巻号一覧
61 巻, 1 号
選択された号の論文の9件中1～9を表示しています
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Akira TOMINAGA, Kiyoshi NAKAMURA, Masatoshi ENOMOTO1986 年 61 巻 1 号 p. 1-13
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーP1cinC(+) mutants were isolated from a P1CMclr100 lysogen based on the criterion that the cin mutation cannot restore flagellar phase variation of the hin pin strain, and a P1cinC(-) mutant was isolated from a P1cinC(+) lysogen of the hin+ pin+ strain by utilizing the difference in colonial types at 41°C. The hin+ pin+/P1cinC(-) strain yielded P1cinC(+) lysogens at a rate of 10-2 per bacterium while the hin pin/P1cinC(-) strain was considerably stable. Anti-P1cinC(+) serum neutralized both the P1cinC(-) and MuG(+) particles to 16% the rate of the homologous combination whereas anti-P1cinC(-) serum neutralized the P1cinC(+) particles to 45% the rate of the homologous combination. This indicates that P1cinC(+) and P1cinC(-) bear antigenically distinct polypeptides concerned with host specificity and that P1cinC(+) shares some antigen (s) involved in infectivity with MuG(+). The analysis of whole phage proteins revealed that P1cinC(+) had a 105kd polypeptide, and P1cinC(-) had 101kd instead of 105kd.抄録全体を表示PDF形式でダウンロード (1501K) -
Takashi HANDA, Yuri ISHIZAWA, Chiaki OOGAKI1986 年 61 巻 1 号 p. 15-24
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーThe large subunits (LS) and small subunits (SS) of Fraction I protein from 57 species and cultivars of the genus Citrus, Fortunella and Poncirus were compared to analyze the phylogenetic relationships among them. C. medica only had different LS. P. trifoliata and C. reticulata had unique SS respectively. Fortunella species, C. hystrix, C. latipes, C. limon and C. grandis also had the other unique SS. We consider that C. medica and C. reticulata are the original species of the cultivated citrus of the genus Citrus, along with C. grandis presumably. Thus we show our ideas of phylogenetic relationships of Citrus and its relatives based on their soelectrofocusing pattern of Fraction I protein.抄録全体を表示PDF形式でダウンロード (922K) -
Kenji YUKUHIRO, Terumi MUKAI1986 年 61 巻 1 号 p. 25-43
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーAn extremely large amount of detrimental load was found in the Osaka population of D. melanogaster, although the frequency of lethal-carrying second chromosomes (Q) was not different from the average of Japanese populations (Q=0.199 and D:L=2.04). Tests for male recombination and sterility tests for the P-M dysgenic system indicated that there is a putative transposon (tentatively named MY factor) which induces non-lethal deleterious mutations at a rate about 140 times higher than that of recessive lethal mutations per second chromosome in the M cytoplasm, and the frequency of individuals carrying the M cytoplasm was estimated to be ca. 20%. Thus, it was concluded that the extremely large detrimental load was induced by the MY factors.抄録全体を表示PDF形式でダウンロード (2080K) -
Kenji TAKAI1986 年 61 巻 1 号 p. 45-59
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーPolyacrylamide slab gel electrophoresis disclosed clear discrimination among strains of the malaria vector-containing Anopheles leucosphyrus group of mosquitoes in East Asia. Nine strains of the group were studied at 7 protein loci and the strains could be distinguished into 5 taxa. No variation among strains was detected at Mdh and Pt-8. In the other 5 protein loci, Me, Odh, Lap-8, Lap-9, and Est-1, almost no overlapping alleles were found among all strains, which allowed the following distinction among the strains, confirming the designation made by Kanda et al. (1983, 1985): An. balabacensis dirus (THL), An. b. balabacensis A (KTD), An, b. balabacensis B (IMR), An. takasagoensis (TSG), and An, leucosphyrus (SWK). The former 4 taxa had been lumped into the An, balabacensis complex (Kanda et al. 1983, 1985), but there was no clear remoteness between the complex and An. Leucosphyrus at the protein level. The result was discussed in the light of recent developments in protein variation.抄録全体を表示PDF形式でダウンロード (1644K) -
Shozo YOKOYAMA1986 年 61 巻 1 号 p. 61-70
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーhe HLA haplotypes are modelled by considering two loci with nA and nB alleles. Two symmetric overdominant selection models are studied: (1) the fitness of an individual is positively correlated with the number of antigens in that person and (2) the fitness of an individual is higher when he/she is in heterozygous condition with respect to the haplotype combination. For the first model, both multiplicative and additive fitnesses are considered. Population dynamics of the haplotypes are studied by considering four groups of haplotypes, i.e., AiBj, AiBj (l≠j), AkBj (k≠I) and AkBl (k≠i, l≠j) with respective frequencies X11, X10, X01, and X00 among adults. It is shown that the equilibrium points for the three models are the same, with X11= 1/nAnB, X10=(nB-1) X11, X01=(nA-1) X11, X00=(nA-1) (nB-1)X11, and D= X11X00-X10X01=0. The Hardy-Weinberg equilibrium point is globally stable except for the multiplicative fitness in the first model where the stability holds only when the recombination fraction is larger than or equal to the product of segregation loads at the two loci. The asymptotic rate of approach to the equilibrium is also obtained. That rate for the second model is identical to that for a single locus-multiple allele model with symmetric overdominant selection.抄録全体を表示PDF形式でダウンロード (991K) -
Koichi UENO, Yasuhisa IKENAGA, Haruhiro KARIYA1986 年 61 巻 1 号 p. 71-77
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーStudies on the sterility of triploid ayu were performed and its potentiality was evaluated, with the aim of eliminating some of the current difficulties of ayu culture and increasing culturing efficiency. Triploidy was induced by cold-shocking the eggs shortly after insemination. Observations of triploid ayu in the spawning season revealed the following facts. Each triploid shows no gametogenesis, because of its underdeveloped gonad. Most of the triploids show no secondary sexual characters and the edible portion of the triploid ayu is larger than that of the diploid. These results indicate that the production of triploid ayu is highly effective for the following purposes: 1) to lengthen the trading period of ayu as a commodity by extending the one-year life-span (diploids die after spawning), 2) to prevent the reduction of commercial value which is caused by the occurrence of secondary sexual characters and 3) to breed more profitable fish as edibles.抄録全体を表示PDF形式でダウンロード (1341K) -
Yasushi TAKENOUCHI, Esko SUOMALAINEN, Anssi SAURA, Juhani LOKKI1986 年 61 巻 1 号 p. 79-82
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーTetraploid and pentaploid individuals of Catapionus gracilicornis from Temma, Aomori Prefecture as well as triploid and hexaploid individuals of Blosyrus japonicus from Ishiyama-rikkyo, Hokkaido, have been assayed by starch gel electrophoresis. All weevils were parthenogenetic females. There was some variation within parthenogenetic populations. On the other hand, different degrees of polyploidy within a species were identical over all but one enzyme locus assayed. This is taken as further evidence to support the hypothesis of Suomalainen, advanced by Takenouchi, that different degrees of polyploidy in parthenogenetic weevils originate at abnormalities in spindle orientation.抄録全体を表示PDF形式でダウンロード (400K) -
Shin-ichi SATO1986 年 61 巻 1 号 p. 83-87
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーChanges in the distribution of iron during the embryo sac formation of Hemerocallis middendorffii var. esculenta were cytochemically examined. Iron was detected as Prussian blue products of various forms. The reaction products were not observed in the early stages of the megaspore, but they appeared in some cells in the chalazal region of the nucellus. The degenerating nucellar cells around the megaspore also had a number of small granular reaction products.
In the mature embryo sac, the egg contained a number of small granular products around the nucleus, and a few products were observed under the filiform apparatus of the synergids in some preparates. The degenerating antipodals and the central cell contained a cluster of granular products or the products of the complicate shape. The reason for the difference in the distribution of iron between Hemerocallis and Lilium is still unknown.抄録全体を表示PDF形式でダウンロード (746K) -
T. Ryu ENDO1986 年 61 巻 1 号 p. 89-93
発行日: 1986年
公開日: 2006/07/25
ジャーナル フリーThe C-banding technique was improved and all 21 chromosomes of two cultivars of common wheat, Triticum aestivum L, were successfully identified. The improved C-banding constantly differentiated a band or bands in all of the wheat chromosomes except 1A : Chromosomes 3D, 4D, 5D, and 6D, which bear no band by N-banding, showed distinctive banding patterns. The other banded chromosomes had banding patterns similar to those differentiated by N-banding. The C-band patterns comprised the bands by N-banding and, in some chromosomes, C-banding specific ones. The two common wheat cultivars showed similar C-banded karyotypes with minor variations.抄録全体を表示PDF形式でダウンロード (478K)
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