Kunihiko Komatsu

Learn More
Pod dehiscence (shattering) is essential for the propagation of wild plant species bearing seeds in pods but is a major cause of yield loss in legume and crucifer crops. Although natural genetic variation in pod dehiscence has been, and will be, useful for plant breeding, little is known about the molecular genetic basis of shattering resistance in crops.(More)
Soybean (Glycine max [L.] Merr.) seeds are rich in protein, most of which is contributed by the major storage proteins glycinin (11S globulin) and β-conglycinin (7S globulin). Null mutations for each of the subunits of these storage proteins were integrated by crossbreeding to yield a soybean line that lacks both glycinin and β-conglycinin components. In(More)
The common cutworm (CCW, Spodoptera litura Fabricius) is one of the most serious pests of soybean (Glycine max (L.) Merr.). Previously, two quantitative trait loci (QTLs) for antibiosis resistance to CCW, CCW-1 and CCW-2, were detected in the resistant cultivar Himeshirazu. In this study, we conducted an anti-xenosis bioassay using a recombinant inbred(More)
GmPT7 was originally identified as an arbuscular mycorrhiza-inducible gene of soybean that encodes a member of subfamily I in the PHOSPHATE TRANSPORTER 1 family. In the present study, we established conditions under which a number of dwarf soybean plants complete their life cycles in a growth chamber. Using this system, we grew transgenic soybean with a(More)
Among commonly applied molecular markers, simple sequence repeats (SSRs, or microsatellites) possess advantages such as a high level of polymorphism and codominant pattern of inheritance at individual loci. To facilitate systematic and rapid genetic mapping in soybean, we designed a genotyping panel comprised 304 SSR markers selected for allelic diversity(More)
To investigate the carcinogenesis of estrogen with respect to the chemical behavior of estrogen 6-sulfates, two epimeric 6-sulfates, pyridinium 3-methoxyestra-1,3,5(10)-trien-6 alpha-yl (8) and -6 beta-yl (11) sulfates, were synthesized as the model compounds, and their chemical reactivities were examined. These sulfates were shown to be highly reactive: in(More)
Soybean fasciation is controlled by a recessive gene affecting the shape of the aerial parts of the plant, which is characterized by flattened stem, infrequent branches and clustering of flowers and pods on shoot apices. Morphological feature of the fasciation mutation has been dissected, but molecular information is still limited. We developed three(More)
The length of the reproductive period affects the grain yield of soybean (Glycine max [L.] Merr), and genetic control of the period might contribute to yield improvement. To detect genetic factor(s) controlling the reproductive period, a population of recombinant inbred lines (RILs) was developed from a cross between Japanese landrace 'Ippon-Sangoh' and,(More)
The peanut stunt virus (PSV) causes yield losses in soybean and reduced seed quality due to seed mottling. The objectives of this study were to determine the phenotypic reactions of soybean germplasms to inoculation with two PSV isolates (PSV-K, PSV-T), the inheritance of PSV resistance in soybean cultivars, and the locus of the PSV resistance gene. We(More)
Zinc oxide cluster cations have been analyzed by ion mobility spectrometry using a home-made drift cell combined with a time-of-flight reflectron mass spectrometer. Structural changes from cyclic to tube like structures were observed around n = 8, corresponding to predictions by theoretical calculations. The structures were assigned by comparing with the(More)
  • 1