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31.
Kazuyuki?Mori Yu?Sakamoto Nobuhiro?Mukojima Seiji?Tamiya Takashi?Nakao Takashige?Ishii Kazuyoshi?HosakaEmail author 《Euphytica》2011,180(3):347-355
Multiplex PCR is practically a reasonable choice for molecular marker-assisted selection in potato breeding. We had developed
and were using a multiplex PCR method for selection of resistance genes to cyst nematode (H1), Potato virus X (Rx1) and late blight (R1 and R2). Since then, more reliable and tightly linked markers for H1 and R2, and a new marker for resistance to Potato virus Y (Ry
chc
) were developed. In this article, all these superior markers, including a positive marker to eliminate PCR-failed samples,
were incorporated into one multiplex PCR assay. Using the newly developed multiplex PCR technique, five plants potentially
harboring all five resistance genes were selected from 96 hybrid plants approximately 5 h after DNA extraction, which is a
third of the operation time compared with separate PCR reactions for each marker. 相似文献
32.
The first stars fundamentally transformed the early universe by emitting the first light and by producing the first heavy elements. These effects were predetermined by the mass distribution of the first stars, which is thought to have been fixed by a complex interplay of gas accretion and protostellar radiation. We performed radiation-hydrodynamics simulations that followed the growth of a primordial protostar through to the early stages as a star with thermonuclear burning. The circumstellar accretion disk was evaporated by ultraviolet radiation from the star when its mass was 43 times that of the Sun. Such massive primordial stars, in contrast to the often-postulated extremely massive stars, may help explain the fact that there are no signatures of the pair-instability supernovae in abundance patterns of metal-poor stars in our galaxy. 相似文献
33.
Onda K Sugiyama M Niho K Sato R Arai S Kaneko K Ito S Muto M Suganuma T Wakao Y Wada Y 《The Canadian veterinary journal. La revue veterinaire canadienne》2011,52(6):667-669
This study investigated the long-term survival of a calf with cervical ectopia cordis that grew normally, became pregnant, and calved normally. The cow showed normal cardiac function and absence of peripheral circulation abnormalities. This paper documents antemortem characteristics of the affected cow. 相似文献
34.
Morifusa Eto Sachiko Okabe Yoshihisa Ozoe Kazuyuki Maekawa 《Pesticide biochemistry and physiology》1977,7(4):367-377
O,S-Dimethyl phosphoramidothiolate, the insecticide methamidophos, is converted oxidatively into a potent anti-cholinesterase agent by the action of m-chloroperbenzoic acid. The active intermediate is not stable enough to be isolated. From some chemical evidence, the sulfoxide, i.e., dimethyl phosphoramidothiolate S-oxide, is most probably the active intermediate. A similar activation may occur by biological oxidation. 相似文献
35.
Significance of tumor-infiltrating immune cells in spontaneous canine mammary gland tumor: 140 cases
Saeki K Endo Y Uchida K Nishimura R Sasaki N Nakagawa T 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2012,74(2):227-230
The numbers of tumor infiltrating T lymphocytes, B lymphocytes and antigen presenting cells were evaluated in an immunohistochemical manner in 140 canine spontaneous mammary gland tumor (MGT) tissues. As a result, we found a statistically significant increase in the number of intratumoral T lymphocytes (23.2 ± 23.8) in the malignant MGT group (n=51) compared with the benign MGT group (14.0 ± 16.0, n=89; P<0.05). Moreover, the high T lymphocyte infiltration in the malignant group correlated with poor prognosis in multivariate analysis (P<0.05). This study indicated the relationship between increased infiltrating T lymphocytes and canine MGT malignancy. 相似文献
36.
Haiyan Chu Takeshi Fujii Sho Morimoto Xiangui Lin Kazuyuki Yagi 《Soil biology & biochemistry》2008,40(7):1960-1963
Population size of soil ammonia-oxidizing bacteria (AOB) was quantified by real-time PCR in a long-term (16 years) field experiment under different fertilizer managements. AOB population sizes in mineral nitrogen-fertilized soils and organic manure-fertilized soil were 10.3 and 3.1 times, respectively, that of the control, while phosphorus and potassium fertilization had no significant effect. On the other hand, the AOB specific nitrification potential (soil nitrification potential per AOB cell) was significantly higher (P < 0.05) in organic manure-fertilized soil than in mineral-fertilized soils and the control, indicating that AOB was likely more metabolically active in organic manure-fertilized soils than in mineral nitrogen-fertilized soils after long-term application. 相似文献
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39.
Kenji UCHIDA Keiko AKASHI Hidemasa MOTOSHIMA Tadasu URASHIMA Ikichi ARAI Tadao SAITO 《Animal Science Journal》2009,80(2):187-192
We analyzed the microbiota of domestic ropy fermented milk, Caspian Sea yogurt (or 'kasupikai yohguruto' in Japanese), circulated in Japan. We collected six varieties from five localities. Lactococcus ( L) lactis ssp. cremoris was isolated from all samples as the dominant strain at levels of 108 −109 CFU/g. We show this strain produces an extracellular polysaccharide (EPS) that causes the unique characteristic viscosity of the product. From analysis of the RAPD pattern of 60 bacterial isolates from the six samples, we found that 59 strains from a total of 60 isolates were identical and produced this viscosity. Furthermore, PFGE analysis of representative strains from each sample indicated that the isolates could be classified into four subgroups. This suggests these L. lactis ssp. cremoris strains found in Caspian Sea yogurt may have been slightly mutated during subculture in Japan. In addition, Lactobacillus (L.) sakei ssp. sakei were isolated from three samples; L. plantarum , Gluconoacetobacter sacchari and Acetobacter aceti were isolated from two samples; and L. paracasei , L. kefiri , Leuconostoc ( Leu. ) mesenteroides were isolated from one sample. 相似文献
40.