The Japanese Journal of Genetics
Online ISSN : 1880-5787
Print ISSN : 0021-504X
ISSN-L : 0021-504X
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Volume 14, Issue 5
Displaying 1-4 of 4 articles from this issue
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  • GENETICAL AND CYTOLOGICAL PROOFS OF ATTACHED CHROMOSOMES IN BOMBYX MORI
    Yataro TAZIMA
    1938 Volume 14 Issue 5 Pages 191-203
    Published: 1938
    Released on J-STAGE: April 04, 2007
    DOIhttps://doi.org/10.1266/jjg.14.191
    JOURNAL FREE ACCESS
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    1) Between P and Psa, non-disjundtion occurs occasionally. In such cases, the union of two genes is so firm that they remain united permanently.
    2) A probable explanation of such hundred per cent non-disjunction is attachment of two second chromosomes. The validity of this explanation has been tested from genetical and cytological observations.
    3) It was assumed that in the attached strains crossing over occurs in the female with a frequency of 0.2-0.3%.
    4) A number of polyploid individuals were obtained during the course of this experiment.
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  • Transplantation of Optic Discs and Eye Colours in Bombyx Mori
    Seiziro MOROHOSI
    1938 Volume 14 Issue 5 Pages 204-210
    Published: 1938
    Released on J-STAGE: April 04, 2007
    DOIhttps://doi.org/10.1266/jjg.14.204
    JOURNAL FREE ACCESS
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    In Bombyx mori, as in Drosophila, larval optic discs could be successfully transplanted to different larval hosts. The results are summarized as follows:
    From my results, we may postulate the presence of the r+ substance in black type, in addition to the W(w+) substance whose existence has been postulated by KIKKAWA ('37) and KAWAGUCHI and KIN ('37, 38). The r+ substance acts only in the presence of W gene.
    Implanted eye discs usually show deeper pigmentation in the female hosts than in the male.
    During the course of this experiment some fragmental eyes were discovered. When the fragments are found in one host besides a seemingly entire eye, the former shows usually lighter color than the latter.
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  • Immunogenetische Studien bei den Rassenbastarden von taiwanischem Maskenschwein und Berkshire
    Jinshin YAMANE, Kisajiro OGURA, Noriyoshi MAKITA
    1938 Volume 14 Issue 5 Pages 211-232
    Published: 1938
    Released on J-STAGE: April 04, 2007
    DOIhttps://doi.org/10.1266/jjg.14.211
    JOURNAL FREE ACCESS
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    Das taiwanische Maskenschwein (jap. Tohen-Schlag) ist ein Nebenzweiglein des südchinesischen Maskenschweins. Es ist durch eigentümliche Hautfalten and Körperbildung ausgezeichnet. In der Schädelform lässt es sich jedoch von Berkshire kaum unterscheiden; die beiden Rassen zeigen gleichfalls eine ausgeprägte Brachycephalie und besitzen ein hohes kurzes Tranenbein von vittatus-Typus (Textfig. 1). Auch in der Abstammung sind die beiden Schweinerassen miteinander sehr nahe verwandt, da das Berkshireschwein bei seiner Veredelung mit südchinesischem Schwein gekreuzt wurde.
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  • Cytological Basis of Sex Difference in Crossing-Over
    T. Maeda
    1938 Volume 14 Issue 5 Pages 233-237
    Published: 1938
    Released on J-STAGE: April 04, 2007
    DOIhttps://doi.org/10.1266/jjg.14.233
    JOURNAL FREE ACCESS
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