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Volume 13 (1937 - 193･･･
- Issue 6 Pages 269-
- Issue 5 Pages 209-
- Issue 3-4 Pages 135-
- Issue 2 Pages 81-
- Issue 1 Pages 1-
Volume 13, Issue 3-4
Displaying 1-11 of 11 articles from this issue
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I. CHROMOSOME AFFINITY BETWEEN THE GENOMSTutomu HAGA1937 Volume 13 Issue 3-4 Pages 135-145
Published: 1937
Released on J-STAGE: November 30, 2007
JOURNAL FREE ACCESSA natural 3n-hybrid Trillium Hagae (T Tschonoskii×T. kamtschaticum) was studied as to the number, morphology and behavior of the chromosomes. With the evidences resulted from the above investigation the genoms of the following 4 species were determined as shown in the Table.
Further, on the basis of the karyological findings, certain inferences were made as to the differentiation or evolution of the genom and polyploidy in the genus Trillium.
In conclusion the writer wishes to express his sincere thanks to Professor H. MATSUURA for his kind criticisms and suggestions in the course of the present study.View full abstractDownload PDF (1366K) -
Takeshige MAEDA1937 Volume 13 Issue 3-4 Pages 146-159
Published: 1937
Released on J-STAGE: November 30, 2007
JOURNAL FREE ACCESS1. The mode of chiasma distribution in Allium fistulosum L. and Allium Cepa L., and in their hybrids, F1, F2 and backcross plants was examined.
2. Numerical results obtained in Allium fistulosum L. (‘Hidanegi’) and Allium Cepa L. (‘Yellow Danvers’) are given in Tables 1 and 2.
3. In F1 plants of Allium fistulosum L. (‘Hidanegi’)×Allium Cepa L. (‘Yellow Danvers’) localized chiasmata were not observed. Univalents, fragments and bivalents of unequal pairs of univalents were found in the F1 plants.
4. In 4 of the 13 F2 plants obtained by selfing the F1 plants, and in 15 of the 21 plants of Allium fistulosum L. (‘Wasenegi’בKujonegi’)×F1 (‘Hidanegi’בYellow Danvers’) only some of the eight gemini were found to present the cruciform configulation with lacalized chiasmata (Tables 4 and 6). These results of observations are hardly explicable by the assumption of the action of a gene or a group of genes.
5. The univalents, fragments, bivalents of unequal pairs of univalents and chains of 2 chromosomes and a fragment were found in some of the F2 and the backcrossed plants (Tables 4 and 6).
6. The numerical results obtained by the observation of chiasmata in these F2 and backcross plants show that there are marked differences in distribution and frequency among individuals (Tables 5 and 7).View full abstractDownload PDF (452K) -
Akira YUASA1937 Volume 13 Issue 3-4 Pages 160-170
Published: 1937
Released on J-STAGE: November 30, 2007
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A. B. MISRA1937 Volume 13 Issue 3-4 Pages 171-174
Published: 1937
Released on J-STAGE: November 30, 2007
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A. B. MISRA1937 Volume 13 Issue 3-4 Pages 175-176
Published: 1937
Released on J-STAGE: November 30, 2007
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Goichi NAKAJIMA1937 Volume 13 Issue 3-4 Pages 177-184
Published: 1937
Released on J-STAGE: November 30, 2007
JOURNAL FREE ACCESS1. Crossing Triticum turgidum (n=14) with the pollen of a plant of Secale cereale (n=9), a hybrid individual was produced. The rye plant, used as pollen plant, had 2 specially small chromosomes besides 7 normal ones. In the individuals of the next generation raised by open pollination from this rye plant, 7, 8, and 9 chromosomes are found in P.M.C-s.
2. The characters of the F1 were intermediate between those of the parents, but the plant was smaller than the parents.
3. Chromosome counts in root tip cells of the F1 plant showed that the somatic number is clearly 23, the sum of the reduced numbers of the parents.
4. In P.M.C-s 0-5 bivalents and 23-13 univalents were observed. One specially small bivalent was occasionally observed which may probably be made of 2 extra chromosomes of Secale cereale by autosyndesis.
5. In the F1 chromosome behaviour in Ist. and 2nd. division of P.M.C-s was irregular, and frequently laggards and subsequent formation of extra nuclei were observed. At tetrad stage 3-6 cells often containing one or more extra micronuclei were found.
6. In one P.M.C. nine bivalent chromosomes were found together with 14 univalents. This may be attributed to the doubling of 9 rye chromosomes which may have occurred in the archesporial cell.View full abstractDownload PDF (352K) -
Tokio HAGIWARA1937 Volume 13 Issue 3-4 Pages 185-192
Published: 1937
Released on J-STAGE: November 30, 2007
JOURNAL FREE ACCESS1. For the study of the colouration of the seed coat of Japanese morning glory (Pharbitis Nil), a cross was made between a brown seed variety and a white seed one carrying a gene br (brown). In F2, brown and white segregated in the ratio of 3:1, with a mixture of some black ones and a mosaic plant which bore both black seed pods and brown seed pods. In F3 it was possible to confirm that the resulting black ones were due to the revertion of brown to black in the germ cells of F1 and that the mosaic plant had resulted from the somatic revertion which had occurred early in the meso-histogen and late in one part of the ecto-histogen of a brown individual in F_??_.
2. On the upper stem of some brown individuals of F2 derived from crosses between black and brown were found some abnormal brown seed pods containing a mixture of black seeds and black striped brown seeds. Further raising of these plants showed that the resulting black seed might have been due to the vegetative mutation which had taken place either only in the ecto-histogen or both in the ecto-histogen and meso-histogen.
3. The striped seeds may result in either of the following two cases: (1) When the false brown seed of the constitution known as Brbr or BrBr results from the vegetative mutation which has happened early in the meso-histogen, mutated reversionary in the ecto-histogen in the late stage. (2) When mutation occurs in the brown seed late in the ecto-histogen only.
4. Therefore a gene br concerned with brown is a mutable gene, which frequently changes both vegetatively and seminally to its dominant condition.
5. Seminal mutation may be said to occur in about 4 per cent of the cases, though the experiments were not sufficient in number to make it possible to fix the exact percentage. Vegetative mutation may occur either separately or coincidentally in the meso-histogen and ecto-histogen, the occurrence being most frequent during the early and late stages of the ontogenesis.View full abstractDownload PDF (432K) -
Y. Yamaraki1937 Volume 13 Issue 3-4 Pages 193
Published: 1937
Released on J-STAGE: November 30, 2007
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Kosuke YAMASHITA1937 Volume 13 Issue 3-4 Pages 194-195
Published: 1937
Released on J-STAGE: November 30, 2007
JOURNAL FREE ACCESSDie Chromosomenzahlen von 3 Zuckerrohr-Sorten in Formosa wurden festgestellt. Die Resultate sind in folgender Tabelle angegeben.View full abstractDownload PDF (68K) -
Kane NAKAYAMA1937 Volume 13 Issue 3-4 Pages 196-199
Published: 1937
Released on J-STAGE: November 30, 2007
JOURNAL FREE ACCESSThe genes, A and B, for the dwarf habit in rice show limiting effects on the growth of various vegetative organs, such as stem, panicle, glumes (lemma & palea) and outer glumes, in different degrees, but no effect on the growth of pollen grains, and little, if any, on that of some component parts of reproductive organs.
On the other hand, measurements of the length of dormant embryos as well as of coleoptiles and radicles give no indication of the presence of dwarf genes, so that their effects must be considered to first appear during the development of young plants.View full abstractDownload PDF (441K) -
T. Kubo1937 Volume 13 Issue 3-4 Pages 200-203
Published: 1937
Released on J-STAGE: November 30, 2007
JOURNAL FREE ACCESSDownload PDF (186K)
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