Journal of Crop Research
Online ISSN : 2424-1318
Print ISSN : 1882-885X
ISSN-L : 1882-885X
Volume 63
Showing 1-9 articles out of 9 articles from the selected issue
Research Article
  • Seiko Morishita, Akihiro Tsuji, Takatsugu Sugiyama, Toshihide Ikeda
    2018 Volume 63 Pages 1-8
    Published: 2018
    Released: December 10, 2018
    JOURNAL OPEN ACCESS
    Tenobe(hand-stretched)-somen noodles are a traditional Japanese food made mainly of wheat flour. Tenobesomen noodles produced in Nara prefecture are well-known as ‘Miwa-somen’. To make Tenobe-somen noodles, a suitable dough strength is required in order to stretch the dough into very thin noodles. The wheat cultivar ‘Fukuharuka’ is also produced in Nara prefecture, but the Tenobe-somen noodle quality from ‘Fukuharuka’ is lower than usual because the dough strength is inferior. In this report, over 10% protein in the wheat flour was suggested to be required to make Tenobe-somen noodles with no difficulties if using only ‘Fukuharuka’. Moreover, a strong positive correlation was found between the protein concentration in ‘Fukuharuka’ seeds and amount of nitrogen top-dressing with ammonium sulfate 10 days after anthesis. A strong positive correlation was also found between the protein concentration in ‘Fukuharuka’ flour and dough strength measured by SDS sedimentation test. Therefore, improvement of dough strength and Tenobe-somen noodle quality may be possible by increasing the amount of nitrogen top-dressing 10 days after anthesis. The springy food texture is a distinctive characteristic of Tenobesomen noodles made of ‘Fukuharuka’.
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  • Takuya Kondo, Yuki Watanabe, Masayoshi Teraishi, Yoshihisa Fujii, Yuta ...
    2018 Volume 63 Pages 9-13
    Published: 2018
    Released: December 10, 2018
    JOURNAL OPEN ACCESS
    Acoustic emission(AE) method was applied to assessment of soybean flooding tolerance at germination. Frequencies of elastic waves, accompanied by microfracture inside the immersed soybean seeds, were counted and evaluated its relationships to seed germination ratio after one-day water immersion using recombinant inbred lines. There was a significant difference in the AE frequencies between the normal germinated population and the poorly germinated population, but no relationship between the AE frequencies and the flooding tolerance was found and no valid QTL was detected. We expect localized AE frequeicies, such as in cotyledonary nodes not whole seed, manifest the relationships to flooding tolerance.
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  • Chong XU, Takuji Tsukiyama, Masayoshi Teraishi, Takatoshi Tanisaka, Yu ...
    2018 Volume 63 Pages 15-19
    Published: 2018
    Released: December 10, 2018
    JOURNAL OPEN ACCESS
    In a rice variety ‘Gimbozu’ genome, transposition of miniature Ping (mPing) often causes the modification of gene expression and the disruption of gene function. IM294 is a slender-glume mutant line induced from Gimbozu by gamma-ray irradiation, and its mutant phenotype is caused by an insertion of mPing at the fourth exon of Rurm1 (rice ubiquitin related modifier-1) gene. Inserted mPing is excised from the Rurm1 gene and slender-glume mutant plant reverts to the original normal-glume plant. At the time of this reverse mutation, some of the revertants exhibited a vigorous growth. We named this revertant as a vigorously growing plant in IM294(VGI). Still we do not know any molecular clue regarding the mechanism of vigorous growth of VGI. In this study, we investigated nine agronomic traits including the grain shape and the grain number per panicle of a progeny plant of a VGI. QTL analysis was conducted to determine the chromosome region, which might be corresponding to the genetic factors modified by mPing insertion.
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Short Communication
  • Germination Rate of Stored Seeds and Influence of Soil condition on Seedling Establishment Rate
    Junya Nakagawa, Hisato Katayama
    2018 Volume 63 Pages 21-24
    Published: 2018
    Released: December 10, 2018
    JOURNAL OPEN ACCESS
    Wheat seed is stored for steady supply, and the seed produced in previous year is often distributed to farmer. Therefore, we investigated the germination rate of the seeds after one year storage which differed in the grain moisture at harvesting time. The moisture of grain at harvesting time did not have an influence on the germination rate after one year preservation. We changed flooding processing in a pot examination and investigated the influence of the soil water that gave to establishment rate of the different germination rate seeds. The establishment rate was decreased by sowing in the soil. The seed which has high germination rate had few decreases in germination rate. In addition, the decreases of establishment rate were large in high soil moisture condition.
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  • Yasuo Yasui, Yuji Toukura, Yasunari Fujita
    2018 Volume 63 Pages 25-29
    Published: 2018
    Released: December 10, 2018
    JOURNAL OPEN ACCESS
    Quinoa(Chenopodium quinoa Willd.), a member of the Amaranthaceae family, is a pseudo-cereal crop that originated from the Andean region of South America. Although the seed grain is relatively small(2-3 mm in diameter), the Food and Agriculture Organization of the United Nations(FAO) has classified quinoa as a food of high nutritive value, and the harvested area of this crop is expanding rapidly globally. In addition to its excellent nutritional profile, quinoa plants are able to tolerate stressful environments and can thrive in arid and salty soils that would not support the growth of major crops such as rice and wheat; therefore it is considered an important crop with the potential to contribute to food security worldwide. Recently, with the aim of understanding the mechanisms underlying the superior nutritional characteristics and environmental adaptability of quinoa, we determined the first draft genome sequence of quinoa and then provided the open access Quinoa Genome DataBase(QGDB; http://quinoa.kazusa.or.jp). Subsequently, we conducted field investigations and interviews to learn about the quinoa cultivation system used in an arid field around the salt flats of Uyuni in Bolivia. In this paper, we describe the cultivation management and productivity of quinoa, and list phenotypic traits that are targeted in quinoa breeding programs in the Uyuni region. We also report on an integrated crop-livestock system with llama(Lama glama) seen in this region, and effective utilization of indigenous genetic resources such as a wild legume, Lupinus pubescens, for sustainable production of quinoa.
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Note
Review Article (Symposium)
  • Hirokazu Toju
    2018 Volume 63 Pages 39-41
    Published: 2018
    Released: December 10, 2018
    JOURNAL OPEN ACCESS
    Recent advances in biodiversity inventory analyses have helped us uncover “hidden” diversity of bacteria and fungi associated with plants. However, we are at an early stage of developing methods for manipulating and managing plant-associated microbiomes. In this reveiw, I introduce high-throughput sequencing methods for describing microbiome structures and then discuss future directions of interdisciplinary research for controlling microbiomes in agroecosystems.
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  • Koki Homma, Masayasu Maki, Naoyuki Hashimoto
    2018 Volume 63 Pages 43-48
    Published: 2018
    Released: December 10, 2018
    JOURNAL OPEN ACCESS
    Both the simulation model and remote sensing have been extensively researched since the 1970s, and it is considered that the technologies have not yet reached the practical level despite the impression that they have almost reached it. In this article, The authors discussed the recent research trends, issues and future prospects of these technologies. Simulation models predicting the growth and yield of crops have been successful in future projections under the global warming environment, but has not yet been developed for cultivation support in Japan. This is thought to be due to the fact that much input data is required and the output remains within the range of known knowledge. Meanwhile, the price of UAV(Unmanned Air Vehicle) has been reduced in recent years, which makes farmers available for remote sensing. However, UAV is mostly used just to take photographs from the sky. The strategy to develop these technologies for farmers is necessary by clarifying the concept, data nececity and cultivation support. The authors conducted researches on remote sensing, simulation models, and their integration, mainly in farmer fields in Southeast Asia in relation to farmer's cultivation management and climate change impact assessment. Currently the authors are developing cultivation support technology for the large-sized field of agricultural corporations newly farmed in Sendai after the Great East Japan Earthquake. Although rice growth and yield has been successfully simulated with remote sensing data, further development is necessary in terms of effective cultivation support. Due to evolution of machine learning such as deep learning, technology to extract information from images and mass data is expected to be incorporated in agricultural sector. However, analogy from the results of data dependent models such as nonparametric models, it seems difficult to obtain information beyond the known by itself. The authors are convinced that analysis with directionality such as simulation model is required.
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  • Michihisa Iida
    2018 Volume 63 Pages 49-53
    Published: 2018
    Released: December 10, 2018
    JOURNAL OPEN ACCESS
    In order to solve aging of farmer and decrease of farmer population in Japan, it is expected that “Robotic Farming” by unmanned machine will be realized. In May, 2017, it was released that a robot tractor was commercialized in Japan. Robotization of agricultural machinery is important theme overseas too, technology development for implementation of agricultural robot is promoted in the world. In this report, technology for head-feeding combine robots that author has been developed are introduced, and feasibility and prospect of robotic agricultural machinery is described.
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