Evaluation of parental dam birth weights associated with live weights and calving ease of female progeny of Indonesian-grade cattle

摘要

Recordsofdambirthweightsusedastheparentalgeneration(G0)andweightrecordsfrombirthtocalvingof308twoandhalf-year-oldheifersasthefirstgeneration(G1)accumulatedoverfiveyears(2011-2016)matedbyartificialinsemination(AI)wereusedtoevaluatedambirthweight(G0)associatedwithliveweightsandcalvingeaseoftheirfemaleprogeny(G1)ofIndonesian-gradecattle.Allheiferswererearedinprivateareasbelongingto153farmers.Dambirthweightswereclassifiedintohigh,mediumandlowbirthweights.Dams(G0)andheifers(G1)werefromtwoparentalOngolesiregroups(Krista,KrandTunggul,Tu)andwerematedbyAIusingstrawsofKrandTutoproducethefirstgeneration(G1)andsecondgeneration(G2),respectively.Thebreedingherdswereonrangepastureyeararound.FarmerssupervisedtheirheifersandtheanimalsshowingsignsofestruswerebroughttotheruralAIservicecenterofgovernmenttobematedbyAIusingthawedstrawoffrozengermplasmaofOngole-breedsires.Thedatawereanalyzedusingacovariancemodel.Lowbirthweightdams(G0)producedlighterfemaleprogeny(G1),atbirth,yearling,eighteen-monthandtwoandhalf-yearsold,comparedwiththosedeliveredbyhighbirthweightdams.Dambirthweights(G0)ofhigh,mediumandlowdidnotaffectcalvingdifficulty(dystocia)amongthefemaleprogeny(G1).Lowbirthweightdams(G0)producedlightergrandprogeny(G2)atbirthandat18-montholdcomparedwiththosegeneratedbyhighbirthweightdams(G0).Furthermore,dambirthweightdidnotaffectgrandprogeny#8217;sweaningandyearlingliveweights.