期刊论文详细信息
Livestock research for rural development | |
Accumulated genetic analysis of piglets born alive and litter weights at birth in pigs from a commercial farm | |
G Martínez y O Verde1  R Galíndez1  | |
DOI : | |
学科分类:农业科学(综合) | |
来源: Centro para la Investigacion en Sistemas Sostenibles de Produccion Agropecuaria | |
【 摘 要 】
Inordertoestimatethevariancecomponents(VC)andthegeneticparameters(GP)forprolificacy,measuredascumulativenumberofpigletsbornalive(NPB)andtheaccumulatedlitterweightatbirth(LWB)ofLandraceandLargeWhitesowsfromacommercialfarm,3,419and3,142litterswereanalyzed,respectively.Theanimalswerekeptinintensiveproductionconditions,followingastricthealthandfoodcontrol,appliedbythesameenterprise.Reproductivemanagementincludedartificialinseminationoftheentirefemalepopulation.TheVCandGPwereestimatedusingMTDFREMLsetofprograms.Themodelincludedthefixeffectsofyearandmonthofbirthofthesowandthecovariateageatfirstfarrowing.Therandomeffectsincludedwerethedirectadditivegeneticandpermanentenvironmental.Genetic,environmentalandphenotypictrendswereestimatedbyregressionoftherespectivevaluesontheyearsofbirthofthesows.Averagevalueswere28.8piglets,45.1kgand31.8piglets,59.7kg,forNPB,LWB,forLandraceandLargeWhitesows,respectively.Thedirectheritabilityrangedbetween0.03and0.05,thepermanentenvironmentaleffectsrangedbetween0.13and0.15andrepeatabilitybetween0.17and0.18.Itisexpectedalowresponsetoselectionforthecharactersstudied,duetolowratesofdirectheritabilityfound.【 授权许可】
Unknown
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