若雌豚の背脂肪層の厚さと繁殖性の関係

三上 仁志; 甲斐 勝利; 佐藤 勲

doi:10.2508/chikusan.46.68

若雌豚の背脂肪層の厚さと繁殖性の関係

三上仁志, 甲斐勝利, 佐藤勲

著者情報

ジャーナルフリー

46 巻 (1975) 2 号 p. 68-72

DOI https://doi.org/10.2508/chikusan.46.68

詳細

公開日
公開日: 2008/03/10 [早期公開] 公開日: - 受付日: 1974/08/15 改訂日: - 受理日: -
訂正情報
訂正日: 2008/03/10 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : Data from sixty-seven Landrace gilts which had their first litters in the spring of 1972 and 1973 were used to investigate the relationship of backfat thickness to litter size and average pig weight at birth and at two weeks of age. Backfat thickness was measured by ultrasonics as described in the previous pape⁴) at 90kg, breeding and farrowing. The correlations of backfat thickness with body weight were 0.503 and 0.527 at breeding and farrowing, respectively. Breeding weight and farrowing weight were not significantly correlated with those reproductive traits. Weight gain of gilts during pregnancy was correlated with average birth weight (r=0.264), but not significantly correlated with litter size and average two weeks weight of piglets. Backfat thickness at 90kg and at breeding was not associated with litter size and average pig weight at birth and at two weeks of age. Howewer, backfat thickness per body weight at breeding was found to be negatively correlated with litter size at birth(r=-0.255) and at two weeks (r=-0.248). The relationship between the rate of backfat deposition in relation to body weight from 90kg to breeding and litter size at birth was not linear. There was a tendency for litter size at birth to decrease when the backfat gain in the period was greater than 0.2mm per body weight gain (kg). It was also found that backfat thickness per body weight at farrowing was correlated with litter size at birth (r=-0.357) and at two weeks (r=-0.259), and with average birth weight (r=0.285) while backfat thickness at farrowing was correlated only with average birth weight (r=0.338).
Right : Data from sixty-seven Landrace gilts which had their first litters in the spring of 1972 and 1973 were used to investigate the relationship of backfat thickness to litter size and average pig weight at birth and at two weeks of age. Backfat thickness was measured by ultrasonics as described in the previous pape⁴⁾ at 90kg, breeding and farrowing. The correlations of backfat thickness with body weight were 0.503 and 0.527 at breeding and farrowing, respectively. Breeding weight and farrowing weight were not significantly correlated with those reproductive traits. Weight gain of gilts during pregnancy was correlated with average birth weight (r=0.264), but not significantly correlated with litter size and average two weeks weight of piglets. Backfat thickness at 90kg and at breeding was not associated with litter size and average pig weight at birth and at two weeks of age. Howewer, backfat thickness per body weight at breeding was found to be negatively correlated with litter size at birth(r=-0.255) and at two weeks (r=-0.248). The relationship between the rate of backfat deposition in relation to body weight from 90kg to breeding and litter size at birth was not linear. There was a tendency for litter size at birth to decrease when the backfat gain in the period was greater than 0.2mm per body weight gain (kg). It was also found that backfat thickness per body weight at farrowing was correlated with litter size at birth (r=-0.357) and at two weeks (r=-0.259), and with average birth weight (r=0.285) while backfat thickness at farrowing was correlated only with average birth weight (r=0.338).

訂正日: 2008/03/10 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

訂正日: 2008/03/10 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : Data from sixty-seven Landrace gilts which had their first litters in the spring of 1972 and 1973 were used to investigate the relationship of backfat thickness to litter size and average pig weight at birth and at two weeks of age. Backfat thickness was measured by ultrasonics as described in the previous pape⁴) at 90kg, breeding and farrowing. The correlations of backfat thickness with body weight were 0.503 and 0.527 at breeding and farrowing, respectively. Breeding weight and farrowing weight were not significantly correlated with those reproductive traits. Weight gain of gilts during pregnancy was correlated with average birth weight (r=0.264), but not significantly correlated with litter size and average two weeks weight of piglets. Backfat thickness at 90kg and at breeding was not associated with litter size and average pig weight at birth and at two weeks of age. Howewer, backfat thickness per body weight at breeding was found to be negatively correlated with litter size at birth(r=-0.255) and at two weeks (r=-0.248). The relationship between the rate of backfat deposition in relation to body weight from 90kg to breeding and litter size at birth was not linear. There was a tendency for litter size at birth to decrease when the backfat gain in the period was greater than 0.2mm per body weight gain (kg). It was also found that backfat thickness per body weight at farrowing was correlated with litter size at birth (r=-0.357) and at two weeks (r=-0.259), and with average birth weight (r=0.285) while backfat thickness at farrowing was correlated only with average birth weight (r=0.338).
Right : Data from sixty-seven Landrace gilts which had their first litters in the spring of 1972 and 1973 were used to investigate the relationship of backfat thickness to litter size and average pig weight at birth and at two weeks of age. Backfat thickness was measured by ultrasonics as described in the previous pape⁴⁾ at 90kg, breeding and farrowing. The correlations of backfat thickness with body weight were 0.503 and 0.527 at breeding and farrowing, respectively. Breeding weight and farrowing weight were not significantly correlated with those reproductive traits. Weight gain of gilts during pregnancy was correlated with average birth weight (r=0.264), but not significantly correlated with litter size and average two weeks weight of piglets. Backfat thickness at 90kg and at breeding was not associated with litter size and average pig weight at birth and at two weeks of age. Howewer, backfat thickness per body weight at breeding was found to be negatively correlated with litter size at birth(r=-0.255) and at two weeks (r=-0.248). The relationship between the rate of backfat deposition in relation to body weight from 90kg to breeding and litter size at birth was not linear. There was a tendency for litter size at birth to decrease when the backfat gain in the period was greater than 0.2mm per body weight gain (kg). It was also found that backfat thickness per body weight at farrowing was correlated with litter size at birth (r=-0.357) and at two weeks (r=-0.259), and with average birth weight (r=0.285) while backfat thickness at farrowing was correlated only with average birth weight (r=0.338).

訂正日: 2008/03/10 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

抄録

67頭のランドレース種若雌隊の超音波で測定した背脂肪層の厚さと生時,2週時の1腹子豚数および平均子豚体重との関係を調べた.交配時および量娩時の体重と背脂肪層の厚さの間には,それぞれ0.503と0.527の相関が見られたが,若雌豚の体重と繁殖性との間では,妊娠中の体重増加量と生時の子豚体重との間に0.264の相関が認められた以外に統計的に有意な相関は見られなかった.交配時の背脂肪層の厚さ自体は,いずれの繁殖形質とも有意な相関は示さなかったが,体重あたりの厚さは生時,2週時の子豚数とそれぞれ-0.255,-0.248の相関を示した.90kgから交配時までの体重あたりの背脂肪層の増加率と生時の子豚数との関係は直線的でなく,体重1kgあたり0.2mm以上の増加をした個体は子豚数が少なくなる傾向を示した。分娩時の背脂肪層の厚さは,性時の平均子豚体重と0.338の相関を示し,体重あたりの厚さは生時,2週時の子豚数および生時の平均子豚体重と,それぞれ-0.357,-0.259,0285の相関を示した.

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