イネ属植物の細胞遺伝学的研究-8-E,Dゲノム間の関係〔英文〕

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  • Cytogenetical studies on the genus Oryza. XIII. Relationship between the genomes E and D.
  • イネゾク ショクブツ ノ サイボウ イデンガクテキ ケンキュウ 8 E D ゲ
  • XIII. Relationship between the genomes E and D

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To clarify the relationship between E genome of Oryza australiensis and D genome of CCDD genome species, F1 hybrids of O. officinalis (CC)×O. australiensis (EE), CE plant×CCDD genome species and amphiploid CCEE× CCDD genome species were studied. CE plant was morphologically similar to O. australiensis than to O. officinalis, and the F1 hybrids of CE plant×CCDD genome species and of amphiploid CCEE×CCDD genome species were similar to the CCDD genome species. Somatic chromosome numbers in the F1 hybrids of CE plant×CCDD genome species ranged from 46 to 72. Those of the hybrids of O. officinalis×O. australiensis and amphiploid CCEE×CCDD genome species were 24 and 48, respectively. At MI chromosome differences in size were observed in the F1 hybrid of O. officinalis×O. australiensis. Number of bivalents at MI of the F1 hybrids having 48 chromosomes (2n) obtained from the cross between CE plant and CCDD genome species ranged from 15 to 23 with a mean of 18.2 (CES-4) to 19.9 (CES-15), while that from the cross between amphiploid CCEE and CCDD genome species ranged from 8 to 24 with a mean of 17.6 (C-1) to 20.9 (B-1). The above results suggest that the genomes E and D may be closely related.

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