Abstract
Abstract. Title of the paper. Genetic association between individual feed intake during Performance test and reproductions traits in pigs The present study deals with the estimation of genetic correlations between Performance test traits measured in boars and reproduction traits of their offspring (sibs) of two purebred lines. Performance traits were individual feed intake (FI) recorded by electronic feeder, feed conversion ratio (FCR), average daily gain (ADG) and backfat thickness (BF). Reproduction traits were number of total piglets born (NBT) and born alive (NBA) Data of 4869 young boars, Performance tested between April 1992 and May 1997 and data of 9710 primiparous sows farrowed between June 1994 to November 1998, were observed. Heritabilities of Performance traits recorded on Station were in line 03 (line 04) h2 = 0.24 (0.33), 0.33 (0.33), 0.23 (0.32) and 0.47 (0.53) for FI, ADG FCR and BF, respectively. Heritabilities of reproduction traits such as NBT, NBA were in line 03 (line 04) h2 = 0 05 (0.08) and 0.05 (0.06), respectively. Genetic correlation between individual feed intake and reproduction traits ranged between rg = 0.12 and 0.27. Undesirable genetic correlations were found between reproduction traits and feed efficiency (rg = 0.13 to 0.44), backfat thickness (rg = 0.07 to 0.25) and partly average daily gain (rg = −010 to 0.09). Line 04 showed lowest magnitude of feed intake and highest genetic antagonism between production and reproduction traits. It is suggested that feed intake capacity is a limiting factor for reproduction in line 04 and genetic antagonism between production and reproduction traits increases with reduction in feed intake.
Highlights
The present study deals with the estimation of genetic correlations between Performance test traits measured in boars
Performance tested between April 1992
May 1997 and data of 9710 primiparous sows farrowed between June 1994 to November 1998
Summary
Die genetische Korrelation zwischen individueller FUA und Reproduktionsmerkmalen lag im Bereich von rg = 0,12 bis 0,27. Außerdem ist von Interesse wie weitere Mastleistungsmerkmale wie tägliche Zunahme und Futterverwertung sowie das Schlachtkörperwertmerkmal Rückenspeckdicke von eigenleistungsgeprüften Jungebern zur Fruchtbarkeitsleistung der Nachkommen in genetischer Beziehung stehen. Mittelwerte ( x ) und Standardabweichungen (s) der Mastleistung und des Schlachtkörperwertes von Ebern der Linien 03 und 04 (Means (x) and Standard deviations (s) of fattening Performances and backfat thickness of boars for lines 03 and 04). Mittelwerte (x) und Standardabweichungen (s) der gesamt geborenen und lebend geborenen Ferkel von Jungsauen in den Linien 03 und 04 (Means (x) and Standard deviations (s) of total born and born alive piglets of gilts for lines 03 and 04). Linie 03 (Genetic connectedness of animals with fattening or reproduction Performances in line 03)
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