathology
- Plant Pathogens and Fungal Diseases
- Rangeland and Wildlife Management
AgResearch
2011-2023
Massey University
2011-2022
Purdue University West Lafayette
2008
University of Kentucky
1990-1991
Palmerston North Hospital
1968-1990
Agriculture Victoria
1983-1985
University of Wisconsin–Madison
1984
Lincoln University
1984
Victoria University of Wellington
1968
Summary The variability in pH, loss‐on‐ignition, exchangeable cations, extractable phosphate, and soil moisture, has been studied for the 0.15 cm horizon of uncultivated, unfertilized Brown Earths at two upland grassland sites North Wales. results show that there is a high degree samples taken same time on circles 1 m radius all sampling locations. For example, coefficients variation cations (except sodium) average 33 per cent twenty‐two occasion three This spatial prevented detection any...
Anthocyanin pigments accumulate to form spatially restricted patterns in plants, particularly flowers, but also occur vegetative tissues. Spatially anthocyanin leaf markings are poorly characterised common forage legumes. We hypothesised that the molecular basis for Trifolium spp. is due activity of a family R2R3-MYB genes. genes were identified associated with two classic pigmentation loci T. repens. The R locus 'red leaf', midrib' and fleck' conditioned by single MYB gene, RED LEAF....
The genus Trifolium (Leguminosae), which includes several important forage legumes of temperate and subtropical regions, is characterized by small chromosomes uniform size. Cytogenetic mapping the two multigene families coding for 18S-5.8S-26S rRNA 5S in white clover ( T. repens) seven closely related species/subspecies was carried out using fluorescence situ hybridization (FISH). 18S-26S rDNA, generally confined to nucleolus organizer regions (NORs), consistently located proximally on...
White clover (Trifolium repens) is a ubiquitous weed of the temperate world that through use improved cultivars has also become most important legume grazed pastures world-wide. It long been suspected to be allotetraploid, but diploid ancestral species have remained elusive. Putative ancestors were indicated by DNA sequence phylogeny T. pallescens and occidentale. Here, we further evidence as well combination molecular cytogenetics (FISH GISH) experimental hybridization test hypothesis white...
Abstract This review examines two classes of organism that live in symbiosis; grasses, and fungi. Specifically it deals with grasses the tribe Hordeeae (formerly Triticeae) subfamily Poöideae Epichloë fungi family Clavicipitaceae. endophytes, particularly asexual forms, have important roles pastoral agricultural systems Americas, Australia, New Zealand. Selected strains add value to some grass‐based forage by providing both biotic abiotic stress resistance. The importance cereal such as...
Abstract Industries based on pastoral farming have increased their contribution to GDP from 13.5 17% since 1990 as the result of markedly intensified practices. In future, we predict that this intensification will continue but, at same time, there be an emergence efficient, lower‐input sector with almost no environmental footprint. Both sectors require continuing input by pasture plant breeders. Over past 20 years, development cultivars has become totally industry funded, support Crown...
Abstract Winter cover crop studies were conducted for 17 years with cotton grown on a Dubbs‐Dundee soil complex at the University of Arkansas Delta Branch Experiment Station. This experiment was established in 1972 to investigate changes induced by winter crops rye, vetch, and lupine. The rye lupine later changed + vetch crimson clover, resp. Cotton yield responses found be highly dependent growing season. Although averaged seedcotton increase, certain had drastic reductions. not designed...
Improving the genetic merit of temperate forage legumes helps ensure profitability and sustainability our Australasian pastoral industries. Today’s plant breeders are supported by a range underpinning research activities including resources exploration enhancement, physiology, health, feed quality, agronomy, quantitative genetics biotechnology; have collaborative interfaces with animal farm systems science. Lifting rate gain integration molecular tools, innovative breeding strategies, new is...
A white clover variety selected for New Zealand moist hill country was compared with three other varieties in at Ballantrae. Small plots of the selection, Grasslands Huia, Pitau, and resident Ballantrae were planted into paddocks receiving high or low superphosphate applications different managements - rotational grazing by cattle, sheep, set-stocked sheep most year. Numbers stolons, dry matter (DM) total DM production, proportion cut herbage determined twice yearly years. After one year...
White clover (Trifolium repens) is adapted to moist, fertile soils in temperate zones. Despite its heterozygous allotetraploid nature, it lacks useful genetic variation for survival and growth semi-arid, infertile soils. Although white apparently genetically isolated 11 other taxa have so far been found that can be artificially hybridised into the wider gene pool. These species range from annuals long-lived, hardy perennials with adaptations stress environments, they potentially provide new...
Interspecific hybridisation is being utilised in white clover (Trifolium repens L.) breeding programs to overcome factors currently restricting productivity and persistence. Valuable new traits that may be introduced from the wild relative T. uniflorum include root characteristics other adaptations its natural, Mediterranean habitat. This study examined effect of on growth macronutrient composition compared with × backcross 1 (BC1) hybrids two glasshouse sand culture experiments. Shoot dry...
Eighty-two white clover lines from overseas and 13 hill country collections within New Zealand have been examined on a site for their persistence production potential under sheep grazing infertile soils. By the third year of trial only seven were equal to or better than Huia. These included two (one cultivar France ('Crau') line Hampshire, U.S.A.) five country. This is considered be strong argument use material in breeding conditions.
White clover (Trifolium repens L.) is a widely used and highly valued temperate legume; however, its productivity survival are restricted under dryland drought conditions. This study investigated whether resistance of white could be improved by interspecific hybridisation with Trifolium uniflorum L. After almost 4 months without irrigation in rain-shelter facility, shoot dry weight (DW) decreased significantly less first-generation backcross (BC1) hybrids (–47%) than second-generation (BC2)...
Germplasm accessions of Trifolium nigrescens Viv. were found to belong three distinct taxa which differed in morphology, hybrid seed-set crosses among themselves and with white clover ( T. repens L.), chromosomal distribution rDNA genes, internally transcribed spacer (ITS) region sequences. These taxonomic groups correspond ssp. , petrisavii var. meneghinianum . The existence has been rejected or ignored recent treatments. present study indicates that it is very distinctive warrants at least...
Abstract A comparison was made of establishment five white clover lines sown as pure swards on soil infested with stem eelworm (Ditylenchus dipsaci) and uninfested soil. On two found to be resistant (Morocco × ‘Grasslands 4700’ Ladino 4700’) showed most rapid least production loss due poor establishment. very susceptible line from Israel suffered severe attack, the varieties Huia’ 4700’, known intermediate susceptibility, an effects All except Israeli recovered initial effect attack newly...
DNA sequence similarities and hybridization patterns in Trifolium (clovers) section Trifoliastrum suggest that rapid radiation from a common ancestral source led to this complex of diverse species distributed across Europe, western Asia North Africa. Two the most geographically ecologically divergent these are rhizomatous T. ambiguum high altitudes eastern Europe stoloniferous occidentale sea level Europe. Attempts were made hybridize ascertain whether, despite separation, gene flow could be...