ウシ卵巣の前胞状卵胞および胞状卵砲における卵胞と卵母細胞の成長に関する対比成長測定学的研究
スポンサーリンク
概要
- 論文の詳細を見る
We examined the relation between the growth of preantral and antral follicles and that of their oocytes in the ovaries of Holstein cows. We recovered follicles and oocytes (419 pairs) from the ovaries of 61 cows, and examined the relative growth relating the follicle diameter to the oocyte diameter by using six regression models for only healthy oocytes and all the oocytes including degenerated ones with and/or without zona pellucida. The best fitting model was found to be a hyperbolic regression (R2: 0.999). The differentiated equation for the hyperbolic curve in normal oocytes with zona pellucida and the follicles was found to be y=41.0/(x+0.253) 2: y and x are diameters of oocytes (μm) and follicles (mm), respectively. When follicles grew more than 4.0 mm in diameter, the growth rate of the oocytes calculated by the differentiation equation was found to be an asymptotic depression around zero. Thus, it is suggested that when the follicles grow more than 4.0 mm in diameter, the oocytes reach full size and cease to grow. Furthermore, it is considered that the equation can be applied to the assessment of normal growth in oocytes and follicles cultured in vitro.
- 日本繁殖生物学会の論文
著者
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NAGAI Takashi
National Institute of Livestock and Grassland Science
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MIYAMOTO Hajime
Unit of Anatomy and Cell Biology, Department of Animal Sciences, Kyoto University
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Nagai Takashi
Dep. Of Animal Breeding And Reproduction National Inst. Of Livestock And Grassland Sci.
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永井 卓
(独)・農業・生物系特定産業技術研究機構・畜産草地研究所
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永井 卓
独立行政法人 農業・食品産業技術総合研究機構 畜産草地研究所
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泉 徳和
Laboratory of Animal Reprodudction, Ishikawa Agricultural College
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榊田 星史
Laboratory of Animal Reprodudction, Ishikawa Agricultural College
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永井 卓
National Institute of Agrobiological Science
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IZUMI Tokukazu
Laboratory of Animal Reprodudction, Ishikawa Agricultural College
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SAKAKIDA Seishi
Laboratory of Animal Reprodudction, Ishikawa Agricultural College
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Nagai Takashi
National Inst. Of Livestock And Grassland Sci.
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Miyamoto Hajime
Unit Of Anatomy And Cell Biology Department Of Animal Sciences Kyoto University
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