The hybrids of Crepidiastrum platyphyllum and C. Keiskeanum

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概要

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• Crepidiastrum platyphyllum occurs only in Bôsô and Miura Peninsula, the northern limit of the genus. In the southern parts there occurs only Crepidiastrum Keiskeanum. The individualities of these species are presumed to be kept by the isolation, geographical or physiological or both. But the results of artificial hybridization of these two species eliminate the possibility of the physiological isolation.The studies of meiosis of this hybrid gave further examples of the residual pairing, which was abundantly observed in the progenies of intergeneric hybrids of the species of this group. The characteristic feature of the residual pairing is the diminution of multivalents during the progress of meiotic prophase, the result being the normal anaphase inspite of the occurrence of many multivalents at diplotene.

• 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

• 永井 静江

  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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