ハンガリー在来ブタ(Mangalica)とLandrace雌ブタの排卵期における卵胞・卵母細胞の発育・成熟と生殖ホルモン分泌の比較
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概要
- 論文の詳細を見る
Only a very small amount of physiological data is available about the low fertility (mean litter size is 5.7 ± 0.8) of Hungarian native breed, Mangalica (M), sows. The aim of the present paper is to reveal the differences in preovulatory follicle development and intrafollicular oocyte maturation between M and Landrace (L) gilts, with special reference to the peri- and postovulatory secretion and peripheral concentrations of estradiol-17β (E2), progesterone (P4), and luteinizing hormone (LH). The number of preovulatory follicles was 6.8 ± 1.4 and 19.6 ± 6.6 in M and L gilts, respectively. A lower degree of cumulus expansion and a lower percentage of mature oocytes (TI/M II) was noted in M. Higher LH and E2 peak levels, a longer E2 to LH peak interval, and lower embryo survival was confirmed. Interestingly, despite the lower number of corpora lutea, a higher peripheral blood level of P4 was shown in M than in L gilts. Both diminished follicular development and protracted oocyte maturation may be involved in low fecundity in M, and the present findings may explain these reproductive phenomena.
- 日本繁殖生物学会の論文
著者
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MANABE Noboru
Research Unit of Animal Life Sciences, Animal Resource Science Centre, The University of Tokyo
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BRUSSOW Klaus-Peter
FBN Research Institute for the Biology of Farm Animals
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TORNER Helmut
FBN Research Institute for the Biology of Farm Animals
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RATKY Jozsef
Research Institute for Animal Breeding and Nutrition
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Ratky Jozsef
Res. Inst. For Animal Breeding And Nutrition
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BRUSSOW Klaus-Peter
Research Institute for the Biology of Farm Animals
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EGERSZEGI Istvan
Research Institute for Animal Breeding and Nutrition
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SCHNEIDER Falk
FBN Research Institute for the Biology of Farm Animals
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SOLTI Laszlo
Department of Obstetrics and Reproductive Biology, Faculty of Veterinary Science, Szent Istvan Unive
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Bruessow K‐p
ドイツ国立デュマスドルフ家畜研究所繁殖部
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Bruessow Klaus-peter
ドイツ
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Solti Laszlo
Department Of Obstetrics And Reproductive Biology Faculty Of Veterinary Science Szent Istvan Univers
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Manabe Noboru
Research Center For Food Safety Graduate School Of Agricultural And Life Sciences The University Of
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MANABE Noboru
Research Unit of Animal Life Sciences, Animal Resource Center, The University of Tokyo
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