A5074529174- Genetic Mapping and Diversity in Plants and Animals
- Rice Cultivation and Yield Improvement
- GABA and Rice Research
- Plant Molecular Biology Research
- Plant responses to water stress
- Coleoptera Taxonomy and Distribution
- Plant Physiology and Cultivation Studies
- Horticultural and Viticultural Research
- Plant Reproductive Biology
- Fungal Plant Pathogen Control
- Forest Insect Ecology and Management
- Plant Disease Resistance and Genetics
- Chromosomal and Genetic Variations
- Light effects on plants
- Genetics and Plant Breeding
- Plant Genetic and Mutation Studies
- Plant tissue culture and regeneration
- Genetic diversity and population structure
- Wheat and Barley Genetics and Pathology
- Plant nutrient uptake and metabolism
- Genomics and Phylogenetic Studies
- Soybean genetics and cultivation
- Plant Micronutrient Interactions and Effects
- Plant Stress Responses and Tolerance
- Aluminum toxicity and tolerance in plants and animals
Kobe University
2016-2025
University College London
2020
John Innes Centre
2012-2019
Norwich Research Park
2012
Nara Institute of Science and Technology
2005-2011
Northwest African American Museum
2006
Shibuya (Japan)
2001
Shibuya University Network
2000
A short exposure to light in the middle of night causes inhibition flowering short-day plants. This phenomenon is called break (NB) and has been used extensively as a tool study photoperiodic control for many years. However, at molecular level, very little known about this phenomenon. In rice (Oryza sativa), 10 min 14-h caused clear delay flowering. single NB strongly suppressed mRNA Hd3a, homolog Arabidopsis thaliana FLOWERING LOCUS T (FT), whereas mRNAs OsGI Hd1 were not affected. The...
In angiosperms, interspecific crosses often display hybrid incompatibilities that are manifested as under-proliferation or over-proliferation of endosperm. Recent analyses using between Arabidopsis thaliana and its related species with different ploidy levels have shown hybridization causes delayed developmental transition increased mitotic activity in the this study, we investigated endosperm development diploid Oryza species. a cross female O. sativa male punctata, found was reduced size...
Asian rice (Oryza sativa L.) is consumed by more than half of the world's population. Despite its global importance, process early domestication remains unclear. During domestication, wild rufipogon Griff.) acquired non-seed-shattering behavior, allowing humans to increase grain yield. Previous studies argued that a reduction in seed shattering triggered sh4 mutation led increased yield during but our experiments using introgression lines show domesticated allele alone insufficient for loss...
The genetic mechanisms of reproductive isolation have been widely investigated within Asian cultivated rice (
Abstract Geographic variation and interspecific differentiation in body size (body length) were analyzed for 15 species of the carabid subgenus Ohomopterus (genus Carabus ; Coleoptera, Carabidae) Japan. Local assemblages this consist up to 5 different classes. These beetles exhibited sexual dimorphism where females are larger than males, except uenoi , which male female sizes equivalent, possibly because exaggerated genitalia. In 9 species, there was a positive correlation between mean...
To study the potential importance of introgressive hybridization to evolutionary diversification a carabid beetle lineage, we studied intraspecific and trans-species polymorphisms in mitochondrial NADH dehydrogenase subunit 5 (ND5) gene sequence (1083 bp) four species subgenus Ohomopterus (genus Carabus) central eastern Honshu, Japan. Of species, C. insulicola is parapatric with other three, can hybridize naturally at least two. This possesses two haplotypes remote lineages. We classified...
A short exposure to light during relative night (night break; NB) delays flowering in the day plant rice. NB acts by downregulating Heading date 3a (Hd3a) expression. Because phytochrome B mutants do not respond and their time is affected even under conditions, phyB required for suppression of Hd3a The effect quantitatively controlled quality either intensity or duration. However, molecular mechanisms that regulate these interactions are poorly understood. Here, we examine roles phytochromes...
Zinc (Zn) is one of the essential mineral elements for both plants and humans. Zn deficiency in human major causes hidden hunger, a serious health problem observed many developing countries. Therefore, increasing concentration edible part an important issue improving nutrition. Here, we found that Australian wild rice O. meridionalis showed higher grain concentrations compared with cultivated other species. The quantitative trait loci (QTL) analysis was then performed to identify genomic...
It is known that the common cultivated rice (Oryza sativa) was domesticated from Asian wild rice, O. rufipogon. Among morphological differences between them, loss of seed shattering one striking characters specific for forms. In order to understand genetic control on habit, QTL analysis carried out using BC2F1 backcross population sativa cv. Nipponbare (a recurrent parent) and rufipogon acc. W630 donor parent). As a result, two strong QTLs were detected chromosomes 1 4, they found be...
Asian cultivated rice Oryza sativa L. was domesticated from its wild ancestor, O. rufipogon. During domestication, the lost seed-shattering behaviour. Previous studies have shown that two major quantitative trait loci (QTLs; qSH1 and sh4) are responsible for degree. Here, we produced introgression lines carrying non-functional alleles 'Nipponbare' at QTLs in genetic background of rufipogon W630, examined effects on seed shattering abscission layer formation. The lines, with Nipponbare either...
In the near future, global average temperature is expected to increase due accumulation of greenhouse gases, and increased temperatures will cause severe sterility in many crop species. rice, since wild species show high genetic variation, they may have potential improve flowering characters cultivars. this study, we investigated under natural conditions by comparing an Asian rice accession Oryza rufipogon W630 (originated from Myanmar) with a Japanese cultivar, O. sativa Japonica cv....
Summary The endosperm of cereal grains represents the most important source human nutrition. In addition, provides many investigatory opportunities for biologists because unique processes that occur during its ontogeny, including syncytial development at early stages. Rice endospermless 1 ( enl1 ) develops seeds lacking an but carrying a functional embryo. produces strikingly enlarged amoeboid nuclei. These abnormal nuclei result from malfunction in mitotic chromosomal segregation...
Domestication and population differentiation in crops involve considerable phenotypic changes. The logs of these evolutionary paths, including natural/artificial selection, can be found the genomes current populations. However, profiles have been little studied tree crops, which specific characters, such as long generation time clonal propagation, maintaining high levels heterozygosity. We conducted exon-targeted resequencing 129 genus Prunus, mainly Japanese apricot (Prunus mume),...
The Asian wild rice, Oryza rufipogon, has partial outcrossing behavior and shows high levels of genetic variation. To estimate an accurate rate annual form O. two backcross lines (Lines R1 R2) between sativa Nipponbare rufipogon W630 were examined under field conditions. A chromosome survey confirmed that these had chromosomal segments at more than 92% marker loci. As for the traits glume, stamen pistil, Line showed similar floral morphology as W630, whereas R2 larger glumes. In 2005, 2006...
Loss of seed shattering was one the key phenotypic changes selected for in domestication many crop species.Asian cultivated rice, Oryza sativa L., domesticated from its wild ancestor, O. rufipogon, and three seed-shattering loci, qSH1, sh4 qSH3, have been reported to be involved loss rice.Here, we analysed behaviour rice using introgression lines carrying alleles Nipponbare genetic background rufipogon W630.We first carried out fine mapping qSH3 region found that locus is localized an 850-kb...
Awns are bristle-like organs at the tips of glumes. Wild rice has maintained long awns for successful seed propagation through dispersal. Seed awning is an interesting trait in domestication. Long might have been beneficial gatherers initial phase domestication; however, awnless phenotypes were preferably selected a later with non-seed-shattering plants. Investigation domestication loci associated awnlessness cultivated will be useful clarifying process and history Quantitative locus (QTL)...