The Japanese Journal of Genetics
Online ISSN : 1880-5787
Print ISSN : 0021-504X
ISSN-L : 0021-504X
Volume 12 , Issue 2
Showing 1-9 articles out of 9 articles from the selected issue
  • Y. Yamamoto
    1936 Volume 12 Issue 2 Pages 73-80
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
    Folgende getrenntgeschlechtige Pflanzen wurden nach der Vorschrift von Yamasaki (1933) untersucht:
    1. Rumex acetosa; _??_, _??_ (3A) und _??_,
    2. Aucuba japonica; _??_, _??_ und _??_,
    3. Fragaria elatior; _??_ und _??_,
    4. Tetraploider Bastard Fragaria nipponica×Fragaria elatior; _??_ und _??_ (vgl. Lilienfeld 1933).
    Die Ergebnisse der Versuche sind aus Tabellen I, II und III sowie Abb. 1-5 zu entnehmen.
    Bei Rumex und Aucuba wurden, wie in allen Versuchen von Yamasaki, die Weibchen viel mehr durch Kaliumchlorat beschädigt als die Männchen. Das Intersex von Rumex zeigte deutliche Zeichen von Beschädigung, im Gegensatz zu dem Intersex von Aucuba, das unbeeinflusst blieb. Es ist in diesem Zusammenhang beachtenswert, dass das Intersex von Rumex männlich gänzlich steril und weiblich schwach fertil ist, während es sich mit dem Aucuba-Intersex umgekehrt verhält.
    Bei Fragaria elatior wurde das entgegengesetzte Verhalten festgestellt: die Männchen wurden bedeutend mehr beschädigt als die Weibchen. Genau so verhielt sich der tetraploide Bastard F. nipponica×F. elatior. Da bei Fragaria das weibliche Geschlecht heterogametisch ist, ist es sehr verlokkend anzunehmen, dass nicht das Geschlecht an sich, sondern Homo-bzw. Heterogametie die Reaktion auf Kaliumchlorat bedinge. Solange aber keine andere weiblich heterogametische Phanerogame bekannt geworden ist, ist eine derartige Verallgemeinerung nicht zulässig.
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  • Goro FUKUOKA
    1936 Volume 12 Issue 2 Pages 81-88
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
    (1) The material consists of finger patterns of 303 sets of twins and 796 non-twin individuals.
    (2) For the classification of patterns, two different schemes have been adopted: the one according to the type of pattern, and other invented by Bonnevie which is based upon ridge-counting.
    (3) The result of ridge-counting shows that the coefficient of correlation between right and left hands of the same individual is substantially the same either in monozygotic or in dizygotic twins (nearly 0.9); the correlation between different individuals of the same set of monozygotic twins is nearly 0.9, while it is only 0.4 in dizygotic twins.
    (4) The number of ridges seems to be determined by multiple factors which show neither complete dominance nor complete recessiveness. Also a sex-linked factor seems to take part.
    (5) The heredity is less marked as to the type of pattern.
    (6) There is no evidence for the inheritance of the tendency to form a radial loop.
    (7) The tendency to twist (to form composite pattern) and the tendency to form elongate or circular pattern seem to be inherited, but the mode is difficult to determine in either case.
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  • T. H. Oka
    1936 Volume 12 Issue 2 Pages 89-92
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
    Forty heteroploid tomatoes arised out of five hundred seeds, which were obtained from the regenerated tetraploids produced by the decapitation-method. They could be already noticed in the seedling stage for the slowness of germination and the abnormality of cotyledons. The dwarfness and bushy form are two remarkable characteristics of the mature plants and their fruit-setting is very rare or none. The somatic chromosome numbers of the heteroploid plants so far examined are 49, 50, 51, 52, 53, and 54; namely 4n+1, 4n+2, 4n+3, 4n+4, 4n+5 and 4n+6 respectively. The heteroploidy may be caused by the gamates, which have super diploid chromosome numbers on the consequence of irregular division of pollen mother cells in the tetraploid tomatoes.
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  • S. Nakamura
    1936 Volume 12 Issue 2 Pages 93-96
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
    1. Among the Japanese some individuals have‘single’eye-lids, while others have‘double’eye-lids. This difference occurs according as the lower edge of the fold of the eye-lid reaches beyond the margin of the real lid, or falls short of the latter. Statistical examination of 1340 males and 1765 females shows that in males the frequency of the single eye-lid exceeds that of the double eye-lid only slightly, while in females just the reverse is the case (the frequency of double eye-lids in percentage-male 45.22, female 53.09).
    2. A number of pedigrees collected indicate that this character is determined by a set of Mendelian factors, the factor for the double eye-lid behaving, as a dominant to the factor for the single eye-lid.
    3. The manifestation of the character is subject to some degree of irregularity, besides being sex-controlled. In general, the male has a tendency to have single eye-lids, while the female is more apt to acquire double eye-lids.
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  • H. Kichijo
    1936 Volume 12 Issue 2 Pages 97
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
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  • T. Ikemi
    1936 Volume 12 Issue 2 Pages 98-100
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
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  • R. Yamazaki
    1936 Volume 12 Issue 2 Pages 101-103
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1936 Volume 12 Issue 2 Pages 104a
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
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  • S. Matsumura
    1936 Volume 12 Issue 2 Pages 104-106
    Published: 1936
    Released: November 30, 2007
    JOURNALS FREE ACCESS
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