巻号一覧
6 巻, 1 号
選択された号の論文の3件中1～3を表示しています
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鈴木 簡一郎, 太田 愼一郎1930 年 6 巻 1 号 p. 1-13
発行日: 1930年
公開日: 2007/11/30
ジャーナル フリー(1) 重「い」形蠶は最初日109號♀と支102號♂とのF1代に於て優性突然變異として唯一頭發現せるものなり。
(2) 重「い」形蠶は過剩半月紋を第六環節に有し且第八環節に星状紋を缺くの特徴を有す。
(3) 普通斑重「い」形蠶又は姫重「い」形蠶は共にCa因子の存在に因るものにして同因子は之れに關しホモの個體を致死せしむれどもヘテロのものはよく生存す即致死作用に關しては劣性なうとす。
(4) Ca因子の致死作用は卵の孵化直前に現はれ重「い」形蠶及姫重「い」形蠶相互交配蛾の産卵に於て其約25%を催青期死卵たらしむ。抄録全体を表示PDF形式でダウンロード (2298K) -
岡部 作一1930 年 6 巻 1 号 p. 14-19
発行日: 1930年
公開日: 2007/11/30
ジャーナル フリー1. Die somatische Chromosomenzahl von Houttuynia cordata beträgt 94-98.
2. Bei der Kernteilung der Pollenmutterzellen treten einige Univalenten und viele Gemini auf und die Reduktion der Chromosomenzahl wird unregelmässig ausgeführt.
3. Es gibt zwei Typen der ersten Kernteilung in der Embryosackmutterzelle. Bei einem Typus treten einige Univalenten und viele Gemini auf wie bei den Pollenmutterzellen, und bei dem anderen kommen alle Chromosomen als Univalenten vor, und keine Reduktion der Chromosomenzahl wird ausgeführt.
4. Die Eizelle des diploiden Embryosackes entwickelt sich ohne Befruchtung, also ganz parthenogenetisch zum Embryo.抄録全体を表示PDF形式でダウンロード (301K) -
Tsunetaro SASAOKA1930 年 6 巻 1 号 p. 21-32
発行日: 1930年
公開日: 2007/11/30
ジャーナル フリー1. The karyological study in the hybrids of the following combinations were carried out.
Group 1. B. Napus, L. var. Napobassica, REICHB. n=19_??_×B. pekinensis, RUPR. n=10 _??_ B. Napus, L. var. Napobrassica, REICHB. _??_×B. nipposinica, BAILEY, n=10 _??_ B. Napus, L. var. oleifera, DC. n=19 _??_×B. rapa, L. n=10 _??_ B. pekinensis, RUPR. n=10 _??_×B. Napus, L. var. oleifera DC. n=19 _??_
Group 2. B. Napus, L. var. oleifera DC. n=19 _??_×B. Napus, L. var. oleifera DC. n=19 _??_ B. Napus, L. var. Napobrassica, REICHB. n=19 _??_×B. Napus, L. var. oleifera, DC. n=19 _??_
Group 3. B. Napus, L. var. Napobrassica, REICHB. n=19 _??_×B. juncea, COSS. n=18 _??_ B. juncea, Coss. n=18 _??_×B. Napus, L. var. Napobrassica, REICHB. E=19 _??_
2. The meiosis of the pollen mother cells are very similar in every hybrid of group 1. 10 bivalents and 9 univalents appearing in the heterotype division. After the bivalents were separated and passed to the pole normally, the univalents distributed irregularly with the splitting of a few chromosomes. Homotype division was carried on normally, though in a few cases the lagging chromosomes and the splitting of the univalents were observed. Restitution nucleus was found sometimes.
3. With the hybrids of the combination in group 2, no abnormality in the meiosis of the pollen mother cells was observed. 19 bivalents appeared in the heterotype division and the chromosomes were distributed normally in the heterotype and homotype divisions.
4. 10 bivalents and 17 univalents appeared in the heterotype division of the pollen mother cells of the hybrid group 3. After the former passed to both poles normally, the latter were distributed irregularly with the splitting of some chromosomes. In the homotype division, the general feature was normal though some lagging chromosomes and splitting of halves of chromosomes were to be seen. The occurrence of large nuclei and dyads, however, were also observed in a few cases.
5. Abnormal meiosis as in the F1 progenies of group 1 and 3 was also observed in the F2 hybrids of B. Napus, var. oleifera×B. pekinensis and B. juncea×B. Napus, var. Napobrassica. The number of the bivalents was the same or more and the univalents less than in the F1 progenies. In the heterotype division of B. juncea×B. Napus, var. Napobrassica the chromosomes were sometimes supernumerous. The polyads, from dyads to hexads, were also formed in F2 hybrids. Univalents often occurred in a ring in F2 progenies of B. juncea×B. Napus, var. Napobrassica. The number of univalents in a ring was less than those of F1 progenies. Some univalents of F2 progenies of B. Napus, var. oleifera×B. pekinensis were also arranged in a ring though the arrangement was rather irregular.抄録全体を表示PDF形式でダウンロード (532K)
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