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1999 Fiscal Year Final Research Report Summary

Inheritance of morphological and physiological characters in the inter-subspecific cross between Samia cynthia ricini and S. c. pryeri.

Research Project

Project/Area Number 10660054
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 蚕糸・昆虫利用学
Research InstitutionThe University of Tokyo

Principal Investigator

SHIMADA Toru  The University of Tokyo, Graduate School of Agricultural and Life Sciences, Associate Professor, 大学院・農学生命科学研究科, 助教授 (20202111)

Project Period (FY) 1998 – 1999
KeywordsSamia cynthia ricini / Samia cynthia pryeri / Diapause / Cold torelance / Sex determination / Trehalose / Supercooling point / Chromosome
Research Abstract

The F1 hybrids were obtained from a cross between Samia cynthia pryeri ♀× Samia cynthia ricini ♂. The F1 female pupae did not enter diapause, whereas most of the F1 male pupae enter diapause, suggesting that the pupal diapause nature is inherited in a sex linked manner. In the backcross progeny, the pupal diapause seemed to be sex linked. In F1 and B1 generations, the pupae did not show diapause under a long day photoperiod. The diapausing pupae of S. c. pryeri and the F2 hybrids were incubated at 4℃ vs. 25℃ for 100 days, and their trahalose content and supercooling point in the hemolymph were measured comparatively. In 25℃- and 4℃-incubated pupae of S. c. pryeri, the trehalose content was 15mg/ml and 34mg/ml, respectively. In 25℃- and 4℃-incubated pupae in the F2 generation, it was 14mg/ml and 18mg/ml (average), respectively. In 4℃-incubated pupae in the F2, trehalose content varied from 5 to 37 mg/ml among individuals. The supercooling point was -27℃ in the 25℃-incubated pupae and -21℃ at 4℃-incubated ones, in average. No correlation was observed between the supercooling point and trahalose content in F2 individuals.
Based on my observation of the backcross progenies, it was clarified that the green skin color in S. c. pryeri was controlled by a dominant gene on an autosome. The black spots on the skin of S. c. pryeri was also controlled by a dominant gene on another autosome. The cocoon of S. c, pryeri was brown. The cocoon color was segregated in the B1 generation, and various kind of colors were observed. Some genetical analyses led me to explain the cocoon color by a model ; A gene(s) and another gene(s) control a red pigment and a gray pigment, respectively.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Masataka G. Suzuki, Tomoko Terada, Masahiko Kobayashi, Toru Shimada: "Diapause-associated transcription of BmEts, a gene encoding as ETS transcription factor homolog in Bombyx mori"Insect Biochemistry and Molecular Biology. 29・4. 339-347 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toru Shimada: "Genetic mapping of virus resistances in Bombyx mori and B. mandarina"RIKEN Review. 22. 68-71 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 嶋田透: "カイコの生殖と休眠を支配する遺伝子ネットワーク"第19回基礎育種学シンポジウム報告(学術会議育種学研連). 19(印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 嶋田 透: "絹糸昆虫におけるゲノムの進化"Japanese Journal of Biometrics(日本計量生物学会). 19. 15-27 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿部 靖,永田昌男,小林正彦,野口洋子,清水 治,嶋田 透: "エリサンとテンサンの核多角体病ウイルスにおける2遺伝子の塩基配列"野蚕 Wild Silkworm News. 39(印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 嶋田透: "エリサンとシンジュサンの交雑種における諸形質の遺伝"野蚕 Wild Silkworm News. 39(印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masataka G. Suzuki, Tomoko Terada, Masahiko Kobayashi Toru Shimada: "Diapause-associated transcription of BmEts, a gene encoding an ETS transcription factor homolog in Bombyx mori."Insect Biochemistry and Molecular Biology. 29(4). 339-347 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Shimada: "Genetic mapping of virus resistances in Bombyx mori and B."mandarina. RIKEN Review. 22. 68-71 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Shimada: "Genetic network controlling reproduction and diapause in the silkworm, Bombyx mori. Proceeding of the Symposium on Basic Breeding Science."No. 19 (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Shimada: "Evolution of the genomes in the silkmoths"Japanese Journal of Biometrics. 19. 15-27 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yasushi Abe, Masao Nagata, Masahiko Kobayashi, Yoko Noguchi, Osamu Shimizu, and Toru Shimada: "Nucleotide sequences of two genes in nuclear polyhedrosis viruses in Samia cynthia ricini and Antheraea yamamai"Wild Silkworm News. No. 39 (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Shimada: "Inheritance of morphological and physiological characters in the inter-subspecific cross between Samia cynthia ricini and S. c. pryeri"Wild Silkworm News. No. 39 (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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