巻号一覧
18 巻, 6 号
選択された号の論文の6件中1～6を表示しています
- |<
- <
- 1
- >
- >|
-
星野 安咨1942 年 18 巻 6 号 p. 285-296
発行日: 1942年
公開日: 2007/04/04
ジャーナル フリー既報第I-V並びに上述の實驗結果により, 次の事が云へる。
1. conspicua, gutta, distincta, transversifascia, spectabilis, rostrata, axyridis, forficula,aulica, succinea-1, succinea-2, succinea-3, succinea-4, succinea-5 及び succinea-6は互ひに單性雜種をなす。
2. succinea-1, succinea-2, succinea-3, succinea-4, succinea-5 及び succinea-6 に對して, 夫々 p1, p2, p3, p4, p5 及び p6 なる因子符號を與へるとすれば, 次の15因子は複對因子系を構成し, 常染色體色上に存在する。
PC (conspicua 因子), PG (gutta 因子), PD (distincta 因子), PT (transversifascia 因子), PS (spectabilis 因子), PR (rostrata 因子), PA (axyridis 因子), PF (forficula 因子), PAu (aulica 因子), p1 (succinea-1 因子), p2 (succinea-2 因子), p3 (succinea-3因子), p4 (succinea-4 因子), p5 (succinea-5 因子) 及び p6 (succinea-6 因子)。
3. 各型ともホモ接合體が存在する。
4. succinea の各因子型に對して, 夫々固有の表現型の變異状態が見られる。
5. 因子型を異にする succinea は同一環境下の飼育に於ても, 其表現に互ひに著しい差異を見る場合がある。
6. 翅鞘斑紋を生ずる色素は黒色と紅色とあり, 一般的に前者の存在は後者の存在に對して單優性を示す。抄録全体を表示PDF形式でダウンロード (1009K) -
盛永 俊太郎, 栗山 英雄, 青木 政春1942 年 18 巻 6 号 p. 297-304
発行日: 1942年
公開日: 2007/04/04
ジャーナル フリー(1) Some clonal individuals of a haploid plant of Dekiyama produced, in 1933, several diploid tillers which were normal in every respects (1). In the self pollination progenies traced back to those diploid tillers, certain lines in 1936 segregated, besides the normal plants, very small and sterile individuals nearly in a monohybrid recessive ratio (Table 1). A majority of the normal plants also segregated the dwarf type next year in the same ratio.
(2) At germination, most of the seeds which develop into the dwarf produce hairs very poorly on the epiblast and coleorhiza (Fig. 3). Though the dwarf is discriminated from the normal even in the first foliage stage, the distinction of the two types becomes very clear with the development of the second leaf on account of its short and narrow sheath and short and curved blade.
(3) The upper epidermis of the young dwarf leaf is very characteristic for its far larger number of bulliform cells and the shortness of the ripple wall ones (Figs. 7 and 8).
(4) The dwarf grows more slowly in length than the normal, though it tillers more quickly. The dwarf in maturity is smaller than the normal in every respects of the plant, and the height of the plant is only about 1/4 of that of the normal (Table 3). The development of the flower organs is poor, and no seeds are produced.
(5) Micro- and megasporogenesis is carried through very regularly in the dwarf, but it can not produce any viable pollen-grains or embryo-sacs. Strange to say, a fairly large percent of ovaries contained two ovules (Fig. 16).
(6) We can not tell at present whether this sterile and extremely dwarf mutant is caused by a simple factor mutation or by a loss of a small portion of a chromosome.抄録全体を表示PDF形式でダウンロード (1589K) -
田島 彌太郎1942 年 18 巻 6 号 p. 305-308
発行日: 1942年
公開日: 2007/04/04
ジャーナル フリーBy application of high temperature shock many mosaics have been obtained in the silkworm egg. As a possible explanation, it was assumed that they are due to binucleated eggs, one of nuclei being a normaly fertilized egg-nucleus and the other being formed by fusion of two spermatozoan-nuclei. There are, however, some cases where this explanation does not apply. One of them, which I am dealing with, is presumably due to a recessive mutation.
This type of mosaic was obtained in a heat-treated egg from a crossing of (PSY/PSY, Re Pe/Re Pe) _??_×(P y/P y, re pe/re pe) _??_. Of 4330 treated eggs, 74 were mosaics and of these only four caterpillars hatched out next spring, the rest all died during hybernation. One of the caterpillars (mp. 43) was heterozygous striped, which is usually expected from F1 offspring. The egg from which this caterpillar hatched out was an intermingled mosaic of black and pink serosa cells, as is shown in Fig. 1. The moth resulted from this caterpillar was female and had a mosaic eye on the left consisting of black and pink facets (Fig. 2). This heterozygous mosaic female was mated to p y/p y, pe/pe male. The segregation between PSY and Py was almost normal as is usually expected for FR1, while Pe-pe ratio was quite abnormal. The segregation of sex chromosomes was also normal in this female and gave normal sex ratio in her offspring. Thus abnormality is evidently limited to the Pe gene. As a possible explanation of this fact several assumptions may be done, but the recessive mutation of Pe to pe in the two cell stage seems to be most probable.
From this mosaic, and others obtained in another way, we learn some important facts as follows;
1. Pe gene does not secrete pe+ substance in the moth of this insect as well as in the egg, as was previously reported by the author. The same conclusion was also confirmed to be applicable to Re gene from another experiment.
2. Mosaic pattern of the compound eye of this insect is very peculiar concerning to the distribution of mosaic tissues, i.e. the striated or band-like arrangement of facets of different colours (Fig. 3). Mosaic tissues do never arrange in a direction parallel to the plane of symmetry in the moth. This fact suggests the direction of development of the compound eyes.抄録全体を表示PDF形式でダウンロード (656K) -
門馬 榮治1942 年 18 巻 6 号 p. 309-312
発行日: 1942年
公開日: 2007/04/04
ジャーナル フリーIt has been found that the chromosomes of Brachytrupes portentosus, the large brown cricket, vary in the number and form according to individuals. Tateishi ('31) found the following three chromosomal variations in this species; (a) 4V's+10 rods+ X, (b) 5V's+8 rods+X, and (c) 6V's+6 rods+X. While three other types, quite different from those of Tateishi ('31), were reported by Ohmachi ('35) in the same species, such as (a) 6V's+7 rods+X, (b) 19 rods+X and (c) 4V's+10 rods+X. In the three different individuals of the same species recently obtained in Taiwan, the present author observed two different chromosome complexes, one of which consists of 5V's+2J's+7 rods+X (Figs. 1-2; 5-6) and the other contains 5V's+2J's+7 rods +2m-chroms.+X (Figs. 3-4; 7-8).抄録全体を表示PDF形式でダウンロード (449K) -
佐々木 靜1942 年 18 巻 6 号 p. 312-313
発行日: 1942年
公開日: 2007/04/04
ジャーナル フリーPDF形式でダウンロード (190K) -
唐澤 光太郎1942 年 18 巻 6 号 p. 314-319
発行日: 1942年
公開日: 2007/04/04
ジャーナル フリーPDF形式でダウンロード (724K)
- |<
- <
- 1
- >
- >|