Idengaku zasshi最新文献_第6页

Phylogenetic relationship between the Iriomote cat and the leopard cat, Felis bengalensis, based on the ribosomal DNA. 基于核糖体DNA的ioliomote猫和豹猫的系统发育关系。

Idengaku zasshi Pub Date : 1994-08-01 DOI: 10.1266/jjg.69.397

H Suzuki, T Hosoda, S Sakurai, K Tsuchiya, I Munechika, V P Korablev

{"title":"Phylogenetic relationship between the Iriomote cat and the leopard cat, Felis bengalensis, based on the ribosomal DNA.","authors":"H Suzuki, T Hosoda, S Sakurai, K Tsuchiya, I Munechika, V P Korablev","doi":"10.1266/jjg.69.397","DOIUrl":"https://doi.org/10.1266/jjg.69.397","url":null,"abstract":"We analyzed the restriction fragment length polymorphisms in the spacer regions of ribosomal DNA (rDNA), using twelve restriction enzymes, to examine whether the Iriomote cat is related to the leopard cat (Felis bengalensis). A restriction map for each taxon was constructed and the major taxon-specific types of repeating unit (repetypes) were characterized on the basis of the arrangements of restriction sites. The Iriomote cat and the leopard cat share a common repetype but this repetype is different from that of the domestic cat (F. catus) with an estimated sequence divergence of 1.5% and from that of the ocelot (F. paradalis) with an estimated sequence divergence of 2.5%. These results indicate that, phylogenetically, the Iriomote cat is closely related to the leopard cat and that the ancestral population moved from the continent to Iriomote Island quite recently. The rDNA arrays of the leopard cat exhibit considerable intragenomic size-variation, which is thought to have emerged as a result of differences in numbers of repeated DNA segments, whereas the extent of such size-variation is much lower in the rDNA of the Iriomote cat. It appears that, even though migration of the Iriomote cat occurred relatively recently, the population has diverged to some extent from its continental counterpart, perhaps via fixation of preexistent intraspecific variations rather than by generation of new variations.","PeriodicalId":13120,"journal":{"name":"Idengaku zasshi","volume":"69 4","pages":"397-406"},"PeriodicalIF":0.0,"publicationDate":"1994-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1266/jjg.69.397","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18941381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Restriction map polymorphism in the forked and vermilion regions of Drosophila melanogaster. 黑腹果蝇分叉区和朱红色区限制性基因图谱多态性研究。

Idengaku zasshi Pub Date : 1994-06-01 DOI: 10.1266/jjg.69.297

N T Miyashita, C H Langley

引用次数: 3

Statistical methods for estimating the effective number of alleles, expected heterozygosity and genetic distance in self-incompatibility locus. 自交不亲和位点有效等位基因数、期望杂合度和遗传距离的统计估计方法。

Idengaku zasshi Pub Date : 1994-06-01 DOI: 10.1266/jjg.69.287

F Tajima, T Tokunaga, N T Miyashita

引用次数: 8

Morphometric variability in the Chagas' disease vector Rhodnius prolixus. 南美锥虫病媒介长角锥虫的形态变异。

Idengaku zasshi Pub Date : 1994-06-01 DOI: 10.1266/jjg.69.233

M Harry

{"title":"Morphometric variability in the Chagas' disease vector Rhodnius prolixus.","authors":"M Harry","doi":"10.1266/jjg.69.233","DOIUrl":"https://doi.org/10.1266/jjg.69.233","url":null,"abstract":"Morphometric variability was studied in six domestic Venezuelan populations of the blood-sucking bug Rhodnius prolixus Stal 1897 (Reduviidae, Triatominae) and in a sylvatic population identified as R. robustus Larrousse 1927. Evidence is here provided by both uni- and multifactorial analyses of extensive variation of morphological traits between the R. prolixus populations studied. Regardless the geographic or climatic environmental factor tested, none can be retained in a selective model accounting for the morphological variability observed. Moreover, the results failed to support any correlation between the morphological Mahalanobis' distances and geographical distances. The genetic relationships between these populations inferred from the present data, are more consistent with some demic structure, resulting from random genetic drift by founder effects, than with any alternative population genetic model. It is noteworthy that the range of variation of these morphological traits in R. prolixus includes the putative R. robustus population. Therefore, the species-specific status of R. robustus, at the very least the local Trujillo population studied, is questioned. In addition, a preliminary multifactorial analysis bearing on the three other Rhodnius relatives, R. pictipes Stal 1872, R. nasutus Stal 1859 and R. neglectus Lent 1954, confirmed the marked morphological differentiation of R. pictipes from all other species and showed a clear morphological differentiation of R. nasutus and R. neglectus both from one another and from R. prolixus.","PeriodicalId":13120,"journal":{"name":"Idengaku zasshi","volume":"69 3","pages":"233-50"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1266/jjg.69.233","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19073956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

A comparative study of the enzymological features of alpha-amylase in the Drosophila melanogaster species subgroup. 黑腹果蝇种亚群α -淀粉酶酶学特征的比较研究。

Idengaku zasshi Pub Date : 1994-06-01 DOI: 10.1266/jjg.69.251

H Shibata, T Yamazaki

引用次数: 15

Identification of the region that determines the specificity of binding of the transposases encoded by Tn3 and gamma delta to the terminal inverted repeat sequences. 鉴定了Tn3和γ δ编码的转座酶与末端倒置重复序列结合特异性的区域。

Idengaku zasshi Pub Date : 1994-06-01 DOI: 10.1266/jjg.69.269

T Maekawa, E Ohtsubo

{"title":"Identification of the region that determines the specificity of binding of the transposases encoded by Tn3 and gamma delta to the terminal inverted repeat sequences.","authors":"T Maekawa, E Ohtsubo","doi":"10.1266/jjg.69.269","DOIUrl":"https://doi.org/10.1266/jjg.69.269","url":null,"abstract":"To analyze the region that determines the specificity of binding of the Tn3 transposase to the terminal inverted repeat sequences (IR), we first determined the nucleotide sequence of a Tn3-family transposon, gamma delta, which is supposed to encode a transposase similar to that of Tn3. gamma delta was 5981 bp in length and contained three coding frames: Two were the genes, tnpA and tnpR, encoding transposase (1002 amino acids) and resolvase/repressor (183 amino acids), respectively, and the third, named tnpX, encoding a protein (698 amino acids) of unknown function but containing two NTP-binding motifs. Utilizing the tnpA sequence, we then constructed a series of Tn3-gamma delta hybrid genes encoding chimeric proteins in the N-terminal segments of the transposases (amino acid position 1 to 242 of Tn3 or 1' to 243' of gamma delta), which has been previously shown to be responsible for specific binding of transposase to IR sequences in Tn3. Examination of their DNA-binding activities revealed that the subsegment of the N-terminus from amino acid position 1 to 109 determines the specificity of binding to the IR sequences. The third coding frame found in gamma delta, tnpX, is located downstream of tnpR and is expressed from the tnpR promoter in the absence of the tnpR gene product, resolvase/repressor, to produce a protein that inhibits the growth of the host cells. Possible roles of this protein are discussed.","PeriodicalId":13120,"journal":{"name":"Idengaku zasshi","volume":"69 3","pages":"269-85"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1266/jjg.69.269","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19073959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Cytogenetic and molecular analysis of dynamic mutation associated with fragile X syndrome. 脆性X综合征相关动态突变的细胞遗传学和分子分析。

Idengaku zasshi Pub Date : 1994-06-01 DOI: 10.1266/jjg.69.259

N Seki, S Ishikiriyama, M Yamauchi, T Hori

{"title":"Cytogenetic and molecular analysis of dynamic mutation associated with fragile X syndrome.","authors":"N Seki, S Ishikiriyama, M Yamauchi, T Hori","doi":"10.1266/jjg.69.259","DOIUrl":"https://doi.org/10.1266/jjg.69.259","url":null,"abstract":"Fragile X syndrome is the most common familial form of mental retardation and known to be associated with the fragile site at Xq27.3 (FRAXA). The syndrome has recently been characterized by a unique genetic mechanism which involves dynamic mutation due to a heritable unstable DNA sequence, p(CCG)n repeat, in the FRAXA locus. We were asked to make a genetic diagnosis on the case of a normal male who has two brothers and a maternal uncle with mental retardation. We performed the pedigree analysis of the fragile X syndrome using both cytogenetic and molecular techniques. The affected two brothers and the uncle showed cytogenetic expression of the fra (X)(q27.3) and carried hypermethylated full mutation in the FRAXA locus. The phenotypically normal mother also exhibited fragile X expression and was found to be a carrier of premutation. Via female transmission, the premutation converted to full mutation and exhibited somatic heterogeneity and hypermethylation. However, both cytogenetic and molecular data did not show any evidence of fragile X mutation in the normal male client and, thus, excluded the possibility of his being a carrier.","PeriodicalId":13120,"journal":{"name":"Idengaku zasshi","volume":"69 3","pages":"259-67"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1266/jjg.69.259","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19073958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Polytene chromosome arrangements in Drosophila bocki. 波基果蝇的多染色体排列。

Idengaku zasshi Pub Date : 1994-06-01 DOI: 10.1266/jjg.69.227

S Kitthawee, V Baimai

引用次数: 0

The origins of the Japanese mainland population of Drosophila albomicans. 日本大陆果蝇种群的起源。

Idengaku zasshi Pub Date : 1994-04-01 DOI: 10.1266/jjg.69.183

T Ohsako, T Aotsuka, O Kitagawa

引用次数: 12

Phylogenetic place of a mitochondria-lacking protozoan, Entamoeba histolytica, inferred from amino acid sequences of elongation factor 2'. 一种缺乏线粒体的原生动物，溶组织内阿米巴的系统发育位置，从延伸因子2'的氨基酸序列推断。

Idengaku zasshi Pub Date : 1994-04-01 DOI: 10.1266/jjg.69.119

T Shirakura, T Hashimoto, Y Nakamura, T Kamaishi, Y Cao, J Adachi, M Hasegawa, A Yamamoto, N Goto

引用次数: 18