Cross talk pathways between stress tolerance and promotion of flowering

• Project/Area Number: 24580003
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Breeding science
• Research Institution: Iwate University
• Principal Investigator: YOKOI SHUJI 岩手大学, 農学部, 准教授 (80346311)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: ストレス / 開花 / シグナル伝達 / イネ / シロイヌナズナ / 植物育種学 / 育種学 / 相転移

Outline of Final Research Achievements

The effect on flowering is most important strategies in plant life cycle. To improve the environmental stress tolerance of plants, I have been to use rice and Arabidopsis. According to my research, two genes may be involved in early flowering pathway by stress in Arabidopsis. I identified a novel allele of Ehd2 from Mutmap analysis and I found that Ehd2 might have a function for temperature-dependent flowering signal in rice.

Research Products

• [Journal Article] Draft Sequences of the Radish (Raphanus sativus L.) Genome. (2014)
  • Author(s): Kitashiba H, Li F, Hirakawa H, Kawanabe T, Zou Z, Hasegawa Y, Tonosaki K, Shirasawa S, Fukushima A, Yokoi S, Takahata Y, Kakizaki T, Ishida M, Okamoto S, Sakamoto K, Shirasawa K, Tabata S, and Nishio T
  • Journal Title: DNA Research Volume: 21 Pages: 481-490
  • Peer Reviewed
• [Journal Article] A naturally occurring long insertion in the first intron in the Brassica rapa FLC2 gene causes delayed bolting. (2014)
  • Author(s): Kitamoto N, Yui S, Nishikawa K, Takahata Y and Yokoi S
  • Journal Title: Euphytica Volume: 196 Issue: 2 Pages: 213-223
  • DOI: 10.1007/s10681-013-1025-9
  • Peer Reviewed
• [Journal Article] Change of shoot architecture during juvenile-to-adult phase transition in soybean. (2013)
  • Author(s): Yoshikawa T, Ozawa S, Sentoku N, Itoh JI, Nagato Y, Yokoi S.
  • Journal Title: Planta Volume: 238 Issue: 1 Pages: 229-237
  • DOI: 10.1007/s00425-013-1895-z
  • Peer Reviewed
• [Journal Article] Analysis of the morphological and anatomical characteristics of roots in three radish (Raphanus sativus) cultivars that differ in root shape. (2012)
  • Author(s): Zaki HEM, Takahata Y and Yokoi S
  • Journal Title: Journal of Horticultural Science & Biotechnology Volume: 87 Pages: 172-178
  • Peer Reviewed
• [Journal Article] Effects of genotypes and culture conditions on microspore embryogenesis and plant regeneration in several subspecies of Brassica rapa L. (2012)
  • Author(s): Takahashi Y, Yokoi S and Takahata Y
  • Journal Title: Plant Biotechnology Reports Volume: 6 Pages: 297-304
  • Peer Reviewed
• [Presentation] ダイズにおけるJuvenile-Adult相転換期の多様性 (2015)
  • Author(s): 小澤傑・高畑義人・横井 修司
  • Organizer: 第127回日本育種学会
  • Place of Presentation: 玉川大学（東京）
  • Year and Date: 2015-03-21 – 2015-03-22
• [Presentation] 長日要求性素材つけな中間母本農２号(Brassica rapa)における極晩抽性とBrSPA4との関連性 (2015)
  • Author(s): 北本 尚子・由比 進・西川 和裕・高畑 義人・横井 修司
  • Organizer: 第127回日本育種学会
  • Place of Presentation: 玉川大学（東京）
  • Year and Date: 2015-03-21 – 2015-03-22
• [Presentation] 第9染色体に座乗するイネの新規出穂期関連遺伝子の解析 (2014)
  • Author(s): 吉津 祐貴・高畑 義人・*横井 修司
  • Organizer: 第126回日本育種学会
  • Place of Presentation: 南九州大学（都城）
  • Year and Date: 2014-09-26
• [Presentation] ダイズのJuvenile-Adult相転換を制御する因子の解析 (2014)
  • Author(s): 小澤 傑 ・高畑 義人・横井 修司
  • Organizer: 第32回日本植物細胞分子生物学会
  • Place of Presentation: アイーナ（盛岡）
  • Year and Date: 2014-07-21 – 2014-07-22
• [Presentation] Identification of a novel allele of Early heading date 2 that encodes flowering promotion gene in rice. (2014)
  • Author(s): Yoshitsu Y, Takagi H, Natsume S, Yaegashi H, Abe A, Terauchi R and Yokoi S
  • Organizer: Plant Biology 2014
  • Place of Presentation: Portland, USA
  • Year and Date: 2014-07-12 – 2014-07-16
• [Presentation] MutMap+法を用いたイネ開花促進遺伝子Ehd2新規アリルの同定 (2014)
  • Author(s): 吉津 祐貴・高木 宏樹・夏目 俊・八重樫 弘樹・寺内 良平・高畑 義人・横井 修司
  • Organizer: 第１２５回日本育種学会
  • Place of Presentation: 東北大学（宮城県）
• [Presentation] 日長感受性を失ったイネ晩生変異体の開花機構の解析 (2013)
  • Author(s): 吉津 祐貴・高畑 義人・横井 修司
  • Organizer: 第１２４回日本育種学会
  • Place of Presentation: 鹿児島大学（鹿児島県）
• [Presentation] QTL analysis of bolting time in radish (Raphanus sativus L.) based on SNP markers. (2012)
  • Author(s): Yokoi S, Furuyama Y, Takahashi M, Aoki W, Takahashi Y, Ebina S, Mimida N and Takahata Y
  • Organizer: 18th Crucifer Genetics Workshop (Brassica 2012)
  • Place of Presentation: Woodward Centre, University of Melbourne, Australia
  • Invited
• [Presentation] Genes controlling flowering time in Arabidopsis, Brassica, and Raphanus. (2012)
  • Author(s): Yokoi S
  • Organizer: Comparative Genomics and Breeding of Brassicaceae Crops
  • Place of Presentation: International Center, Sendai, Japan
  • Invited
• [Presentation] ダイズのjuvenile-adult相転換を制御する因子の解析
  • Author(s): 小澤 傑・吉川 貴徳・長戸 康郎・高畑 義人・横井 修司
  • Organizer: 第7回東北育種研究集会
  • Place of Presentation: 弘前大学（青森県）