巻号一覧
59 巻, 3 号
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VI. An accomplishment of a trisomic series in japonica rice plantsNobuo IWATA, Takeshi OMURA1984 年 59 巻 3 号 p. 199-204
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーExtra chromosomes of 3 trisomic types, M, N and O, discovered recently in rice were clarified. Adding these 3 types to 9 types previously found, a complete set of 12 primary trisomics, having the homogeneous background of the cultivar Nipponbare, was established in japonica rice. The relationships among trisomics, chromosomes and linkage groups made clear up to the present time are shown.抄録全体を表示PDF形式でダウンロード (261K) -
Hirosumi FUJISHIMA1984 年 59 巻 3 号 p. 205-214
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーRanunculus cantoniensis (2n=32), one kind of weeds commonly seen in a paddyfield, is an allied species to R. silerifolius (2n=16). The reciprocal crossings were carried out between the two species, and only two interspecific hybrids, one with 2n=24 and the other with 2n=32, were produced in the case where R, cantoniensis was a maternal plant. It was karyologically judged that the chromosome complement of the F1 with 2n=24 consisted of a half set of R. cantoniensis and a half set of R. silerifolius and the 8III configuration was observed at MI. The chromosome complement of the F1 with 2n=32 consisted of a half set of R. cantoniensis and the full set of R. silerifolius, and the 16II configuration was observed. Thus, it was considered that R, cantoniensis was primarily of an autotetraploid origin and the basic chromosome sets of R. cantoniensis and R. silerifolius were originally homologous each other, and that R. cantoniensis might be placed at the secondary stage in the process of cytogenetical diploidization.抄録全体を表示PDF形式でダウンロード (767K) -
Koichiro TSUNEWAKI, Mamiko MAEKAWA, Hisashi TSUJIMOTO1984 年 59 巻 3 号 p. 215-224
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーTo test the usefulness of hexaploid triticale (genome constitution AABBRR) as a plasma type tester for Triticum and Aegilops cytoplasms, six alloplasmic lines and a euplasmic line of both triticale cultivar Rosner and a common wheat cultivar Chinese Spring were grown under the same experimental design, and the effects of the individual alien cytoplasms on 16 morphological or physiological characters of Rosner and Chinese Spring were compared. Cytoplasms used in this study were derived from common and emmer wheats belonging to the B plasma type, Ae. Squarrosa and Ae. cylindrica belonging to the D plasma type, the D2 plasma type Ae. juvenalis, the M° plasma type Ae. ovata, and the S plasma type Ae. speltoides.
D2, M° and S type cytoplasms caused severe growth depression, delayed heading and complete male sterility in Rosner triticale, thus affecting almost all its characters. D type cytoplasms caused about 50% reduction in seed fertility and slight decrease in culm diameter. The cytoplasm of common wheat was the same as that of Rosner which originated from an emmer wheat. By contrast, in Chinese Spring wheat, only the M° type cytoplasm affected several characters greatly. D and D2 cytoplasms exerted a significant influence on only one to two characters. B and S type cytoplasms behaved the same. Thus, it is concluded that the hexaploid triticale is a useful tester for critical distinction among the B, D, D2 and S type cytoplasms.抄録全体を表示PDF形式でダウンロード (542K) -
Takao K. WATANABE, Yutaka INOUE, Masayoshi WATADA1984 年 59 巻 3 号 p. 225-235
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーDrosophila simulans has been found for more than 10 years in Japan, mainly in suburban areas whereas its sibling species D, melanogaster tends to be found in houses. Seasonal activities of the two species were clearly different; In a typical hot summer the frequency of D. simulans decreased temporarily in August making two peaks in July and September. But in a cool summer the two peaks disappeared making a single peak in September or October. On the other hand, D. melanogaster showed higher activity in August in the hot summer but it occasionally shifted the active peak during the season avoiding competition with D. simulans. A nine year survey of D. simulans around the area of Mt. Fuji revealed that the species gradually invaded from the Pacific coast to the inland. Population size in autumn was strongly affected by the temperature of the Preceeding winter. Cold winters such as in 1977 and 1981 decreased the size drastically at every collection site.抄録全体を表示PDF形式でダウンロード (489K) -
VII. Sex-specific lethals that do not affect dosage compensationTadanobu OKUNO, Taeko SATOU, Kugao OISHI1984 年 59 巻 3 号 p. 237-247
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーAutosomal, non-maternal effect, sex-specific lethals of Drosophila melanogaster were examined by lactic-aceto-orcein staining and 3H-uridine incorporation autoradiography of larval salivary gland chromosomes. Two classes of lethals were revealed. One class, which affects dosage compensation, in addition to the male-specific lethals, mle, msl-1, and msl-2 reported previously by Belote and Lucchesi (1980a), now includes a male-specific lethal, mle(3)132. The other group which shows normal dosage compensation is a new group and includes a male-specific lethal, C52, and a female-specific lethal, fle(3)100. A possible action of the lethals in the latter group is discussed.抄録全体を表示PDF形式でダウンロード (481K) -
Yonetaro MAEDA1984 年 59 巻 3 号 p. 249-257
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーPhenotypic expressions of a mutant unextended (uex, 2-55) of Drosophila melanogaster were examined. Four major morphological abnormalities are associated with this mutant; (1) unexpanded wings, (2) insufficiently extended third legs, (3) vertically oriented postscutellars and indented posterior end of scutellum, and (4) broad thorax-abdomen junction. It was noted that all these abnormalities are reminiscent of normal pharate adult morphology. High temperature treatment was effective, though to a limited degree, to expand the wings if given on the second day after pupariation. Mechanical pressure was found to remedy the wing abnormality but not others. A possibility that the abnormal timing in cuticle hardening following eclosion might cause all the abnormalities is discussed.抄録全体を表示PDF形式でダウンロード (700K) -
Toshiro SUGAI1984 年 59 巻 3 号 p. 259-262
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーThere are many examples of the occurrence of synchronous mitosis in multinucleate cells. If the induction of synchronous meiosis in nuclei in a single cell is possible, it would be usefully for the study of meiotic control. A temperature sensitive, cytokinesis deficient mutant (cdaA) of Tetrahymena has many micronuclei or germ nuclei at non-permissive temperature. When the mutant cell conjugated with wild type cell, all micronuclei in the mutant cell entered meiosis synchronously, but the meiosis did not synchronize with that of the nucleus of the partner cell of conjugating pair.抄録全体を表示PDF形式でダウンロード (504K) -
Yuzuru OGUMA, Haruo KUROKAWA1984 年 59 巻 3 号 p. 263-265
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーOnly 2 first spermatocytes per cyst were found in natural populations of Drosophila kanekoi. So far as the observation was performed, this seemed to be the least number in drosophilid flies.抄録全体を表示PDF形式でダウンロード (537K) -
Kohji HASUNUMA, Kazuhiko FURUKAWA1984 年 59 巻 3 号 p. 267-284
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーA strain, KH 5-7, with complex chromosomal rearrangements was detected by the production of white ascospores. In crosses heterozygous for KH 5-7, 60 to 90% of the ascospores were aborted and about 40% of discharged tetrads were 0:8 (black: white) type. Whereas in homozygous crosses 0 to 10% of the ascospores were aborted. The strain KH 5-7 included an interstitial translocation and a chromosomal break point on the left arm of linkage group (LG) I. The interstitial translocation was suggested to lie between ser-3 and mating type locus (mt). The chromosomal break point was between nit-2 and leu-3 and the resulting chromosome fragment translocated to the right arm of LG VII in between un-10 and nt. By the breakage of the right arm of LG VII, the resulting chromosome fragment translocated to the right arm of LG VI in between pan-2 and trp-2. The resulting chromosome fragment of the right arm of LG VI translocated to the left arm of LG I in between leu-3 and nit-2. The direction of attachment of the left arm of LG I to the right arm of LG VII was met-7, un-10 (LG VII), break point nit-2, un-5 and fr (LG I).抄録全体を表示PDF形式でダウンロード (527K) -
Akio HYODO, Toshio YAMAMOTO, Hitoshi UEDA, Fusaho TAKEI, Ken-ichi KIMU ...1984 年 59 巻 3 号 p. 285-296
発行日: 1984年
公開日: 2006/07/25
ジャーナル フリーThe fibroin light chain of an inbred strain of Bombyx mori was shown to give a single band on SDS-polyacrylamide gel electrophoresis by a Laemmli system. From the electrophoretic mobility of the band, fibroin light chains from various inbred strains of the silkworm were classified into three groups, A, B and C. Linkage analysis of the fibroin light chain gene was performed by observing the relevant phenotypes, using a silkworm strain of Tamanashikasuri (light chain phenotype C) and sixteen silkworm stocks (light chain phenotype A or B) carrying genetic markers on each chromosome. The fibroin light chain gene was not linked to the fibroin H chain gene locating on the 25th chromosome carrying the Nd(2) mutation, but was found to be linked to the U gene locating on the 14th chromosome.抄録全体を表示PDF形式でダウンロード (887K)
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