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No.38 (1991/12) >

 
Title :豚の成長に伴う体型測定値に対する主成分分析(生物生産学科)
Title alternative :Principal component analysis of body measurements at different growth stages in the Landrace breed of swine (Department of Bioproduction)
Authors :新城, 明久
寺田, 直樹
笹沼, 清孝
古田, 賢治
Authors alternative :Shinjo, Akihisa
Terada, Naoki
Sasanuma, Kiyotaka
Furuta, Kenji
Issue Date :4-Dec-1991
Abstract :成長に伴う豚の体型の変化を明らかにするため,ランドレース種の体重及び体長や体高など6部位の体型測定値より主成分を算出した。材料は第14回・15回・16回沖縄県畜産共進会に出品されたランドレース種の未経産雌(8∿11カ月齢),経産雌(13∿29カ月齢),若齢雄(10∿14カ月齢)及び壮齢雄(15∿27カ月齢)であった。これらの豚の体重と体型測定値間の相関行列に対し主成分分析を適用した。得られた結果は,以下の通りである。1. 寄与率は第1主成分が79.7%,第2主成分が9.4%であった。第1主成分は大きさ因子,第2主成分は形因子と解釈された。2. 主成分得点を比較すると,第1主成分は経産雌が未経産雌より,壮齢雄が若齢雄より有意に大きかった。第2主成分は,未経産雌と経産雌及び若齢雄と壮齢雄間に有意差は認められなかった。3. 成長によりランドレース種は体格は大きくなったが,体型に変化はみられなかった。
This Study were conducted to investigate change of body size and shape in swines following their growth. The data were obtained from the Landrace swine that exhibited in the Okinawa Animal Show in 1988 to 1990. The animals were classified by age in month. They were gilts that were from 8 to 11 ages, sows that were from 13 to 29 ages, immature boars that were from 10 to 14 ages, mature boars that were from 15 to 27 ages. Principal component analysis was applied for body weight and six body sections measured. The results were summarized as follow. 1. The first and second principal components accounted for 79.7% and 9.4% of the variation in body weight and body measurements, respectively. The first principal component was size factor contrasting large or small body frame. The second principal component was short body, and short or tall. 2. Sow was larger than gilt in the first and the second principal component score. The mature boar was larger than the immature in the first principle component, but those boars not differed in the second principal component score. 3. The body frame of Landrace was large, but body shape did not vary as swine grew older.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/3827
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.38 p.13 -16
Appears in Collections:No.38 (1991/12)

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