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dc.creatorLukić, Miloš
dc.creatorPetričević, Veselin
dc.creatorŠkrbić, Zdenka
dc.creatorDelić, Nikola
dc.creatorTolimir, Nataša
dc.creatorDosković, Vladimir
dc.creatorRakonjac, Simeon
dc.date.accessioned2020-12-29T08:24:21Z
dc.date.available2020-12-29T08:24:21Z
dc.date.issued2020
dc.identifier.issn1450-9156
dc.identifier.urihttp://r.istocar.bg.ac.rs/handle/123456789/722
dc.description.abstractA comparative study of production traits was performed between COBB 500 broilers from a 52-week-old breeder flock and a ROSS 308 from two breeder flocks of different ages (52 weeks and molted flock 79-week-old) in equal, relatively suboptimal ambiental (temperature oscillations) and nutritional conditions (market feed of average quality). The experiment was performed on a total of 720 day-old chicks of both sexes in 4 experimental groups (Cobb; Ross 52; Ross 79; Ross mix - a mixture of Ross broilers from two breeder ages), with 6 replications per group and 30 chickens in each replication. Mortality, body weight (days 0, 7, 21 and 42), weight gain, feed conversion and production index (EPEF) were monitored in 42 days of fattening. It was determined that heavier day-old chickens (p<0.01) with better gain in the first week of production, were obtained from the older breeder flock. Except in the first week, Cobb generally had the highest (p<0.05) body weights and gains in the experiment, aside from in mid and the end of the test, where did not differ significantly from the body weight of the Ross 79 and Ross mix group of broilers, respectively. Results also indicate that genetics (used hybrid) may have a greater influence on the final body weight and daily gain in suboptimal test conditions than the breeder age. Cobb 500 broilers also had significantly higher mortality under test conditions (p<0.05). Feed conversion and the achieved EPEF production index did not vary significantly in the test in chickens of different genotypes or parents. In general, suboptimal conditions in our research constrained realisation of the genetic production potential, with a suppressive effect on both hybrids, higher on the growth in Ross 308, and on the resistance measured by mortality in Cobb 500 hybrids.sr
dc.language.isoensr
dc.publisherInstitute for Animal Husbandry, Belgradesr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200022/RS//sr
dc.relation"info:eu-repo/grantAgreement/MESTD/inst-2020/200088/RS//"sr
dc.relation"info:eu-repo/grantAgreement/MESTD/inst-2020/200045/RS//"sr
dc.rightsopenAccesssr
dc.sourceBiotechnology in Animal Husbandrysr
dc.subjectbroiler strainsr
dc.subjectbreeder agesr
dc.subjectsuboptimal conditionssr
dc.subjectproductionsr
dc.titleGENOTYPE AND BREEDER FLOCK AGE IMPACT ON BROILER PERFORMANCE IN SUBOPTIMAL CONDITIONSsr
dc.typearticlesr
dc.rights.licenseBYsr
dcterms.abstractЛукић, Милош; Ракоњац, Симеон; Досковић, Владимир; Толимир, Наташа; Делић, Никола; Шкрбић, Зденка; Петричевић, Веселин;
dc.citation.volume36
dc.citation.issue4
dc.citation.spage447
dc.citation.epage462
dc.citation.rankM24~
dc.identifier.doi10.2298/BAH2004447L
dc.identifier.fulltexthttp://r.istocar.bg.ac.rs/bitstream/id/3852/bitstream_3852.pdf
dc.type.versionpublishedVersionsr


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