Growth and carcass characteristics of Moroccan INRA180 lambs

摘要

Growthandcarcasscharacteristicswereevaluatedon82lambsofbothsexoftheINRA180breedfrom2007to2010.ThisMoroccannewsyntheticbreedwascreatedfromtheTimahditeandD#8217;manparentallocalbreedswhichcontributeeachwith50%ofgenes.Thedevelopmentandeweperformancesandlambpre-weaningtraitsoftheINRA180newbreedwerereportedinapreviouspaper.nbsp;Duringthefatteningperiodof45days,theINRA180lambshadaveragedailygain(ADG)of247g/dayandafeedconversionindexof5.00.Attheaveragedslaughteringageof170days,theINRA180lambsweighed30.8and15.92kgrespectivelyforslaughterandcarcassweightandshowedadressingpercentageof51.6%.Furthermore,theINRA180lambsdeposited603gand3.24mm,respectively,formesentericfatandbackfatthickness.Inaddition,theconformationscorewas3.43andlongissimusdorsimusclearea10.1cm2.nbsp;Theseresultsindicatedthattheinfusionof50%oftheprolificD#8217;mangenesintotheINRA180lambsdidnotaffectpost-weaninggrowthandcarcasstraits.INRA180promiseahighpotentialgeneticmeritinpurebredormaternalbreedinterminalcrossingforincreasingsheepflocksproductivityandforimprovingredmeatproductionintheagriculturalproductionsysteminMorocco.