巻号一覧
31 巻, 5 号
選択された号の論文の6件中1～6を表示しています
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Yoshiwo KATAYAMA, Shojiro SHIDA1956 年 31 巻 5 号 p. 131-136
発行日: 1956年
公開日: 2007/05/21
ジャーナル フリーPDF形式でダウンロード (368K) -
I. THE KARYOTYPE ANALYSIS AND ITS PHYLOGENIC CONSIDERATION IN SUBTRIBE GNAPHALIINEAEHisao ARANO1956 年 31 巻 5 号 p. 137-143
発行日: 1956年
公開日: 2007/05/21
ジャーナル フリー(1) The taxonomic problem of the subtribe Gnaphallineae was considered.
(2) The genera Gnaphalium, Anaphalis and Leontopodium were discussed from a karyotaxonomic stand point.
(3) In several species, seed fertility can be explained by their karyotypic peculiarities.
(4) A. pterocaulon Maxim or A. todaiensis Honda or A. sinica Hance shows a specific constitution of the karyotype different from all the rest of subtribe Gnaphallineae.抄録全体を表示PDF形式でダウンロード (632K) -
Takeharu KANEHISA1956 年 31 巻 5 号 p. 144-146
発行日: 1956年
公開日: 2007/05/21
ジャーナル フリー1. From the original tumor strain, or bw tu, a strain having only the tumor gene, or tu (53 d), was isolated. Various eye-colour strains were mated with tu (53d). From the offspring of these matings the following tumor strains were newly estabiished: bw tu, v tu, cn tu, v bw tu, tu st, and bw tu st. The incidence of tumor in each strain was studied.
2. The results show that the incidence of tumor increases when the tumor gene is accompanied by the eye-colour gene. According to the rate of increase in the incidence of tumor, newly established strains are arranged in a line as follows: tu, bw tu, v tu, cn tu, v bw tu, tu st, and bw tu st.
3. Eye-colours of these eye-colour mutants are considered to be regulated by the tryptophane metabolism in the development of Drosophila. It is, therefore, assumed that the incidence of tumor has a certain close connection with the tryptophane metabolic system.抄録全体を表示PDF形式でダウンロード (299K) -
Taro JINNO1956 年 31 巻 5 号 p. 147-150
発行日: 1956年
公開日: 2007/05/21
ジャーナル フリーPDF形式でダウンロード (299K) -
安澄 権八郎, 脇坂 一郎1956 年 31 巻 5 号 p. 151-154
発行日: 1956年
公開日: 2007/05/21
ジャーナル フリー白ネズミの成熟精子を超薄切片によつて電子顕微鏡で観察した.
精子尾部の軸繊維は, 1対の中心原繊維をとりまく9本の原繊維と, さらにこれらをとりまく9本の原繊維から成る. 軸繊維をとりまく被膜はらせん状であつて, 結合部では管空状であり, 主部ではテープ状である. らせん膜の外側に連続した薄膜が存在する.抄録全体を表示PDF形式でダウンロード (595K) -
XIV. 5組の種間雑種の減数分裂竹中 要1956 年 31 巻 5 号 p. 155-161
発行日: 1956年
公開日: 2007/05/21
ジャーナル フリー1) At MI in PMC's of F1 N. sylvestris (n=12)×N. otophora (n=12), a pairing range 0-5 was found with mode at 2-3. In the same hybrid Goodspeed (1954) observed 0-7 bivalents with mode at 3.
2) At MI in PMC's of F1 N. sylvestris (n=12)×N. tomentosa (n=12), 0-7 bivalents were found with mode at 3. Goodspeed (1954) found pairing ranges of 0-7 with mode at 3 and 0-7 with mode at 2-3 respectively in F1 N. sylvestris×N. setchellii and F1 N. sylvestris× N. tomentosa. Kostoff (1943) found, in F1 N. sylvestris×N. tomentosa, usually univalents or 1 to 4 bivalents and rarely more than 4 bivalents. He also observed, in F1 N. sylvestris×N. tomentosiformis, somewhat less bivalents than in the former. The writer (1955) found 1-9 bivalents with mode at 4 in F1 N. sylvestris×N. tomentosiformis. From the results mentioned above, we can assume 2-4 homologous chromosomes or large homologous portions between sylvestris genome and the genomes of the tomentosa group.
3) At MI in PMC's of F1 N. tabacum (n=24)×N. solanifolia (n=12), a pairing range 1-5 was found with mode at 1. Goodspeed also found 0-7 bivalents with mode at 2. Accordingly the conjugational affinity between tabacum and solanifolia genomes is assumed to be generally the same as the intragenomatic affinity in N. tabacum.
4) At MI of PMC's of F1 N. Debneyi (n=24)×N. tabacum (n=24), 0-6 bivalents were found with mode at 2. Kostoff also found usually univalents or 1-3 bivalents. From these results it appears that there may be no pairing between tabacum and Debneyi genomes, since a few intragenomatic affinities in N. tabacum are present.
5) At MI of PMC's of the hybrid N. rustica×N. paniculata, the writer observed a univalent range 2-12, a bivalent range 2-12 and a trivalent range 0-10. In the same hybrid, Goodspeed found usually 12 bivalents and occasionaly 1 trivalent or rarely 2 trivalents. Kostoff also found usually 12 bivalents and 12 univalents, and rarely 1 trivalent. The writer observed more trivalents, but N. paniculata is recognized to be one of the ancestors of N. rustica.抄録全体を表示PDF形式でダウンロード (720K)
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