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Heterosis u oplemenjivanju lucerke

dc.creatorMilić, Dragan
dc.creatorTaški-Ajduković, Ksenija
dc.creatorNagl, Nevena
dc.creatorKatanski, Snežana
dc.creatorKatić, Slobodan
dc.date.accessioned2021-04-26T19:05:05Z
dc.date.available2021-04-26T19:05:05Z
dc.date.issued2013
dc.identifier.issn1821-3944
dc.identifier.urihttp://fiver.ifvcns.rs/handle/123456789/1234
dc.description.abstractThe progress of alfalfa breeding has been slow, most notably due to its complex genetic structure (autotetraploidy) and tetrasomic inheritance. Alfalfa breeding programs are based on recurrent phenotypic selection with or without progeny testing. The genetic control of major agronomic traits is determined by both additive gene action (accumulation of frequency of desirable alleles represented by significant general combining ability (GCA) effects, and nonadditive gene action, complementary gene interactions represented by significant specific combining ability (SCA) effects. This type of gene action expression in alfalfa also determines the way in which breeding is carried out and brings about changes in the methods used. It has also given rise to the idea of the semi-hybrid breeding of this crop which involves breeding alfalfas within the population, identification of heterotic germplasm, and the seed production of semi or free hybrid seed. The studies of the relationship between the molecular variability of alfalfa populations and heterosis in their hybrids could contribute to a more precise selection of parental populations to be used for crossing in semi-hybrid alfalfa breeding procedure, aiming to reduce number of necessary crossings and therefore make future alfalfa breeding programs more efficient. Future tasks of alfalfa breeders should be to discover how to translate heterosis from single plants in hybrids planted in dense stand to generate 'yield for free' (capture heterosis) in alfalfa semi hybrids.en
dc.description.abstractNapredak u oplemenjivanju lucerke je spor najviše zbog njene složene genetičke strukture (autotetraploidna vrsta), kao i tetrasomičnog načina nasleđivanja. Aktuelni programi oplemenjivanja lucerke se oslanjaju na rekurentnu fenotipsku selekciju sa ili bez primene testova potomstava. Genetička kontrola važnih agronomskih osobina uslovljena je kako aditivnim delovanjem gena akumulacijom frekvencije poželjnih alela predstavljenim u značajnim efektima opštih kombinacionih sposobnosti (OKS) tako i neaditivnim delovanjem gena komplementarnim genskim interakcijama predstavljenim kroz značajne efekte posebnih kombinacionih sposobnosti (PKS). Ovakav način ispoljavanja genskih akcija kod lucerke uslovljava i način oplemenjivanja i promenu u metodama, pa se javlja ideja o semihibridnom oplemenjivanju lucerke. Ovaj koncept podrazumeva oplemenjivanje lucerke u okviru populacije, identifikaciju heterotične germplazme i proizvodnju semena. Istraživanja odnosa između molekularne varijabilnosti kod populacija lucerke i heterozisa kod hibrida nastalih ukrštanjem ovih populacija može doprineti preciznijoj i efikasnijoj selekciji roditeljskih populacija koje će biti korišćene u semihibridnom oplemenjivanju lucerke u cilju smanjivanja broja potrebnih ukrštanja čime se program oplemenjivanja čini značajno efikasnijim. Budući zadatak oplemenjivača lucerke je da se otkrije način iskorišćavanja heterozisa dobijenog na pojedinačnim biljkama i prenese na uslove useva u gustom sklopu i time omogući iskorišćavanje efekata heterozisa u vidu većih prinosa biomase u semihibridima lucerke.sr
dc.publisherInstitut za ratarstvo i povrtarstvo, Novi Sad
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/31024/RS//
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourceRatarstvo i povrtarstvo / Field and Vegetable Crops Research
dc.subjectalfalfaen
dc.subjectcrop yielden
dc.subjectheterosisen
dc.subjecthybridsen
dc.subjectplant breedingen
dc.subjectsemi-hybridsen
dc.subjectheterozissr
dc.subjecthibridisr
dc.subjectlucerkasr
dc.subjectoplemenjivanje biljakasr
dc.subjectprinos usevasr
dc.subjectsemihibridsr
dc.titleHeterosis in alfalfa breedingen
dc.titleHeterosis u oplemenjivanju lucerkesr
dc.typearticle
dc.rights.licenseBY
dc.citation.epage64
dc.citation.issue3
dc.citation.other50(3): 60-64
dc.citation.rankM51
dc.citation.spage60
dc.citation.volume50
dc.identifier.doi10.5937/ratpov50-5059
dc.identifier.fulltexthttp://fiver.ifvcns.rs/bitstream/id/180/1231.pdf
dc.identifier.rcubconv_1814
dc.type.versionpublishedVersion


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