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81.
Ichiro Kanno Yutaka Onikura Shizuoki Arimura Shoichi Tokudome 《Soil Science and Plant Nutrition》2013,59(3):6-15
One of the main objects of the present study is to determine what genetic soil types have been formed from ultra-basic rocks such as serpentine under humid, subtropical conditions. Red-Yellow soils, which are important zonal soils in Kyushu, have not been formed from serpentine, but Brown Forest soils have been formed, as will be described in the part 2 of this paper. This fact for the most part has been governed by the mineralogical and chemical peculiarities of serpentine. Therefore the part 1 of this paper deals with the mineralogical and chemical characteristics of serpentine as a parent rock from which Brown Forest soils have developed. 相似文献
82.
Quantitative evaluation of the degree of sprout leaf bending of rice cultivars using P-type Fourier descriptors and principal component analysis 总被引:1,自引:0,他引:1
For decades, seedling peaches have been used as the standard rootstock in California almond orchards. Vigorous, deep rooted
trees are needed in almond orchards for maximum yields and to withstand the annual tree-shaking at harvest. Currently, researchers
are actively evaluating rootstocks for almonds in field trials and in various screening protocols. In this study, seedling
rootstocks, obtained from male-sterile advanced generation peach-almond (PEAL) hybrid mother trees, were compared with ‘Nemaguard’
peach seedlings for emergence in the nursery row, trunk caliper at propagation time, and end of season dormant above ground
tree weight. Seedling emergence was affected significantly (P ≤ 0.05) by seed source, as was trunk caliper and end of season dormant above ground tree weight. Trunk caliper and dormant
above ground tree weight were also affected significantly (P ≤ 0.05) by planting year. Results obtained in this study demonstrate the enhanced first year growth from seedlings of advanced
generation PEAL hybrids, as compared to ‘Nemaguard’ seedlings. Seedling emergence in the rootstock bed was not affected significantly
by planting year. Advanced generation PEAL hybrid seedlings were ready for June-budding at an earlier date compared to ‘Nemaguard’
seedlings, providing the potential for larger-sized finished nursery stock by the end of the growing season. Due to the male-sterile
status of the advanced generation PEAL mother trees, bloom periods of several root-knot nematode resistant rootstock cultivars
were examined for their degree of synchronicity with the mother trees. The examined rootstocks and mother trees varied in
both chill hour and post-chill heat requirements necessary to effect bloom. ‘Flordaguard’ peach rootstock began bloom in advance
of the male-sterile mother trees, whereas the bloom period of ‘Tsukuba No. 4’ occurred well after, suggesting they would not
be effective synchronous pollenizers for consistent hybrid seed production. Based on more limited flowering period data, better
bloom synchronicity was achieved with a Tsukuba No. 4 X Flordaguard hybrid. 相似文献
83.
A new method is presented for detecting rows of rice seedlings to facilitate the navigation of rice transplanters. Generally, an independent NIR or RGB camera is used as a vision sensor for agricultural vehicles; however, strong reflections on the water surface make row detection more difficult in flooded paddy fields compared to dry fields. To solve this problem, we developed a dual-spectral camera system that consists of a pair of low-cost monochrome cameras with optical filters. Different wavelength images of the same location can be taken simultaneously in real-time. An experiment conducted under cloudy conditions showed that this system could reduce water surface noise and clearly detect seedling rows. 相似文献
84.
Takeshi Yokono Yutaka Tamai Tomonori Azuma Yoh Sakuma Kiyoshi Miura Yasuo Kojima Masahide Sunagawa Masatake Ohmasa 《Journal of Wood Science》2000,46(6):480-484
The purpose of this research was to analyze the karyotype of the interspecific fusants of twoPleurotus species. Auxotrophic mutants derived from the cultivated strain ofP. ostreatus andP. cornucopiae were used. Protoplasts were fused electrically, and the fusants were selected under auxotrophic complementation. Esterase isozyme analysis showed that several fusants had isozyme bands originating from both parental strains, and others had unilateral isozyme bands. The fusant that had expressed isozyme bands of both parental strains showed chromosomal DNA bands of both of the parental strains in pulsedfield gel electrophoresis analysis. Despite the above results, the chromosomal composition of the fusants obtained by the pulsed-field gel electrophoresis did not exhibit all of the bands of both fusion parents. 相似文献
85.
Doolyi Kim Yutaka Tamai Tomonori Azuma Akira Harada Akira Ando Yoh Sakuma Kiyoshi Miura 《Journal of Wood Science》2000,46(6):466-469
The karyotype ofFlammulina velutipes (Curt.: Fr.) Sing. was analyzed electrophoretically using contourclamped homogeneous electric field gel electrophoresis and hybridization with DNA probes. The chromosomal DNA from the monokaryon (Fv-4K) and the dikaryon (Fv-4) were resolved into six and eight bands, respectively. The sizes of the chromosomes ranged from 1.9 to 6.0 megabase (Mb) pairs. Each of the separated bands of chromosomal DNA was identified by use of five cloned probes. The number of these chromosomes was estimated to be 6 and 12, respectively; and the size of the entire genome was estimated to be about 20.1 and 38.6Mb, respectively. From a comparison of the hybridization patterns, the existence of allelic chromosomes of different sizes was deduced in the Fv-4 strain. 相似文献
86.
Ozaki K Nakahara Y Narama I 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(3):289-291
A dog presented with hematuria, and two small polypoid masses were detected in the urinary bladder. Histopathologically, the masses were located in the mucosal or submucosal layer. That tissue consisted of a random proliferation of spindle-shaped, round and pleomorphic cells with single or multiple large atypical nuclei and abundant cytoplasm, and eosinophil infiltration. These large cells were confirmed by immunohistochemical staining as fibroblasts, myofibroblasts and macrophages. Mitotic figure was rarely seen. These masses were diagnosed as eosinophilic polypoid cystitis with pseudosarcomatous proliferative tissue, since they consisted of a wide variety of cells and showed low growth activity. 相似文献
87.
Nikaidou S Ishizuka M Maeda Y Hara Y Kazusaka A Fujita S 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2005,67(1):137-138
Green tea, one of the most popular beverages consumed in Asian countries, has been reported to possess anticarcinogenic and antimutagenic properties. The aim in this study is to test the radical scavenging effect of catechins and caffeine, which were major components of green tea, and if they really prevent oxygen radical-induced mutagenesis. We used TA102 strain of Salmonella typhimurium which is sensitive to hydroxyl radical in the Ames mutation assay. We found that caffeine did not show any effects on mutagenesis in this system, but catechin significantly reduced mutagenesis or genotoxicity caused by hydroxyl radical. This radical-scavenging action of catechins may indeed contribute to the anticarcinogenic activity of green tea as has been proposed. 相似文献
88.
Vinícius Silva Junqueira Daniela Lourenco Yutaka Masuda Fernando Flores Cardoso Paulo Svio Lopes Fabyano Fonseca e Silva Ignacy Misztal 《Journal of animal science》2022,100(5)
Efficient computing techniques allow the estimation of variance components for virtually any traditional dataset. When genomic information is available, variance components can be estimated using genomic REML (GREML). If only a portion of the animals have genotypes, single-step GREML (ssGREML) is the method of choice. The genomic relationship matrix (G) used in both cases is dense, limiting computations depending on the number of genotyped animals. The algorithm for proven and young (APY) can be used to create a sparse inverse of G () with close to linear memory and computing requirements. In ssGREML, the inverse of the realized relationship matrix (H−1) also includes the inverse of the pedigree relationship matrix, which can be dense with a long pedigree, but sparser with short. The main purpose of this study was to investigate whether costs of ssGREML can be reduced using APY with truncated pedigree and phenotypes. We also investigated the impact of truncation on variance components estimation when different numbers of core animals are used in APY. Simulations included 150K animals from 10 generations, with selection. Phenotypes (h2 = 0.3) were available for all animals in generations 1–9. A total of 30K animals in generations 8 and 9, and 15K validation animals in generation 10 were genotyped for 52,890 SNP. Average information REML and ssGREML with G−1 and using 1K, 5K, 9K, and 14K core animals were compared. Variance components are impacted when the core group in APY represents the number of eigenvalues explaining a small fraction of the total variation in G. The most time-consuming operation was the inversion of G, with more than 50% of the total time. Next, numerical factorization consumed nearly 30% of the total computing time. On average, a 7% decrease in the computing time for ordering was observed by removing each generation of data. APY can be successfully applied to create the inverse of the genomic relationship matrix used in ssGREML for estimating variance components. To ensure reliable variance component estimation, it is important to use a core size that corresponds to the number of largest eigenvalues explaining around 98% of total variation in G. When APY is used, pedigrees can be truncated to increase the sparsity of H and slightly reduce computing time for ordering and symbolic factorization, with no impact on the estimates. 相似文献
89.
90.
Tsutomu TSUKADA Kunitada SATO Masaharu MORIYOSHI Masanori KOYAGO Yutaka SAWAMUKAI 《Journal of Equine Science》2008,19(2):35-38
A total of 88 thoroughbred mares were diagnosed with clinical ovarian quiescence and
subjected to four treatment regimens. Using PMSG, hCG or combinations of both. A high dose
combination of 5,000IU PMSG with 5,000IU hCG showed significantly higher rates of marked
estrus and ovulation induction (P<0.01) as well as conception rates (P<0.05). In the
present study, the administration of a high-dose combination of PMSG with hCG was shown to
be an effective treatment of ovarian quiescence in light mares. 相似文献