Evolutionary ecology on red algal apomixis and heterosis

2009 Fiscal Year Final Research Report

• Project/Area Number: 19570092
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Fukui Prefectural University
• Principal Investigator: KAMIYA Mitsunobu Fukui Prefectural University, 海洋生物資源学部, 准教授 (00281139)
• Research Collaborator: WEST John A. Melbourne University
• Project Period (FY): 2007 – 2009
• Keywords: 海藻 / 無配生殖 / 世代交代 / 交雑 / 異数倍数体

Research Abstract

Genetic analyses and crossing tests were performed using euryhaline red alga Caloglossa leprieurii isolated worldwide, and the following results were obtained : (1) Apomixis occurred several times in the C.leprieurii lineages ; (2) 13 out of 18 apomictic strains were heterogeneous, and the strains from Florida and Australia were allotriploid ; (3) The homogeneous apomicts frequently produced tetraspores that grew into gametophytes ; (4) Obligate apomixis was generated through the outcrossing between the genetically divergent sexual strains.

Research Products

• [Journal Article] Isolation and characterization of Parmales (Heterokonta/Heterokontophyta/Strameno piles) from the Oyashio region, western north Pacific. (2010)
  • Author(s): Ichinomiya, M., Yoshikawa, S., Kamiya, M., Ohki, K., Kuwata, A.
  • Journal Title: J. Phycol. (in press)
  • Peer Reviewed
• [Journal Article] Seasonal variation of phlorotannin in sargassacean species from the coast of the Sea of Japan. (2010)
  • Author(s): Kamiya, M., Nishio, T., Yokoyama, A., Yatsuya, K., Nishigaki, T., Yoshikawa, S., Ohki, K.
  • Journal Title: Phycol. Res. 58 Pages: 53-61
  • Peer Reviewed
• [Journal Article] Origin of apomictic red algae: outcrossing studies of different strains in Caloglossa monosticha (Ceramiales, Rhodophyta). (2008)
  • Author(s): Kamiya, M., West, J.A.
  • Journal Title: J. Phycol. 44 Pages: 977-984
  • Peer Reviewed
• [Journal Article] Morphological and phylogenetic studies on unicellular diazotrophic cyanobacteria (Cyanophytes) isolated from the coastal waters around Singapore. (2008)
  • Author(s): Ohki, K., Kamiya, M., Honda, D., Kumazawa S., Ki Ho, K.
  • Journal Title: J. Phycol. 44 Pages: 142-151
  • Peer Reviewed
• [Journal Article] Ten Years' Monitoring of Intertidal Macroalgal Vegetation of Hyogo Prefecture, Northwestern Coast of Honshu, Japan to Assess the Ompact of the Nakhodka Oil Spill. (2007)
  • Author(s): Kawai, H., Kamiya, M., Komatsu, T., Nakaoka, M., Yamamoto, T., the Marine Life Research Group of Takeno
  • Journal Title: Algae 22(1) Pages: 1-10
  • Peer Reviewed
• [Presentation] Tetraspore-recycling hybrid derived from the outcrossing between genetically distant strains of Caloglossa leprieurii (Ceramiales, Rhodophyta). (2009)
  • Author(s): Kamiya, M., West., J.A.
  • Organizer: 9th International Phycological Congress
  • Place of Presentation: Tokyo
  • Year and Date: 2009-08-05
• [Presentation] 広塩性紅藻Caloglossa leprieuriiの無配生殖集団の起源. (2008)
  • Author(s): 神谷充伸・West, J.A.
  • Organizer: 平成20年度日本進化学会
  • Place of Presentation: 東京
  • Year and Date: 2008-08-22
• [Book] Investigations on reproductive affinities in red algae. Red algae in the genomic age. ( Seckbach, J. & Chapman, D. [eds]) (2010)
  • Author(s): Kamiya, M., West, J. A.
  • Total Pages: 495
  • Publisher: Springer, Berlin, Germany