Publications

genomic heterogeneity of rice dwarf phytoreovirus field isolates and nucleotide sequences of variants of genome segment 12.	electrophoretic profiles of the dsrnas of field isolates of rice dwarf virus (rdv) were compared with those of an isolate maintained at hokkaido university (rdv-h). unexpectedly, the genomic dsrnas of most of the field isolates showed distinct electrophoretic mobility profiles. this was the case even among isolates from the same region. genome segment 12 (s12) from some variants migrated faster than s12 from rdv-h. these rnas were converted to full-length cdnas and sequenced. s12 from all the va ...	1994	8046386
rice as the most influential source of cadmium intake among general japanese population.	the objective of the present study is to examine whether rice is still a leading source of cadmium (cd) burden among general populations in japan. for this purpose, 10 prefectures were selected from all over japan (including the northern- and southern-most hokkaido and okinawa prefecture, respectively). cadmium levels in urine of never-smoking women (corrected for creatinine; cd-ucr) were compared with the rice- and wheat product-based cd intake, which were estimated from cd contents in rice and ...	2003	12670756
mapping of qtls conferring extremely early heading in rice (oryza sativa l.).	two genes related to extremely early heading were identified in populations derived from crosses between hoshinoyume, a variety adapted to the northernmost limit of rice cultivation (hokkaido), and nipponbare, a variety adapted to the temperate region of japan. the segregations for heading date clearly revealed that a two-gene model determined the extremely early heading in the f(2) and bc(1)f(1) populations under natural field conditions in hokkaido. using molecular markers corresponding to ten ...	2005	15940510
incubation period as a clinical predictor of botulism: analysis of previous izushi-borne outbreaks in hokkaido, japan, from 1951 to 1965.	this study investigated 21 foodborne type-e botulism outbreaks, without antitoxin administration, from 1951 to 1965 in hokkaido, japan, to characterize the descriptive epidemiology and evaluate the relationship between case fatality and incubation period. the median (25-75% quartile) attack rate and case fatality, which were evaluated by outbreak, were 58.3% (38.0-73.2) and 25.7% (0.1-50.0) respectively. individual records of 64 diagnoses, including 31 deaths, were also examined using logistic r ...	2007	16684403
genetic shift in local rice populations during rice breeding programs in the northern limit of rice cultivation in the world.	the rapid accumulation of pre-existing mutations may play major roles in the establishment and shaping of adaptability for local regions in current rice breeding programs. the cultivated rice, oryza sativa l., which originated from tropical regions, is now grown worldwide due to the concerted efforts of breeding programs. however, the process of establishing local populations and their origins remain unclear. in the present study, we characterized dna polymorphisms in the rice variety kitaake fr ...	2015	26021294