- 著者
- Yoko Takeuchi Emika Kakizoe Ryosuke Yoritomi Miyuki Iwato Akira Kanno Takao Ikeuchi Mitsutaka Mori Kyoko Murakami Atsuko Uragami Masaru Matsumoto Junichiro Masuda Kaori Sakai Yukio Ozaki
- 出版者
- 一般社団法人 園芸学会
- 雑誌
- The Horticulture Journal (ISSN:21890102)
- 巻号頁・発行日
- pp.OKD-104, (Released:2017-09-07)
- 被引用文献数
- 5
We investigated the resistance to stem blight disease (Phomopsis asparagi (Sacc.)) in the progeny of two combinations of interspecific crosses between Asparagus officinalis (sensitive) and Asparagus A. kiusianus (resistant) in an effort to produce resistant cultivars. The progeny showed different degrees of disease severity, depending on the combination of crosses. Most of the hybrids derived from AO0060 (A. officinalis) × AK0501 (A. kiusianus) showed high disease resistance comparable to that of A. kiusianus. The results indicate that disease resistance could be introduced from A. kiusianus into A. officinalis, and that the selection of an appropriate cross combination is important for the production of disease-resistant cultivars. We analyzed the parents and hybrids of reciprocal crosses between A. officinalis and A. kiusianus using derived cleaved amplified polymorphic sequence markers to investigate the inheritance of the chloroplast genome, whose inheritance and genetic characteristics are not yet known. The chloroplast DNAs were inherited from the maternal parent, indicating that no major genes related to stem blight resistance were found in the chloroplast DNA.
- 著者
- Yoko TAKEUCHI Norio TOMII Chikara HIRAI
- 出版者
- 公益財団法人 鉄道総合技術研究所
- 雑誌
- Quarterly Report of RTRI (ISSN:00339008)
- 巻号頁・発行日
- vol.48, no.4, pp.197-201, 2007 (Released:2007-12-10)
- 参考文献数
- 8
- 被引用文献数
- 3 18 9
The aim of this study is to examine the qualitative and quantitative characteristics that robust train schedules should have. The method we propose to evaluate the robustness of train schedules has two main characteristics; one is a focus on passenger disutility, and the other involves the development of a probabilistic model for the statistical evaluation of train operations. To calculate the robustness indices, we applied a Monte Carlo simulation method that performs iterative train-passenger simulations. We then carried out simulation experiments using actual data to calculate the robustness indices for two train schedules, and compared the results.
- 著者
- Yukio Ozaki Yoko Takeuchi Miyuki Iwato Satomi Sakazono Hiroshi Okubo
- 出版者
- 園芸学会
- 雑誌
- Journal of the Japanese Society for Horticultural Science (ISSN:18823351)
- 巻号頁・発行日
- pp.CH-073, (Released:2014-07-18)
- 被引用文献数
- 1 4
The origin of a spontaneous triploid asparagus plant from crosses of 2x × 2x was investigated by SSR and flow cytometric analyses. One hundred and twenty-four progeny were obtained from crosses between a diploid female ‘Gold Schatz’ and a diploid male ‘Hokkai 100’. SSR analysis proved that two and one genes were transmitted from the maternal and paternal parents, respectively, at each SSR locus of one progeny, 07M-61, whereas one gene each was from the female and male parents in the other diploid progeny. Triploidy of 07M-61 was confirmed by flow cytometric analysis. It was suggested that the triploid plant was derived from fertilization between an unreduced egg and reduced sperm nuclei, given its SSR genotypes. It was also suggested that the unreduced maternal gamete was derived from first division restitution (FDR) or second division restitution (SDR) with chiasma occurrence during meiosis. There were no noticeable morphological differences between the triploid and diploid progeny.