遺伝学雑誌
Online ISSN : 1880-5787
Print ISSN : 0021-504X
ISSN-L : 0021-504X
32 巻, 4 号
選択された号の論文の4件中1~4を表示しています
  • Mitsuo TSUJITA, Chiaki MATSUI
    1957 年 32 巻 4 号 p. 113-123
    発行日: 1957年
    公開日: 2007/05/21
    ジャーナル フリー
    1. By the infection of S-9 bacteria with T-c200 prophage various responses, lethal productive reversible and lysogenic are observed. Some of doubly lysogenized S-9 (T-c200) bacteria liberate phage with a new-type of host range.
    2. By infection with both S-9 and T-c200 phage, non-lysogenic S-IX bacteria can be changed into doubly lysogenic S-IX (S-9, T-c200) forms. In the doubly lysogenic bacterial strain thus formed, the new-type of phage is also produced.
    3. When the doubly lysogenic bacteria are isolated it seems that they give rise to cells which produce only one or the other parent type phage. It is concluded that recombination occurs only at the time the doubly lysogenic state is initiated.
  • BIOCHEMICAL STUDIES ON RED RICE PIGMENTATION
    Seijin NAGAO, Man-emon TAKAHASHI, Takao MIYAMOTO
    1957 年 32 巻 4 号 p. 124-128
    発行日: 1957年
    公開日: 2007/05/21
    ジャーナル フリー
    The chemical properties of the pigments occuring in the surface layers of the brown rice and the red rice were studied. From the results of the qualitative analyses on warm water extract of the pigmental parts, pericarps and seed coats (including aleuron layers), the authors have arrived at the conclusion that the pigments are series of catechin, catechol tannin and phlobaphene.
    Then, catechin+catechol tannin contents of those parts were estimated. A greater amount of the catechin+catechol tannin was estimated from the red rice and the smaller from the brown rice. Consequently, the brown rice gene, Rc, is regarded to have an effect of accumulating the pigments in the pigment layers, and Rd, which is a gene of the red rice when Rc is present, is regarded as causing a greater accumulation of the pigments than in case of the brown rice.
  • 中島 吾一
    1957 年 32 巻 4 号 p. 129-135
    発行日: 1957年
    公開日: 2007/05/21
    ジャーナル フリー
    1. Cytogenetical researches were carried on the F1 plants raised between T. orientale× S. africanum (ToriSaF1) and T. Spelta×S. montanum (TSpeSmF1). 2. The percentage of the matured F1 plants to the number of pollinated flowers in these hybrids were 0.87 and 1.38 percent respectively. 3. The external characteristics of ToriSaF1 plants resembled somewhat to the pollen plant, while TSpeSmF1 to the mother plant than being the intermediate of both parents (photos. 1-2, Table 2) in both cases. 4. ToriSaF1 plant showed fertility, while TSpeSmF1 was completely sterile (Table 2). 5. In the 2 F1 hybrids, the number of bivalents at heterotypic metaphase of PMC's is given in Table 3 and 5. 6. The number of bivalents, for ToriSaF1 up to 3 and for TSpeSmF1 up to 7, may be chiefly due to the autosyndesis of chromosomes of AB (ToriSaF1) or ABD (TSpeSmF1) genomes. In these bivalents of TSpeSmF1, however, bivalents produced by conjugation of the chromosomes of S. montanum may have been involved. 7. In these F1, the formation of equatorial plate in heterotypic metaphase of PMC's was observed in some individuals, in addition to the normal F1-type division commonly observed in the wheat-rye F1 hybrids. The frequency of the formation of equatorial plate is given in Table 4 and 6.
  • 第1報 Triticum vulgare Vill.×Agropyron glaucum Roem. et Schult. より得たる F1 の染色体の行動と形態
    渡辺 好郎, 百足 幸一郎
    1957 年 32 巻 4 号 p. 136-145
    発行日: 1957年
    公開日: 2007/05/21
    ジャーナル フリー
    1. 普通小麦の栽培品種4と育成複二倍体 Timopheevi-squarrosa (AAGGDD)を母とし, これに A. glaucum Roem. et Schult. の花粉を配して各組合せより夫々若干個体のF1を得たが, 授粉小花数に対する雑種生成歩合は組合せにより著しい相違を示した.
    2. MI における染色体接合型とその頻度もまた組合せにより著しく相違し, 二価染色体総数でいつてモードが10附近にある組合せ (赤皮赤とのF1)と, それより低い所にモードを有する組合せ (フルツ1号及び AAGGDD とのF1) 及び逆に高い所にモードを有する組合せ (本育49号及びヒラキ小麦とのF1) と3群に大別された (第2表及び第3図). 一価染色体も甚だ多く観察され, 多価染色体は四価迄みられた.
    3. 普通小麦とカモジグサとは少くとも1個のゲノムを共有していることが確められた.
    4. F1 は完全自殖不稔を示したが, Vulgare の栽培品種で戻交雑して若干の BF1 種子が得られた.
    5. 外部形態的には花粉親たるカモジグサの形質が強く現われ多年性となる. 耐病, 耐旱, 耐寒, 耐雪性強く, 特に分蘖能力著しく牧草として有望視される.
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