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Chromosome Numbers of Five Species of the Marattiaceae in Taiwan

台灣產五種觀音座蓮舅科植物之染色體數目

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摘要


本文觀察台灣產5種觀音座蓮舅科植物之染色體數目。觀音座蓮(2n=80)、蘭嶼觀音座蓮(2n=80)及觀音座蓮舅(2n=78)為二倍體,伊藤氏原始觀音座蓮為三倍體(2n=120),台灣原始觀音座蓮為四倍體(2n=160)。這些染色體數目與已往之研究證據均支持伊藤氏原始觀音座蓮為觀音座蓮與台灣原始觀音座蓮之雜交後代的假說。

並列摘要


The chromosome numbers of root tips of all 5 species of the Marattiaceae in Taiwan weredetermined. Results showed that Angiopteris lygodiifolia (2n=80), Angiopteris palmiformis (2n=80), and Marattia pellucida (2n=78) are diploid; Archangiopteris itoi is triploid (2n=120), and Archangiopteris somai is tetraploid (2n=160). These chromosome numbers together with previous evidence support the hypothesis that Archangiopteris itoi is a hybrid between Angiopteris lygodiifolia and Archangiopteris somai.

並列關鍵字

Chromosome number Marattiaceae ploidy Taiwan

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