Study on inbreeding degeneration in Japanese pear by using S2 progeny originated from Osa Nijisseiki having self-compatibility

2013 Fiscal Year Final Research Report

• Project/Area Number: 23658023
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Horticulture/Landscape architecture
• Research Institution: Ibaraki University
• Principal Investigator: INOUE Eiichi 茨城大学, 農学部, 准教授 (90292482)
• Research Collaborator: KASUMI Masakazu 茨城県農業総合センター, 生物工学研究所, 室長(協力時) ; GONAI Takeru 茨城県農業総合センター, 生物工学研究所, 主任研究員(協力時)
• Project Period (FY): 2011 – 2013
• Keywords: ニホンナシ / 自家和合性 / SSRマーカー / 近交弱勢 / ホモ化 / 劣性形質

Research Abstract

Almost all fruits trees including Japanese pear have self-incompatibility. In this research, to study inbreeding degeneration, we produced self-pollinated progeny of Japanese pear by using self-compatible cultivar Osa Nijisseiki. The negative correlation observed between the homo-zygosity and plant height in S2 individuals reflected a negative effect of the homogeneity on their growth. This S2 progeny may become valuable material for the genomic research about the inbreeding degeneration in Japanese pear.

Research Products

• [Presentation] QTL controlling dots development of fruit skin in Japanese pear (2013)
  • Author(s): Eiichi Inoue
  • Organizer: Fruits and Roots: : a celebration and forward look
  • Place of Presentation: イーストモーリング,(連合王国)
  • Year and Date: 20131106-07
• [Presentation] S_2 progeny of Japanese pear (Pyrus pyrifolia Nakai)'Osa Nijisseiki' having self-compatibility and their homozygosity estimated by SSR analysis (2013)
  • Author(s): Eiichi Inoue
  • Organizer: 2013 American Society for Horticultural Science
  • Place of Presentation: パームデザート(アメリカ)
  • Year and Date: 20130722-25
• [Presentation] ニホンナシ果実のみつ症発生過程における組織学的観察 (2013)
  • Author(s): 小川達也,井上栄一, 他
  • Organizer: 園芸学会平成24年度春季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2013-03-29
• [Presentation] ニホンナシにおける果皮色形質を制御するQTL の検出 (2011)
  • Author(s): 井上栄一, 他
  • Organizer: 園芸学会平成23年度秋季大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2011-09-24
• [Remarks] シンポジウム開催『次世代シークエンサーとDNA 塩基配列情報の農業研究への展開-果樹ゲノム研究から品種識別まで-』,茨城大学農学部研究推進委員会,2010年2月26日,茨城大学農学部