「新大1号」「新大5号」におけるスギ雄性不稔性の発現過程と遺伝的特性  [in Japanese] Cytological and Genetical Studies on Male Sterile Sugi (Cryptomeria japonica D. Don), Shindai 1 and Shindai 5  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 吉井 エリ YOSHII E.
    • 新潟大学大学院自然科学研究科 Graduate School of Science and Technology, Niigata University
    • 平 英彰 TAIRA H.
    • 新潟大学大学院自然科学研究科 Graduate School of Science and Technology, Niigata University

Abstract

新潟県内で選抜したスギ雄性不稔個体(新大1号,新大5号)の小胞子形成過程と遺伝様式を明らかにするとともに,富山不稔個体(富山MS)との差異について検討した。新大1号,新大5号の雄花および針葉の形態は正常個体と同じであった。しかし,形成された小胞子は,どちらも正常に発達せず,収縮して互いに癒着し,花粉飛散期には塊状となった。新大1号,新大5号の小胞子の退化過程はそれぞれ異なるとともに,小胞子が膨張し退化する富山MSとも異なった。新大1号,新大5号のF<SUB>1</SUB>苗は全て正常な花粉を形成したが,F<SUB>2</SUB>苗では正常個体と不稔個体が3:1に分離した。新大1号の戻し交配苗では,正常個体と不稔個体が1:1に分離した。また,新大1号と富山MSのF<SUB>1</SUB>および,新大5号と富山MSのF<SUB>1</SUB>,および新大5号と新大1号のF<SUB>1</SUB>との交配によって得られた苗のすべてが,正常な花粉を形成した。このことから,新大1号,新大5号,富山MSは,それぞれ異なる一対の核内劣性遺伝子に支配された雄性不稔性であると判断された。

Male sterile sugi (<I>Cryptomeria japonica</I> D. Don) trees, “Shindai 1,” “Shindai 5,” were found in Niigata Prefecture, Japan. There were no significant differences in the appearances of male flowers and needles between these trees and the common wild type. We investigated the cyiological characteristics and inheritance of the male sterility trait in Shindai 1 and Shindai 5. We also determined the differences between Shindai 1, Shindai 5 and another male sterile tree, “Toyama MS”. Microsporogenesis in Shindai 1 and Shindai 5 produced normal microspores, but the microspores began to contract and clump. In the pollen dispersal season, the microspores agglomerated. Degeneration of microspores in Shindai 1 and Shindai 5 are different each others and also differ from that in Toyama MS in which microspores collapsed after expansion. All F<SUB>1</SUB> seedlings obtained from Shindai 1 and Shindai 5 produced pollen in male flowers, but F<SUB>2</SUB> seedlings segregated into 75% fertile and 25% sterile seedlings. Backcrossed seedlings obtained from Shindai 1 segragated into 50% fertile and 50% sterile seedlings. Moreover, seedlings obtained from a cross of Shindai 1 and Toyama MS F<SUB>1</SUB>, Shindai 5 and Toyama MS F<SUB>1</SUB>, Shindai 5 and Shindai 1 F<SUB>1</SUB> had only fertile male flowers. The male sterility trait in Shindai 1 and Shindai 5 are nuclear sterility controlled by a pair of recessive genes, and the male sterility in Shindai 1 and Shindai 5 are controlled by a different genetic mechanism than in Toyama MS.

Journal

  • Journal of the Japanese Forest Society

    Journal of the Japanese Forest Society 89(1), 26-30, 2007-02-01

    Japanese Forestry Society

References:  22

Cited by:  3

Codes

  • NII Article ID (NAID)
    110006882849
  • NII NACSIS-CAT ID (NCID)
    AA12003078
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13498509
  • NDL Article ID
    8775100
  • NDL Source Classification
    ZR21(科学技術--農林水産--林産)
  • NDL Call No.
    Z18-340
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
Page Top