The Japanese Journal of Genetics

Online ISSN : 1880-5787
Print ISSN : 0021-504X
ISSN-L : 0021-504X

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Volume 20, Issue 4-6

Displaying 1-8 of 8 articles from this issue

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Chromosome studies in the Coleoptera

I. A study of chromosomes in ten species of Coccinellidae and Chrysomelidae

Tosihide YOSIDA

1944 Volume 20 Issue 4-6 Pages 107-115
Published: 1944
Released on J-STAGE: May 25, 2007

DOIhttps://doi.org/10.1266/jjg.20.107

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In the pr sent study the chromosomes of seven species of the Coccinellidae and three species of the Chrysomelidae were reported upon with special regard to the morphological analysis of the chromosomes from the comparative viewpoint. The species under investigation and their chromosome numbers here established are given in the annexed table (Table 1). The relation between the species and the chromosomal constitution was the main subject to be considered in this study. The occurrence of the multiple X-chromosome was suggested in a species of the Chrysomelidae, Luperus discrepans.

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Species and race in higher animals considered from the cytological standpoint

Yoshimaro YAMASHINA

1944 Volume 20 Issue 4-6 Pages 116-126
Published: 1944
Released on J-STAGE: May 25, 2007

DOIhttps://doi.org/10.1266/jjg.20.116

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Sex-chromosome of Phyllospadix

Ititaro HARADA

1944 Volume 20 Issue 4-6 Pages 127-128
Published: 1944
Released on J-STAGE: May 25, 2007

DOIhttps://doi.org/10.1266/jjg.20.127

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On meiotic chromosomes in the genus Crocus

Kotaro KARASAWA

1944 Volume 20 Issue 4-6 Pages 128-130
Published: 1944
Released on J-STAGE: May 25, 2007

DOIhttps://doi.org/10.1266/jjg.20.128

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Chromosome number of Ophipogon planiscapus Nakai

Tomoe OINUMA

1944 Volume 20 Issue 4-6 Pages 130-131
Published: 1944
Released on J-STAGE: May 25, 2007

DOIhttps://doi.org/10.1266/jjg.20.130

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Cytological studies of Helwingia japonica Willd

Goichi NAKAJIMA

1944 Volume 20 Issue 4-6 Pages 131-132
Published: 1944
Released on J-STAGE: May 25, 2007

DOIhttps://doi.org/10.1266/jjg.20.131

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Cytological investigations in Helwingia rusciflora (=japonica) were made by Dermen (1932) and Wanscher (1933a). According to the former author, the somatic number of chromosomes is 80, while the latter reported 72 and 144 as the somatic numbers in the materials obtained from the Copenhagen Botanic garden and the Edinburgh garden respectively.
The present writer observed 60 bivaleuts in the polar view of heterotypic metaphase in pollen mother cells of the male plants. The gemini are similar in size and shape (Fig. 2). In the side view of the hetorotypic metaphase, an unequal pair of chromosomes consisting of two members of different size was observed (Fig. 3), indicating sex chromosomes of the XY type.

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Genetische Studies über die Jodjodkalifarbenreaktion bei den Rejskörnern

Seijin NAGAO, Man-Emon TAKAHASHI

1944 Volume 20 Issue 4-6 Pages 133-135
Published: 1944
Released on J-STAGE: May 25, 2007

DOIhttps://doi.org/10.1266/jjg.20.133

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A contribution to the study of chromosomes in animals, especially in the Muridae

Prize Lecture

Sajiro MAKINO

1944 Volume 20 Issue 4-6 Pages 136
Published: 1944
Released on J-STAGE: May 25, 2007

DOIhttps://doi.org/10.1266/jjg.20.136

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