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アオワカメとワカメの雑種について


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Title: アオワカメとワカメの雑種について
Other Titles: Studies on Artifical Hybrids between Undaria peterseniana (KJELLM.) OKAM. and U.pinnatifida (HARV.) SUR.
Authors: 右田, 清治
Authors (alternative): Migita, Seiji
Issue Date: Dec-1967
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.24, pp.9-20; 1967
Abstract: Undaria pinnatifida (HARV.) SUR., U. undarioides (YENDO) OKAM. and U. peterseniana (KJELLM.) OKAM. are members of the genus of Undaria, Laminariales. They are confined to Japan and are useful algi as human food. In recent years, SAITO3) expereimented on possibility of artifical crossing among three species of Undaria, and succeeded to grow the hybrids in the sea. The present paper deals with the artifical crossing between U. peterseniana and U. pinnatifida. The results of studies are summarized as follows: Artifical crossing between U. peterseniana ♀ and U. pinnatifida ♂ were successful and many hybrids were obtained at the cultivation in the sea. The hybrids are intermediate between their parental species not ohly morphologically but also ecologically. All grown-up hybrids produced sporangial sori mainly on the sporophyll at the lowest margin of blade. Morphological and ecological aspects of the gametophytes from the hybrids are almost similar to those of the parental species. At the first nuclear division in the zoosporangia of U. pinnatifida, U. peterseniana and the hybrids, thirty chromosomes each were counted. / アオワカメとワカメの交雑実験を行ない,その結果えられた雑種の形態や生長,成熟などについて調査した. 1 アオワカメ♀とワカメ♂の交雑で多くの雑種が発生した. 2 雑種の形態はアオワカメとワカメの中間的な特徴を示す. すなわち,雑種の体長はワカメより長くアオワカメより短かく,葉幅が広いのでアオワカメの重量の軽い欠点は雑種ではかなり改善された. 3 雑種の遊走子嚢は茎の上部で葉に連続して形成される成実葉につくられる場合が多い. 4 雑種の遊走子放出時期はワカメより遅くアオワカメより早期である. 5.雑種の配偶体の形態や生態はワカメ,アオワカメとほとんど同様である. 6 実験に供したアオワカメ,ワカメおよび雑種の半数染色体数はいずれも30であった.
URI: http://hdl.handle.net/10069/31355
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第24号

Citable URI : http://hdl.handle.net/10069/31355

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