Sanshi-Konchu Biotec
Online ISSN : 1884-7943
Print ISSN : 1881-0551
ISSN-L : 1881-0551
Volume 79 , Issue 1
Showing 1-3 articles out of 3 articles from the selected issue
  • Satoshi Murakami, Takuma Iwamatsu, Yu Kitamura, Yuta Kitazawa, Miyuki ...
    2009 Volume 79 Issue 1 Pages 1_53-1_59
    Published: 2009
    Released: August 16, 2011
    JOURNALS FREE ACCESS
    The lifespan of the imago in the silkworm, Bombyx mori, was considered to be around one week. We have investigated the lifespan in imago and the distributions of the number of dead individuals per day using 22 silkworm strains maintained in Tokyo University of Agriculture and Technology to examine any hereditary factors. The average lifespan in imago was 2.14-12.42days, and significant differences among strains were noted. There were lifespan differences among local varieties; average lifespan in imago of Japanese strains were slightly shorter than European and Chinese strains. Histograms of death frequency were classified into the three peak patterns of one clear peak, no clear peaks and one sharp peak in short lifespan in imago. In all five investigated Japanese strains, the graphs showed one clear peak. These results suggested the intervention of some genes in the lifespan.
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