巻号一覧
45 巻, 6 号
選択された号の論文の4件中1～4を表示しています
- |<
- <
- 1
- >
- >|
-
YUICHI TANABE, YOSHINORI TAMAKI, SHIGERU NAKANO1970 年 45 巻 6 号 p. 425-428
発行日: 1970年
公開日: 2007/05/21
ジャーナル フリーAgar-gel electrophoresis revealed species specific difference in esterase isozymes of seven species of bees and wasps; Apis mellifera, Apis indica japonica, Xylocopa appendiculata circumvolans, Anthophora quadrifasciata, Polistes chinensis antennalis, Polistes jadwigae and Megachile nipponica. Esterase isozymes of two species of Apis bees and two species of Polistes wasps are acetylcholine esterases. Esterase activity of the female tissue was much higher than that of the male both in Apis mellifera and in Polistes jadwigae.抄録全体を表示PDF形式でダウンロード (1045K) -
YUKIMASA SHIRAISHI1970 年 45 巻 6 号 p. 429-442
発行日: 1970年
公開日: 2007/05/21
ジャーナル フリーThe present study was made to determine the detailed karyotype based on the differential reactivities of human leucocyte chromosomes treated with low temperature. The treated chromosomes were clearly exhibited many prominent special segments including secondary constrictions, and those segmental patterns were arranged in a regular sequence along the individual chromosome length.
Another important observation is that the so-called X-chromosome carried the specific segmental patterns with the highest frequency among the C group. It is resulted that the present low temperature treatment is very useful for the distinction of the individual chromosomes of the human complements.抄録全体を表示PDF形式でダウンロード (5177K) -
ISAO YOSHIKAWA, TERUMI MUKAI1970 年 45 巻 6 号 p. 443-455
発行日: 1970年
公開日: 2007/05/21
ジャーナル フリーHeterozygous effects of lethal genes on viability in Drosophila melanogaster were examined using 81 second chromosomes carrying newly arisen lethal genes and 49 second chromosomes carrying lethal genes extracted from a Raleigh, N. C. population. The same number of lethal-free control chromosomes were employed. The following findings were obtained: (1) No evidence of superiority of lethal heterozygotes over the control was obtained in either almost completely homozygous or in intra- and interpopulational heterozygous genetic backgrounds. (2) The average degrees of dominance of lethal genes (h) are probably negatively correlated with the viabilities of their genetic backgrounds. The h values were 0.0076-0.038 for newly arisen lethals and 0.0057 for lethals from the natural populations. (3) The newly arisen lethals that showed more deleterious effects in one genetic background seemed to be also more detrimental in all the other genetic backgrounds employed. (4) Significant synergistic interaction could not be observed when single individuals had two lethal genes. For the natural lethals, a clear linear relationship was observed between the average viabilities of heterozygotes and the numbers of lethal genes per individual, while in newly arisen lethals, a tendency of synergistic interaction was observed but not significantly so.
On the basis of the above findings and of the experimental results of Dobzhansky and Spassky (1968) and Oshima (1963), the behavior of lethal genes in natural populations was discussed.抄録全体を表示PDF形式でダウンロード (1460K) -
YASUSHI TAKENOUCHI1970 年 45 巻 6 号 p. 457-466
発行日: 1970年
公開日: 2007/05/21
ジャーナル フリーThe chromosomes of a weevil, Catapionus gracilicornis, were investigated based on the materials coming 29 localities covering Hokkaido and northern Japan with special regard to parthenogenesis and polyploidy. Hokkaido specimens were represented by a tetraploid parthenogenetic race. In Akita and Iwata Prefectures, tetraploid and pentaploid parthenogentic races coexisted. Both female and male specimens collected in Kayatsuki, Niigata Prefecture were all diploid bisexual race showing basic numbers, 22 in diploid and 11 in haploid.抄録全体を表示PDF形式でダウンロード (1253K)
- |<
- <
- 1
- >
- >|