Chromosome constitution of two karyotypes in Vicia macrocarpa.
スポンサーリンク
概要
- 論文の詳細を見る
The chromosome complements of two cytotypes of Vicia macrocarpa were investigated and it was observed that the karyotypes changed in relation to the position of centromere, length of chromosome arms and number and nature of nucleolar chromosomes. At the same time changes in some morphological and physiologlcal characters of the plants were also observed. In addition, the two chromosome complements were studied for their banding pattern at the mitotic prophase and metaphase. It was evident that the two cytotypes also showed differences in the amount and distribution of heterochromatin. One of the cytotypes (12E) exhibited a larger number of C-bands than the other (12C). It is concluded that the evolution of V.macrocarpa has been towards a decrease of the amount of heterochromatin, along with the changes of the karyotype. Various multivalents ranging frorn trivalents to hexavalents were observed in some cells at the meiosis in the F<SUB>1</SUB> and F<SUB>3</SUB> of 12Cxl2E. It was thus d.emonstrated that the two cytotypes differed by the presence of two reciprocal translocations. It was possible to identify the parent-derived individual chromosomes at both the mitotic stages and meiosis of the F<SUB>3</SUB> plants based on the differences in the heterochromatic bands ancl centromere position. The extra-chromo some of a trisomic plant in the F<SUB>3</SUB> was identified at the mitotic prophase as well as the chromosomes involvecl in the multivalents at the meiosis of the hybrids.
- 日本育種学会の論文
日本育種学会 | 論文
- 根粒超着生変異品種作系4号の親子鑑定
- 物性測定のための米一粒による炊飯方法の開発
- いもち病抵抗性に関する同質遺伝子系統「コシヒカリ新潟BL」のDNAマーカーによる品種判別
- 巨大胚水稲新品種「はいみのり」の育成
- イネ低アミロース系統の登熟気温による胚乳アミロース含有率変動の系統間差異