Lampbrush Chromosomes of Rana nigromaculata, R. brevipoda, R. plancyi chosenica, R. p. fukienensis and their Reciprocal Hybrids

スポンサーリンク

概要

• 論文の詳細を見る

• Landmarks and chiasmata of lampbrush chromosomes were observed in the oocytes of female Rana nigromaculata, (N) NN, R. brevipoda, (B) BB, R. plancyi chosenica, (C) CC, and R. p. fukienensis, (F) FF, and in those of 12 kinds of hybrids produced from these species and subspecies. The lampbrush chromosomes of the three species and one subspecies are not always parallel to their mitotic chromosomes in morphological characters. The lampbrush chromosomes of Rana plancyi chosenica are peculiar in extreme scarcity of landmarks and remarkably differ from the conspecific R. p. fukienensis at nearly the same degree as the other two species. (N) NN, (B) BB, (C) CC and (F) FF had all 13 bivalents in each of 50 oocytes and were 38.5,38.7,42.5 and 38.2,respectively, in the mean number of chiasmata of the 13 bivalents. When compared with the parental species and subspecies, all the 12 kinds of hybrids among them were fewer in the number of oocytes having 13 bivalents as well as in the mean number of chiasmata found in the 13 pairs of homologous chromosomes. These fewer numbers in bivalents and chiasmata are attributable to the differences between the lampbrush chromosomes of the two parental species or subspecies. On the other hand, the difference between reciprocal hybrids in the number of oocytes having 13 bivalents and the mean number of chiasmata in the 13 pairs of homologous chromosomes seems to be attributable to a difference in cytoplasm between the two parental species or subspecies.

• 広島大学の論文

著者

• OHTANI Hiromi

  Laboratory for Amphibian Biology, Faculty of Science, Hiroshima University

• Ohtani H

  Laboratory For Amphibian Biology Faculty Of Science Hiroshima University

• Ohtani Hiromi

  Laboratory For Amphibian Biology Faculty Of Science Hiroshima University

関連論文

• Differentiation of 70 Populations in the Rana nigromaculata Group by the Method of Electrophoretic Analyses
• Molecular Cloning of cDNA for the ζ Isoform of the 14-3-3 Protein : Homologous Sequences in the 3^I-Untranslated Region of Frog and Human ζ Isoforms
• Chromosomes and the Sites of Five Albino Gene Loci in the Rana nigromaculata Group
• Hybridogenetic Reproduction of Allotriploids between Japanese and European Pond Frogs(Developmental Biology)
• Detection of Chromosomes Bearing the Loci for Seven Kinds of Proteins in Japanese Pond Frogs
• Detection of Chromosomes Bearing the Loci for Blue and Olive Mutations in Rana nigromaculata
• Polymorphism of Lampbrush Chromosomes in Japanese Populations of Rana nigromaculata
• Lampbrush Chromosomes of an Allotriploid Frog Produced from(Rana brevipoda×Rana nigromaculata)♀×Rana breviooda♂(短報)
• Lampbrush Chromosomes of Rana nigromaculata, R. brevipoda, R. plancyi chosenica, R. p. fukienensis and their Reciprocal Hybrids
• Speciation of Japanese Pond Frogs Deduced from Lampbrush Chromosomes of their Diploid and Triploid Hybrids

スポンサーリンク