イネ属の人為倍数体に関する細胞遺伝学的研究-6-不稔性複2倍体,Sativa-australiensis(AAEE)について〔英文〕
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概要
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A new amphiploid, sativa-australiensis (AAEE, 2n=48) was successfully synthesized by treating the young shoots with 0.05 % colchicine solution which were derived from the dormant buds on the stems of the F1 hybrid. In MI of PMCs in F1, some bivalents were observed. The modal chromosome configuration was 2II+20I. In amphiploid, most of PMCs examined formed the regular pairing of 24II. The remarkable difference was shown in chromosome size of amphiploid as well as F1. From the frequency of occurrence of heteromorphic bivalents in F1, it was infered that there are some homology between the chromosomes of O. sativa and O. australiensis. F1 ybrid was completely sterile. Amphiploid induced was also sterile, although it formed anthers seemingly normal in shape. At the stage immediately after tetrad, the fusion of microspores was observed as the result of the failure of cell wall formation. Multi-germ-pores were also observed on the pollen grains developed from the isolated microspores as well as the fused ones.
- 日本遺伝学会の論文
著者
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Wakasa Kyo
National Agriculture Research Center
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Watanabe Yoshio
National Agricultural Research Center (narc)
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渡辺 好郎
National Institute of Agricultural Sciences, Tohoku Nat.
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若狭 暁
National Institute of Agricultural Sciences
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WATANABE YOSHIO
National Institute of Agricultural Sciences
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- イネ属の人為倍数体に関する細胞遺伝学的研究-6-不稔性複2倍体,Sativa-australiensis(AAEE)について〔英文〕