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Volume 7 (1931 - 1932･･･
- Issue 4 Pages 153-
- Issue 3 Pages 121-
- Issue 1-2 Pages 1-
Volume 7, Issue 4
Displaying 1-13 of 13 articles from this issue
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K. NAKAYAMA1932 Volume 7 Issue 4 Pages 153-160
Published: 1932
Released on J-STAGE: November 30, 2007
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K. NAKAYAMA1932 Volume 7 Issue 4 Pages 161-171
Published: 1932
Released on J-STAGE: November 30, 2007
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K. GOTOH1932 Volume 7 Issue 4 Pages 172-182
Published: 1932
Released on J-STAGE: November 30, 2007
JOURNAL FREE ACCESSTwo new chromosome numbers, 9 and 10, were added in Secale cereale L. The extra chromosomes of these plants must represent the k-chromosome of the 8-chromosome rye. Such plants arose probably from 8-chromosome plants through duplication of the k-chromosome. These chromosomes form sometimes multivalent associations.
Such a chromosome multiplication disturbs the balance in the cell and weakens the viability of both, germ cells and zygotes, which accordingly show high sterility.
Crossings between the 7- and the 8-chromosome rye have been carried out. The FI-plants had for the most part either 14 or 16 somatic chromosomes. The former number will be obtained when the two segments _??_ and _??_ reunite into the original chromosome _??_. The latter number will be easily produced through segmentation of the original chromosome into _??_ and _??_. Moreover two plants with 7II+ 1I have been found. They may have resulted from a non-disjunction of the two k-chromosomes in the 8-chromosome parent.
Thus crossing experiments have confirmed the assumption proposed in my previous paper (GOTOH 1924) that 8-chromosome plants arose from 7-chromosome ones through transversal segmentation into two of both members of the longest bivalent. Such fragmentation, and on the other hand rejunction of the two fragments, takes probably place in the first division after fertilisation.
LEVITSKY's (1930) 8-chromosome rye is discussed. The author assumes that in this case probably a secondary 8-chromosome rye was involved.View full abstractDownload PDF (451K) -
[in Japanese]1932 Volume 7 Issue 4 Pages 183-185
Published: 1932
Released on J-STAGE: November 30, 2007
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[in Japanese], [in Japanese]1932 Volume 7 Issue 4 Pages 186-187
Published: 1932
Released on J-STAGE: November 30, 2007
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[in Japanese]1932 Volume 7 Issue 4 Pages 188-193
Published: 1932
Released on J-STAGE: November 30, 2007
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I. Chromosomes in Tricyrtis. (Preliminary note)Y. SINOTO, R. KIKKAWA1932 Volume 7 Issue 4 Pages 194-198
Published: 1932
Released on J-STAGE: November 30, 2007
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[in Japanese]1932 Volume 7 Issue 4 Pages 199-200
Published: 1932
Released on J-STAGE: November 30, 2007
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[in Japanese]1932 Volume 7 Issue 4 Pages 201
Published: 1932
Released on J-STAGE: November 30, 2007
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Toshitaro MORINAGA1932 Volume 7 Issue 4 Pages 202-205
Published: 1932
Released on J-STAGE: November 30, 2007
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[in Japanese]1932 Volume 7 Issue 4 Pages 206-209
Published: 1932
Released on J-STAGE: November 30, 2007
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[in Japanese]1932 Volume 7 Issue 4 Pages 210-211
Published: 1932
Released on J-STAGE: November 30, 2007
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Some mterpretation on flower-colour-genes in Pharbitis Nil[in Japanese]1932 Volume 7 Issue 4 Pages 212
Published: 1932
Released on J-STAGE: November 30, 2007
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