Triticum araraticum Jakubz.における相互転座からみた6染色体型〔英文〕

スポンサーリンク

概要

• 論文の詳細を見る

• The chromosome structures of eight strains of T. araraticum collected in southeastern Turkey and Northern Iraq were analyzed by hybridization with three chromosome type tester strains; the A type of araraticum 196-1, the B type of timopheevi 107-1 and the C type of araraticum 1908A. Concurrently, the chromosome pairings of hybrids of eight araraticum strains were observed.Results of the present experiment clearly show that of the eight strains studied, four were the B type. The remaining four strains were classified into three chromosome types different from the A, B and C types. These were designated the D, E and F types. A tetravalent was formed in the PMCs of hybrids between the B and D types and between the B and E types. A hexavalent was observed in hybrids between the D and E types, between the E and F types and between the B and F types. Two tetravalents were recognized in hybrids between the A and D types and between. the C and E types. A hybrid between the D and F types showed an octavalent formation at meiosis. Both a tetravalent and a hexavalent were observed in a hybrid between the A and F types.Reduced seed fertility in hybrids of the strains of T. araraticum seems to be caused by meiotic irregularities such as polyvalent formations. The seed fertilities of hybrids between the B type strains of T. araraticum and T. timopheevi varied from almost sterile to fully fertile. An araraticum strain collected near Hozat, Turkey, was found to be fully fertile when crossed with T. timopheevi. This provides evidence for the theory that T. araraticum is the ancestral species of cultivated T. timopheevi.This study has clearly shown that chromosome differentiation in T. araraticum is more abundant in Northern Iraq than in Transcaucasus. This would indicate that the Timopheevi group of tetraploid wheats first originated in the eastern part of the Fertile Crescent and that later its distribution area was extended northward to the Transcaucasus.

• 日本遺伝学会の論文

著者

• KAWAHARA Taihachi

  Plant Germplasm Institute, Graduate School of Agriculture, Kyoto University

• TANAKA MASATAKE

  Plant Germ-plasm Institute, Faculty of Agriculture, Kyoto University

• Kawahara Taihachi

  Plant Germ-plasm Institute Faculty Of Agriculture Kyoto University

• 河原 太八

  Plant Germ-plasm Institute, Faculty of Agriculture, Kyoto University

• 田中 正武

  Plant Germ-plasm Institute, Faculty of Agriculture Kyoto University

関連論文

• Genetic diversity and origin of timopheevi wheat inferred by chloroplast DNA fingerprinting
• Chloroplast and nuclear DNA variation in common wheat : insight into the origin and evolution of common wheat
• 野生2倍性コムギにおける染色体相互転座〔英文〕
• エンマ-コムギにおける相互転座による染色体型の同定-3-Triticum dicoccoides No.6染色体型〔英文〕
• Triticum araraticum Jakubz.における相互転座からみた6染色体型〔英文〕
• Fructan Content in Aegilops cylindrica and its Relationship to Snow Mold Resistance and Freezing Tolerance(Crop Physiology and Ecology)
• B染色体の利用によるAegilops speltoidesと四倍性コムギ間の染色体の相同性の評価〔英文〕
• Triticum araraticumの2型と他の4倍性コムギとの細胞遺伝学的関係〔英文〕
• Quantitative variation of Revolver transposon-like genes in synthetic wheat and their structural relationship with the LARD element
• Molecular phylogeny among Triticum-Aegilops species and of the tribe Triticeae
• 4倍性コムギにおけるCsクロロシスの遺伝学的研究〔英文〕
• KOMUGI Database-Wheat Genetic Resources Database
• Natural variation of morphological traits in wild wheat progenitor Aegilops tauschii Coss.

もっと見る 閉じる

スポンサーリンク