The Japanese Journal of Genetics

Local difference in the occurrence of twin plants and of the chromosome aberrations accompanied, in common wheat.

Yoshito Yamasaki

1947 Volume 22 Issue 5-6 Pages 61-66
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.61

JOURNAL FREE ACCESS

Show abstractHide abstract

1 The occurrence of twin plants and of the chromosome aberrations accompanied was exmined on the seeds of Norin No. 4, produced in the following localities: Okayama, Hiroshima, Shimane and Nara.
a) The chromosome aberration types detected in the twin plants were as follows: 42-21, 41-20, 42-63 and 42-84 (Table 2).
b) The frequency of twinning and of the occurrence of these chromosome aberrant halves were obviously greater in Okayama seeds than in the seeds from other localities (Table 1 & 2).
2 The seeds obtained from Okayama and Shimane were sown, in the fall of 1940, in Nagano, and the seeds produced in the following spring were examined.
a) The frequency of twinning and of the occurrence of the chromosome aberrant halves were again greater in Okayama-line than in Shimane-line (Table 3 & 4).
b) From these facts it may be concluded that the laocal difference of the frequency of twinning and of the occurrenec of the chromosome aberrant halves may be due to genetical differences which were induced by environmental dispafity in these localities,

View full abstract

Download PDF (554K)
Studies on phylogenetic differentiation in rice varieties

Hikoichi Oka

1947 Volume 22 Issue 5-6 Pages 67-72
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.67

JOURNAL FREE ACCESS

Download PDF (382K)
Two new strains of upland cotton in Southern Manchuria

Yoshiwo Katayama, Isawo Fujiwo

1947 Volume 22 Issue 5-6 Pages 72-77
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.72

JOURNAL FREE ACCESS

Show abstractHide abstract

Two new improved strains of upland cotton named “Kinshu No.1” and “Kinshu No.2” were bred by the authors at the Agricultural Experiment Station of Manchuria. In original crosses of these strains, Kanno No.1 was used as mother plant. This Kanno No.1 was bred by separation of Kings Improved and cultivated hitherto as an only good strain in southem Manchuria.
Kinshu No.1 reached perfection in 1943 in the F₇ generation of hybrids between Kanno No.1 and Gooch. Comparing with Kanno No.1 used as control, the new strain is 5 days early in the opening time of the bolls. In this strain, the percentage of ginned cotton to seed cotton is over 40, being 5% or more over that of the control. The production in ginned cotton is from 10% to 20% more than the control, Therefore this strain is suitable for cultivation in the northern part of the upland cotton zone in Manchuria.
The breeding of Kinshu No. 2 was completed in 1944 in the F₈ generation of hybrids between Kanno No.1 and Acala. Although the opening time of the bolls is the same as that of the control, it has a higher percentage of ginned cotton, over 40%, similar to the new strain, Kinshu No.1 as mentioned above. Moreover the production of ginned cotton is from 20% to 30% more than the control, Kanno No.1. Therefore this strain is recommended to be used in all main part of the upland cotton zone in Manchuria.

View full abstract

Download PDF (343K)
On an autotriploid plant of Viola tricolor L. var. hortensis DC.

U Nagaharu, Hirotoshi Huziwara

1947 Volume 22 Issue 5-6 Pages 77-81
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.77

JOURNAL FREE ACCESS

Show abstractHide abstract

1 Writers found an autotriploid plant of Viola tricolor L. var. hortensis DC. which is grown naturally on the farm.
2 In comparison with the sister diploid plant, the triploid plant did not show gigantic form. But on the epidermal tissue of leaf, the cells of this triploid plant were distinctly larger than those of the sister diploid plant.
3 By self pollination we could obtain no good seed with this triploid plant, but, by the crosses of 3x (belongs to horticultural race Uls water) ×2x (Super Swiss Giant) and 2x(Pure white) ×3x (Uls water) we could obtain a few good hybrid seeds. The hybrid seeds from 2x×3x showed the influence of pollen plant in their size and coat colour, while with the hybrid seeds from 2x (Pure white) ×2x (Uls water) we could not recognize the influence of pollen plant.
4 In diploid plant of V. tricolor we have observed 13 bivalent chromosomes in the heterotypic metaphase, while in this triploid plant we could count 39 chromosomes in a somatic cell. In the heterotypic metaphase of the triploid plant we could observe not only 13 trivalent chromosomes, but also variable number of chromosomes which consisted of trivalent, bivalent, and univalent chromosomes.
5 Perhaps this autotriploid has arisen from the fertilization between haploid egg cell and diploid male gamete.

View full abstract

Download PDF (423K)
Studies of linkage in the silkworm

I. Relation between VI and VIII linkage group

Minao Simodaira

1947 Volume 22 Issue 5-6 Pages 82-84
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.82

JOURNAL FREE ACCESS

Download PDF (167K)
Studies of linkage in the silkworm

II. Inheritance of lethal factor (l¹⁰)

Minao Simodaira

1947 Volume 22 Issue 5-6 Pages 84-86
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.84

JOURNAL FREE ACCESS

Download PDF (176K)
Studies of linkage in the silkworm

III. Inheritance of haimonkata type

Minao Simodaira

1947 Volume 22 Issue 5-6 Pages 87-88
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.87

JOURNAL FREE ACCESS

Download PDF (139K)
Inheritance of the compressed segments in silkworms

Kiyoshi Asano

1947 Volume 22 Issue 5-6 Pages 88-92
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.88

JOURNAL FREE ACCESS

Show abstractHide abstract

Some silkworms bearing all compressed segments were found out in spring of 1932. The body length of this worm shows about 59.1m.m. in full-growth while the normal 68.3m.m., and consequently such a compressed mechanism of segments is always obliged the straight alimentary canal to curve so remarkably as the vertebrate intestine shows. This abnormal has been ascertained to be inherited as a recessive character according to the crossing with the normal. This strain is inferior to the normal in several characters, that is, hatching, deathrate, development, cocoon making, egg-production etc.

View full abstract

Download PDF (361K)
On mother's giving birth to twins two times in her life

Genetical studies of large families, IV

Atusi Yamaura

1947 Volume 22 Issue 5-6 Pages 92-94
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.92

JOURNAL FREE ACCESS

Download PDF (166K)
Studies on the chromosomes of Ranatra chinensis Mayer

Takeharu Shikato

1947 Volume 22 Issue 5-6 Pages 94-95
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.94

JOURNAL FREE ACCESS

Download PDF (116K)
Karyologishe Beobachtungen bei F₁ Bastarden von Diploid×Tetraploid der Primula malacoides Franch

Nagaharu U, Hirotoshi Huziwara

1947 Volume 22 Issue 5-6 Pages 95-96
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.95

JOURNAL FREE ACCESS

Download PDF (133K)
Genetical and cytological studies in the breeding of amphidiploid types between Triticum and Secale

I. The external characters and chromosomes of the fertile F₁ T. turgidum (n=14)×S. cereale (n=7) and its F₂ progenies

Goichi Nakajima

1947 Volume 22 Issue 5-6 Pages 96
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.96

JOURNAL FREE ACCESS

Download PDF (78K)
On the behavior of incompatible pollen in the wild radish

Tamio Tatebe

1947 Volume 22 Issue 5-6 Pages 97
Published: 1947
Released on J-STAGE: November 30, 2007

DOIhttps://doi.org/10.1266/jjg.22.97

JOURNAL FREE ACCESS

Download PDF (55K)

Register with J-STAGE for free!