Cytological study of two peculiar hybrids found in natural populations of Crepidiastrum Keiskeanum

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概要

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• Two intergeneric hybrids found among the natural population of Crepidiastrum Keiskeanum in Izu were studied cytologically. Simoda 4 seems to be a hybrid between C. Keiskeanum and Paraixeris denticulata. The cells with 10, 8, 7, 5 chromosomes are observed in root tips of this individual in a chimeral state. Misaki 3 considered to be a hybrid between C. keiskeanum and Lactuca squarrosa, consists of the cells with 18, 17, 15, 14 chromosomes. Not only the number of chromosomes but their karyotypes are different from cell to cell even in one individual.

• 日本遺伝学会の論文

著者

• 小野 記彦

  東京都立大学理学部生物学教室

• 酒井 文三

  東京都立大学理学部生物学教室

関連論文

• 細胞性粘菌の発生異常突然変異体による分化の研究
• Intergeneric hybridization in Cichorieae:An award lecture at the annual meeting of the Genetics Society of Japan, held in Okayama, Oct. 16-18, 1955
• Cytological study of two peculiar hybrids found in natural populations of Crepidiastrum Keiskeanum
• Curing of chromosome fragmentation in Paraixeris denticulata×Crepidiastrum Keiskeanum (a preliminary report)
• Further studies of the hybrids, Paraixeris denticulata×Lactuca squarrosa
• The hybrids of Crepidiastrum platyphyllum and C. Keiskeanum

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