Candidate gene markers for reproductive traits in polish 990 pig line

Summary The follicle-stimulating hormone (FSHB), the prolactin (PRL) and prolactin receptor (PRLR) genes were examined as candidate genes for swine reproductive traits. The experimental material included 444 sows of the Polish synthetic line 990. The following traits were included in the study: total number born (TNB), number born alive (NBA) number of piglets at 21 days of age (NP21), number of weaned piglets, litter weight at 21 days of age, litter weight at weaning. The PRL locus genotype was found to have a significant effect (p ≤ 0.01) on the TNB, NBA and NP21 based on analysis of sows records from second and later parities. The effect of PRLR genotype was significant (p < 0.05) for the NBA for sows during first parity. No significant effects of the FSHB sow genotype were found in part because of a low frequency of one of the homozygous genotypes at this locus observed in the tested material. Zusammenfassung Kandidatengen-Marker fur Reproduktionsmerkmale in der polnischen Schweinelinie 990 Die Gene fur das Follikel-stimulierende Hormon (FSHB), Prolactin (PRL) und den Prolactinrezeptor (PRLR) wurden als Kandidatengene fur Reproduktionsmerkmale beim Schwein untersucht. Das Versuchsmaterial umfasste 444 Muttersauen der polnischen synthetischen Linie 990. Die folgenden Merkmale wurden in die Studie einbezogen: Gesamtzahl geborener Ferkel (TNB), Anzahl lebend-geborener Ferkel (NBA), Anzahl der Ferkel am 21. Tag (NP21), Anzahl der abgesetzten Ferkel (NWP), Wurfgewicht am 21. Lebenstag (LW21) und Wurfgewicht beim Absetzen (LWW). Basierend auf Analysen der Sauenleistung der zweiten und spateren Wurfe wurde herausgefunden, dass der Genotyp im PRL-Locus einen signifikanten Effekt (p≤0,01) auf TNB, NBA und NP21 hat. Der Effekt des PRLR-Genotyps war signifikant (p < 0,05) fur die Zahl lebend geborener Ferkel bei Sauen beim ersten Wurf. Aufgrund der im getesteten Material zum Teil geringen Haufigkeit von einem der homozygoten Genotypen am FSHB-Locus wurden keine signifikanten Effekte beobachtet.

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