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Detection on OAR7 of QTL affecting fat and protein yields in dairy sheep

Casu, Sara and Colombino, Maria and Mulas, Giuliana and Sechi, Stefania and Barillet, Françis and Carta, Antonello (2009) Detection on OAR7 of QTL affecting fat and protein yields in dairy sheep. Italian Journal of Animal Science, Vol. 8 (Suppl. 2), p. 45-47. eISSN 1828-051X. Article.

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DOI: 10.4081/ijas.2009.s2.45

Abstract

The objective of this paper was identifying QTL that affect fat and protein yields in dairy sheep independently of milk yield. Data were collected in an experimental flock of 887 ewes organized in a daughter design. QTL detection focused on OAR7 where 13 microsatellites were available. The genetic abilities to produce fat and protein independently from the ability to produce milk were estimated as the residuals of the regression of EBV for fat and protein yields on EBV for milk yield. One QTL affecting fat yield (CWP=0.00009) and one QTL affecting protein yield (CWP=0.006) were detected. The most probable QTL location was 115.3 cM in the Sheep Best Position Linkage Map Version 4.7 for both traits. No QTL affecting milk yield was detected. The analysis of fat and protein yields independently of milk yield is an effective strategy to identify chromosomal regions affecting milk composition with no detrimental effect on milk yield.

Item Type:Article
ID Code:5723
Status:Published
Refereed:Yes
Uncontrolled Keywords:QTL, fat yield, protein yield
Subjects:Area 05 - Scienze biologiche > BIO/13 Biologia applicata
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
002 Altri enti e centri di ricerca del Nord Sardegna > AGRIS Sardegna, Olmedo > Dipartimento per la ricerca nelle produzioni animali > Settore genetica e biotecnologie
Publisher:Avenue media on behalf of Scientific Association of Animal Production (ASPA)
eISSN:1828-051X
Publisher Policy:Depositato per gentile concessione dell'ASPA
Additional Information:Relazione presentata al 18. Congresso nazionale ASPA, Palermo, 9-12 giugno 2009.
Deposited On:15 Mar 2011 09:31

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