Papers - SOUMA Kousaku
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Assessment of anti-Müllerian hormone levels as a reproductive indicator in Japanese Black cattle
KOYAMA Takeshi, SUZUKI Hiromi, SHIMIZU Miki, MIZUNO Riuru, ISHIGAMI Ayaha, KAMIDATE Nobuyuki, OTANI Yoshihisa, OKUBO Michiko, SOUMA Kousaku, HIRAYAMA Hiroki
Journal of Reproduction and Development 70 ( 0 ) 389 - 395 2024.12
Language：English Publisher：The Society for Reproduction and Development
<p>The size of the ovarian reserve, an indicator of the number of primordial follicles, varies widely among individuals, and declines with age. However, the association between the ovarian reserve and fertility remains unclear. Therefore, in the present study, we analyzed the relationship between plasma concentrations of anti-Müllerian hormone (AMH), a marker of ovarian reserve, and reproductive outcomes in Japanese Black cattle. AMH level quartiles were positively associated with pregnancy following artificial insemination (AI), and the median number of days to pregnancy in Q4 (13 days, 95% confidence interval [CI] = 7–18 days) was significantly shorter than that in Q1 (21 days, 95% CI = 15–46 days). The odds ratio for the predicted pregnancy rate by logistic regression analysis in Q4 (4.06, 95% CI = 1.54–10.67) was also significantly higher than that in Q1. Plasma AMH concentrations were significantly higher in summer (June–August) than in winter (December–February). Furthermore, a strong correlation (r = 0.829, P < 0.001) was observed between plasma AMH concentrations at 2 and 14 months of age. Calves with plasma AMH concentrations of > 700 pg/ml at 2 months old showed a transient increase and maximum AMH concentration within 5 months of birth. Overall, the results of this study indicate that the plasma AMH concentration serves as a predictive marker for the probability of conception following AI in Japanese Black cattle. The current findings contribute to the reliable assessment of AMH production and the early prediction of reproductive performance in sexually mature heifers.</p>
DOI： 10.1262/jrd.2024-047
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Carcass traits and fat quality of breeding emu (Dromaius novaehollandiae) in Northern Japan Reviewed
Yuichi Koshiishi, Michiko Murata-Okubo, Hinami Nakajyo, Rikimaru Machida,, Taiga Yamamoto, Takao Myoda, Yuichi Kameyama, Hiroki Hirayama, Kousaku Souma, Michinari Yokohama, Kenta Wada
Poultry Science 101 102050 - 102057 2022.10
Language：English Publishing type：Research paper (scientific journal)
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Discrimination between two chromatic colors in sika deer Reviewed
Michiko Okubo, Mizuho Sato, Wataru Tamamura, Saori Tsutsumi, Shinpei Morie. Kousaku Souma
Applied Animal Behaviour Science 247 105536 - 105542 2022.02
Language：English Publishing type：Research paper (scientific journal)
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INABA Ryo, KAWAHARA-MIKI Ryouka, SHINOZAWA Akihisa, YASUHARA Taichi, FUJII Takashi, KOYAMA Keisuke, MURATA-OKUBO Michiko, SOUMA Kousaku, HIRAYAMA Hiroki
Journal of Reproduction and Development 68 ( 1 ) 30 - 37 2022
Language：English Publisher：The Society for Reproduction and Development
<p> Although hormonal induction of parturition in cattle results in the successful delivery of healthy calves, the risk of retained fetal membrane is significantly increased. In a previous study, a combination of the long-acting glucocorticoid, triamcinolone acetonide, with a high dose of betamethasone partially normalized the placentomal gene expression during parturition; however, the incidence of retained fetal membrane remained high. This study further explored placentomal dysfunction and aimed to elucidate the mechanism of retained fetal membrane in parturition-induced cows. In this study, transcriptome analysis revealed that enhanced glucocorticoid exposure normalized the expression of a substantial fraction of genes in the cotyledons. In contrast, a significant reduction in the multiple signaling pathway activities, including interferon signaling, was found in the caruncles during induced parturition. Real-time PCR showed that the expression of interferon-tau in the caruncles, but not interferon-alpha or interferon-gamma, was significantly lower in induced parturition than spontaneous parturition. Interferon-stimulated gene expression was also significantly decreased in the caruncles during induced parturition. These results indicate that interferon signaling could be important for immunological control in placentomes during parturition. Additionally, this suggests that interferon-tau might be a pivotal ligand for interferon receptors in the caruncles. This study revealed that peripheral blood leukocytes in prepartum cows transcribed interferon-tau. Macrophage infiltration in the placentome is known to participate in the detachment of the fetal membrane from the caruncle. Thus, this study raised the possibility that immune cells migrating into the caruncles at parturition may act as a source of ligands that activate interferon signaling.</p>
DOI： 10.1262/jrd.2021-094
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Development and characterization of ten novel microsatellite loci for the emu (Dromaius novaehollandiae) and genetic diversity of Japanese farm populations Reviewed International journal
Yuichi Koshiishi, Michiko Murata‑Okubo, Shin‑ichiro Fujisawa, Gaku Shimoi, Hiroki Hirayama, Yuichi Kameyama, Kousaku Souma, Kenta Wada
Molecular Biology Reports 20200221 2020.02
Language：English Publishing type：Research paper (scientific journal)
The emu (Dromaius novaehollandiae) is a useful poultry animal farmed for fat, meat, and eggs. Genetic structure and relationships among farmed emu populations in Japan are unknown and the number of microsatellite markers for genetic analysis of the emu is insufficient. In this study, we isolated 16 microsatellites from the emu genome and developed ten new microsatellite markers. These microsatellite markers were used to characterize three farm emu populations in Japan. The number of alleles ranged from 3 to 13 and the expected (HE) and observed heterozygosity (HO) of these microsatellite loci
was 0.187–0.802 and 0.179–0.647, respectively. The polymorphic information content ranged from 0.176 to 0.786. Positive inbreeding coefficient (FIS) values were detected in all tested populations, and they ranged from 0.027 to 0.540. These results suggest that farm populations of the emu in Japan resulted from inbreeding. The fixation index (FST) values ranged from 0.026 to 0.061, and phylogenetic trees and population
structure analysis confirmed no definitive genetic differentiation among the three populations. Therefore, these populations are at a relatively low level of genetic differentiation at present. The microsatellite markers developed in our study can be utilized for genetic analysis and preservation of genetic resources
in the emu. -
Mitochondrial DNA variations in Japanese farmed emu populations
KOSHIISHI Yuichi, UKITA Misuzu, MURATA-OKUBO Michiko, FUJISAWA Shin-ichiro, SHIMOI Gaku, HIRAYAMA Hiroki, KAMEYAMA Yuichi, SOUMA Kousaku, WADA Kenta
Journal of Veterinary Medical Science 82 ( 6 ) 731 - 734 2020
Language：English Publisher：JAPANESE SOCIETY OF VETERINARY SCIENCE
<p>The emu (<i>Dromaius novaehollandiae</i>) is a new poultry. In this study, we investigated the haplotype composition of mitochondrial DNA among emu populations farmed in Japan. We sequenced the D-loop region in 109 individuals, and detected four substitution sites and three haplotypes (Hap-a, -b, and -c). Hap-a was the most frequently observed haplotype in the Japanese populations. Although Hap-c was a rare haplotype in not only Japanese but also Australian populations, it was detected with high frequency in the Japanese farmed population. The AMOVA indicated that 9% of total variance was “among population”. The <i>F</i><sub>ST</sub> value was 0.087 and genetic differentiation was significant (<i>P</i><0.01). These results may contribute to conserving the genetic resources available for the Japanese emu industry.</p>
DOI： 10.1292/jvms.19-0693
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エミューの飼養とエミュー肉を利用した肉製品の製造 Invited
中澤洋三,相馬幸作
食肉の科学 60 ( 1 ) 87 - 92 2019.11
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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Fermentation quality and nutritive value of the silage prepared from potato pulp and wheat bran Invited Reviewed
Michiko OKUBO, Kouki HARA, Yuichi MIYAGI, Takayoshi MASUKO, Kousaku SOUMA
7 17 - 24 2019.03
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Estimation of the dry matter and crude protein intakes Yeso sika deer (Cervus nippon yesoensis) on the pasture in the Shiretoko Ezoshikafarm Reviewed
Michiko OKUBO, Hiroaki SHIMIZU, Takuya SEKIZAWA, Yoshiki TSUCHIDA, Masaaki TOMITA, Masaaki HANADA, Takayoshi MASUKO, Kousaku SOUMA
7 25 - 29 2019.03
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Changes in Water Soluble Carbohydrates Content of Timothy (Phleum pratense L.) in Pastures of TMR Centers over 4 Years Reviewed
Michiko Okubo, Daisuke Takahashi, Fumiya Abe, Hideshi Shinoda, Kenzaburo Deguchi, Norie Shio, Takayoshi Masuko, Kousaku Souma
American Journal of Plant Sciences 10 276 - 284 2019.01
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Chemical characterization of the milk oligosaccharides of some Artiodactyla species including giraffe (Giraffa camelopardalis), sitatunga (Tragelaphus spekii), deer (Cervus nippon yesoensis) and water buffalo (Bubalus bubalis)
Mineguchi Y,Miyoshi M,Taufik E,Kawamura A,Asakawa T, Suzuki I,Souma K,Okubo M,Saito T,Fukuda K
Glycoconjugate Journal 35 561 - 574 2018.12
Language：English Publishing type：Research paper (scientific journal)
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Data on chemical compositions and fermentation quality of silages made from lowmarket- value vegetables supplemented with potato protein concentrate, a byproduct of starch production Reviewed
Michiko Okubo, Kazunari Sato, Shunsuke Matsuda, Takayoshi Masuko, Kousaku Souma
Data in Brief 21 1829 - 1832 2018.11
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Sex and diffrence in feed intake, weight gain, and feeding performance on Short-term rearing Yeso sika deer (Cervus nippon yesoensis) captured in the wild Reviewed
Kousaku souma, Maki Hayashida, Hirofumi Kudo, Kazuki Sugo, Takemichi Irabu, Keisuke Tojo, Takayoshi Masuko
Nihon Chikusan Gakkaiho 86 ( 3 ) 367 - 374 2015.08
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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First detection of adiaspiromycosis in the lungs of a deer
Kazuya MATSUDA,Hinako NIKI,Airo YUKAWA,Mitsuhiro YANAGI,Kousaku SOUMA,Takayoshi MASUKO,Hiroyuki TANIYAMA
Journal of Veterinary Medical Science 77 981 - 983 2015.08
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.1292/jvms.15-0083
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Sex and age differences in meat composition of Yeso sika deer (Cervus nippon yesoensis) reared for a short period after capture in the wild Reviewed
Maki Hayashida, Kousaku Souma, Kazuki Sugo, Shin-ichi Araki, Fumiaki Ishizuka, Masami Ueda, Takamasa Kasai, Takayoshi Masuko
Animal Science Journal 86 207 - 213 2015.02
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
北海道阿寒湖周辺で冬季に生体捕獲したエゾシカを、東京農業大学エゾシカ飼育施設に移送し、8～10ヵ月間飼育した満1歳の雌雄鹿6頭および満2歳以上（成獣）の雌雄鹿6頭を解体処理し、ロース肉の一般成分含量、ミネラル含量および脂肪酸組成を測定した。生体捕獲後短期飼育したエゾシカのロース肉の一般成分含量とミネラル含量、脂肪酸組成において性別あるいは年齢別による有意差が認められたのはミネラル含量のみであった。
DOI： 10.1111/asj.12274
Other Link： http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1740-0929
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Fermentation quality, nutritive value and nutrient intake by sheep of substandard carrot silage supplemented with wheat bran Reviewed
Kousaku Souma, Koji Kaneta, Takayoshi masuko
Hokkaido Journal of Livestock and Grassland Science 2 73 - 77 2014.03
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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Feed preferences of emus (Dromaius navaehollandiae) on feeding by-products of crops and food processing Reviewed
Kousaku Souma, Sayaka Iwase, Koji Kaneshi, Masahiro Kodera, Ayami Fuseya, Takayoshi Masuko
Hokkaido Journal of Livestock and Grassland Science 2 85 - 91 2014.03
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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Meat production and nutrient composition in meat from the fawns born to captured wild female Yeso sika deer (Cervus nippon yesoensis) Reviewed
Maki Hayashida, Kousaku Souma, Hirofumi Kudo, Keisuke Tojo, Satoshi Ikeda, Toshiyuki Fujimori, Tatsuhiko Ando, Takayoshi Masuko
Hokkaido Journal of Livestock and Grassland Science 2 79 - 84 2014.03
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Effects of Potassium Fertilizer on Water-Soluble Carbohydrate Content of Timothy (Phleum pratense L.), Silage Fermentation, Nutritive Values, and Nutrient Intake Reviewed
Peng Wang, Kousaku Souma, Hideki Okamoto, Satomi Kin, Akane Sugita, Akihiro Furudate, Chihiro Sato, Akio Nibe, Yimin Cai, Takayoshi Masuko
American Journal of Plant Sciences, 5 ( 7 ) 1030 - 1038 2014.03
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
生産現場で課題となっている牧草地土壌の高カリウム施肥の影響に着目し、カリウムを標準施肥あるいは高水準施肥で栽培したチモシーを用い、牧草中のWSC含量の変化、乳酸菌製剤の添加効果について検討し報告した。
Other Link： http://www.scirp.org/journal/AJPS/
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Effect of timing of shipment on composition of meat from captured female wild Yeso sika deer (Cervus nippon yesoensis) Reviewed
Maki Hayashida, Kousaku Souma, Makoto Hsanaga, Reiko Sawada, Shingo Tamai, Yasuhiro Morisaki, Nao Nishigaki, Asuka Noda, Takao Myoda, Takayoshi Masuko
Hokkaido Journal of Livestock and Grassland Science 1 55 - 61 2013.03
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)