巻号一覧
37 巻, 2 号
選択された号の論文の11件中1～11を表示しています
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Tsutomu HASHIGUCHI1962 年 37 巻 2 号 p. 91-96
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリーLigature experiments were carried out on the prepupae of the black pupa strain (bivoltine) which had been kept at 20°C after the mounting (spinning) stage. The results obtained were as follows.
Ligatures of prepupae in the early stage behind the second abdominal segments resulted in the inhibition of the manifestation of the black pupal color in the posterior parts. On the other hand, when prepupae in the advanced stage were ligatured, both the anterior and posterior parts became black. These results indicated that there was a critical period in the manifestation of the black pupal color and it was from 7 to 10 hours before pupation.
When prepupae were ligatured before the critical period and then kept at 30°C instead of being kept at 20°C, both the anterior and posterior parts of ligature became normal. It was concluded that the manifestation of the black pupal color is controlled by a hormone-like factor which is produced by some organs existing in the anterior part of ligature and the function of the organs is active at low temperature but inactive at high temperature.
Experiments in which prepupae were ligatured at different segments showed that several organs which are present in the part anterior to the second abdominal segment co-operatively control the manifestation of the black pupal color.抄録全体を表示PDF形式でダウンロード (1112K) -
Koji YANO1962 年 37 巻 2 号 p. 97-101
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリーThe gametophytic chromosomes of 7 moss species belonging to 6 families were studied. Their chromosome complements are formulated as follows:
Andreaeaceae
Andreaea nivalis Hook. K(n)=10=V(H)+5V+2J+2J(h)
Splachnaceae
Tetraplodon mnioides (Hedw.) B.S.G. K(n)=8=2V(H)+3V+2J+J(h)
Cryphaceaceae
Cyptodontopsits obutusifolia (Nog.) Nog. K(n)=11=V(H)+6V+3J+J(h)
Pilotrichopsis dentata (Mitt.) Besch. K(n)=8=V(H)+3V+3J+J(h)
Myuriaceae
Eumiurium sinicum (Mitt.) Nog. K(n)=10=V(H)+6V+2J+J(h)
Neckeraceae
Homalia japonica Besch. K(n)=11=V(H)+5V+4J+J(h)
Hookeriaceae
Distichophyllum maebarae Besch. K(n)=10=2V(H)+5V+2J+J(h)抄録全体を表示PDF形式でダウンロード (441K) -
Ikuo OKADA, Shiro TAKAGI, Kyuki MATSUMOTO1962 年 37 巻 2 号 p. 102-109
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリーOntogenetic studies of erythrocyte antigens were carried out in three systems of the chicken. There were differences among the systems, and also among the antigens within one system, in the developmental stages at which they could first be detected. The antigens in the F and H systems were detected in early embryonic stages, but the antigens in the B system exhibited considerable variability in the time of appearance-that is, from late embryonic stages to several days after hatching.
The percentage of chicks in which it was possible to estimate genotypes for the B system decreased temporarily after hatching. The agglutinability of the red blood cells of chicks increased to the same titer as in adult by the 30th day after hatching.抄録全体を表示PDF形式でダウンロード (797K) -
Yoshihisa FUJIO1962 年 37 巻 2 号 p. 110-117
発行日: 1962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 (1247K) -
Ichizo NISHIYAMA1962 年 37 巻 2 号 p. 118-130
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリーFor the pentaploid hybridization, Avena barbata, A. abyssinica and Tt-1 (a barbata like derivative from triploid hybrids, A. barbata×A. strigosa) were used as tetraploid parents and certain varieties of A. sativa and A. nuda as hexaploid ones. Young seedlings of the pentaploid hybrids were treated with 0.05% colchicine solution and their chromosome number was successfully doubled in some of them, producing decaploid amphiploids or chimera plants consisting of pentaploids and decaploids.
Decaploid plants or panicles (C1) showed high seed fertility although the pentaploid ones set usually no seeds. Decaploids amphiploids, however, failed to maintain their high seed fertility. In C8-C12 generations, however, some amphiploid lines recovered fertility equal to the original parents but other lines still showed low or wide variation in fertility.
Cytological investigations were attempted with certain lines in C9-C13. It is especially noted that certain lines have 2n=42, 54, 56, or 58, instead of the expected chromosome number, 70(2n) and those lines show regular meiotic behavior of chromosomes. In the other lines the chromosome number varied over a limited range (2-4) and still others over a wide range (4-8).
Some characters such as plant height, tillering, and date of maturity were studied and compared with one of the parents, A. sativa var. Banner. Most of these synthetic oats are new forms possessing some characters from both tetraploid and hexaploid parents, and are much improved in certain agronomic characters.抄録全体を表示PDF形式でダウンロード (1923K) -
Yoshiaki KITANI1962 年 37 巻 2 号 p. 131-146
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリーThe difference of the crossing over situation between 5:3 type aberrant asci and6:2 type aberrant asci was analyzed, and 6:2 asci were considered not to have transreplication-related crossing over frequently. The presence or absence of interferenceby the presence of transreplication-related crossing over was also analyzed, and it wasconsidered that the sp-mat interval may have been affected with interference is 5:3asci but may not have been affected in 6:2 asci. Somatic recombination was foundin one cross from the same of which large number of aberrant asci have been obtained.From above observations an explanation for the occurrence of 6:2 type aberrantasci was proposed. Main point of this explanation is that 6:2 type asci occurby a miscopying of new DNA synthesized in the localized pairing region of chromosomesduring mitosis instead of meiosis.抄録全体を表示PDF形式でダウンロード (1411K) -
Yuichiro HIRAIZUMI1962 年 37 巻 2 号 p. 147-154
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリーThe relation between distorted segregation (drive) and genetic load was studiedmathematically and it was found that even a slight driven effect increased the mutationalload to an appreciable magnitude, and decreased the substitutional load verysharply. It was also shown that when a population suffers from having a harmfuldriven element, inbreeding always contributes to increase the population fitness.抄録全体を表示PDF形式でダウンロード (712K) -
Koichiro TSUNEWAKI1962 年 37 巻 2 号 p. 155-168
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリーIn order to get comparable information on locations of genes in Emmer wheat (genome formula: AABB) and Aegilops squarrosa (DD) with those in common wheat (AABBDD), monosomic analysis of four synthesized 6x wheats was carried out using the monosomic series of Chinese Spring. The characters studied were growth habit, awnedness, glume hairiness and waxiness. The following results were obtained.
(1) Growth habit. Genes belonging to three allelic series, Sg1, Sg2 and Sg3 mainly control growth habit of the synthetics. Two alleles, Sg1c and sg1, which are derived from different Ae. squarrosa strains, have been identified at the Sg1 locus. Three alleles, Sg2, Sg2c and sg2, at the Sg2 locus and two alleles, Sg3 and sg3, at the Sg3 locus have been found in different Emmer species.
(2) Awnedness. All the synthetics and, accordingly, their respective Emmer components carry only hd and b2 alleles. None of the four synthetics have any major inhibitor, Hd, B1 or B2.
(3) Glume hairiness. Glume hairiness of ABD-4 is controlled by a single dominant gene that is derived from T. durum Golden Ball. This gene is homologous to the Hg allele of common wheat.
(4) Waxiness. Waxiness of the synthesized hexaploids is controlled by genes belonging to three allelic series, W, I1-W and I2-W. Both inhibitors, I1-W and I2-W are epistatic to a promotor, W. The alleles W and w at the W locus and I1-W and i1-W at the I1-W locus are found in Emmer components, while the inhibitor I2-W is present in Ae. squarrosa; the latter seems to have been lost at or after the synthesis of ABD-2.
These results indicate that most of the alleles known in the present-day common wheat were also present in its ancestors, Emmer wheat or Ae. squarrosa.
One of the contributions of Ae. squarrosa to the evolution of common wheat seems to be the donation of the most effective winter habit gene, sg1.抄録全体を表示PDF形式でダウンロード (1247K) -
辛味の遺伝太田 泰雄1962 年 37 巻 2 号 p. 169-175
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリー1. トウガラシ辛味の遺伝について, 定量的研究をおこなった。辛味成分 capsaicin の定量は閾値法による簡便法を考案し, これによった (Table 1)。
2. 甘親として C. annuum の大獅子 (P1, capsaicin 含有率0.05%) と伏見甘長 (P2, 0.05%), 辛親として八房 (P3, 0.25%), 鷹の爪 (P4, 0.30%) および C. frutescens Ac 1443 (P5, 1.00%) を用いた。
3. 甘(♀)×辛(♂)の交雑でえた果実の測定から, メタキセニア現象は認められなかった(Table 2)。
4. 甘×辛のばあい, 正逆交雑で差は認められない。F1 は辛親と同じ程度の辛さ, F2 および BF1 では甘親程度から辛親よりさらに辛いものまで分離し, その度数分布は二頂曲線となる (Tables 3, 4 および Figs. 2, 3, 5)。
5. 辛×辛のばあい, F1 はより辛い親と同じ程度の辛さ, F2, BF1 および BF2 は巾の広い連続変異を示す (Table 5 および Fig 6)。
6. 以上の結果, トウガラシの辛味に関して単純な分離は認められず, さらに多数の個体を用いて実験をおこなう必要がある。抄録全体を表示PDF形式でダウンロード (819K) -
塩田 義蔵1962 年 37 巻 2 号 p. 176-180
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリー1. sapphire と palomino の交雑により高級ミンク pearl を作出することができた。 pearl の遺伝子型は三劣性因子のホモ接合体として固定された。
2. pearl の遺伝分析を行った結果, pearl には表現型が全く同一である paloblu も含まれていることが判明したが, 遺伝の様式は全くメンデル式の三遺伝子劣性とし♦て aappjj の遺伝子型をもつことが確認された。抄録全体を表示PDF形式でダウンロード (989K) -
塩田 義蔵1962 年 37 巻 2 号 p. 181-185
発行日: 1962年
公開日: 2007/05/21
ジャーナル フリー1. sapphire と palomino との交雑に出発して, 3組の劣性遺伝子をホモにもつ純粋型の pearl を作出した。交雑開始後5年目にして純粋型の pearl (aappjj) を固定することができた。
2. pearl 作出に関する過去の実験資料にもとづき, 優良なパール遺伝子を保有するために重要なる数種の交配組合せを提示した。抄録全体を表示PDF形式でダウンロード (451K)
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