Trends for Inbreeding in Polyploid Pteridophytes(<SPECIAL ISSUE>US-JAPAN SEMINAR : EVOLUTIONARY STUDIES ON SEXUAL SYSTEMS IN PLANTS)
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概要
- 論文の詳細を見る
Previous studies on the sequence of the gametangium formation in homosporous fern gametophytes (Masuyama, 1975a, b) suggested that diploid and polyploid taxa may favor gametophytic crossing and gametophytic selfing, respectively. In this view, intraspecific polyploids of three fern species (Phegopteris decursive-pinnata, Lepisorus thunbergianus and Pteris dispar) have been investigated for the amount of genetic load or the rate of gametophytic selfing. As expected, a marked contrast of mating systems is found between diploids and tetraploids ; the former predominantly undergo gametophytic crossing and the latter predominantly undergo gametophytic selfing. It seems likely that diploid homosporous pteridophytes favor gametophytic crossing with some exceptions favoring gametophytic selfing as a derived condition, whereas polyploid homosporous pteridophytes favor gametophytic selfing predominantly.
- 種生物学会の論文
- 1990-09-30
著者
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Watano Y
Chiba Univ. Chiba Jpn
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Watano Yasuyuki
Chiba Univ. Chiba Jpn
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Watano Yasuyuki
Department Of Biology Faculty Of Science Chiba University
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Watano Yasuyuki
Department Of Biology Faculty Of Science Kanazawa University
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Watano Y
Department Of Biology Faculty Of Science Chiba University
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MASUYAMA SHIGEO
Department of General Education, Tokyo Woman's Christian University
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Masuyama Shigeo
Department Of General Education Tokyo Woman's Christian University
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