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Modifikacija zrna i sadržaj triptofana u segregirajućim generacijama kukuruza visokog kvaliteta proteina

dc.creatorIgnjatović-Micić, Dragana
dc.creatorStanković, Goran
dc.creatorMarković, Ksenija
dc.creatorMladenović Drinić, Snežana
dc.creatorLazić-Jančić, Vesna
dc.creatorDenić, Miloje
dc.date.accessioned2019-05-16T12:11:17Z
dc.date.available2019-05-16T12:11:17Z
dc.date.issued2010
dc.identifier.issn0534-0012
dc.identifier.urihttp://rik.mrizp.rs/handle/123456789/303
dc.description.abstractMaize has poor nutritional value due to deficiency of two essential amino acids - tryptophan and lysine. Although recessive opaque2 (o2) mutation significantly increases their content in the endosperm, incorporation of opaque2 into high yielding cultivars was not commercially successful, because of its numerous agronomic and processing problems due to soft endosperm. Quality protein maize - QPM has lately been introduced as opaque2 maize with improved endosperm hardness and improved agronomic traits, but mostly within tropical and subtropical germplasm. The ongoing breeding project at MRI includes improvement of MRI opaque2 lines and conversion of standard lines to QPM germplasm. The main selection steps in QPM breeding involve assessing kernel modifications and tryptophan level in each generation. Herein, we present the results of the analysis for these traits on F3 and BC1F1 generations of QPM x opaque2, opaque2 x QPM and standard lines x QPM crosses. The results showed that the majority the genotypes had kernel types 2 and 3 (good modifications). The whole grain tryptophan content in F3 and BC1F1 genotypes of crosses between QPM and opaque2 germplasm was at the quality protein level, with a few exceptions. All BC1F1 genotypes of standard lines x QPM had tryptophan content in the range of normal maize, while majority of F3 genotypes had tryptophan content at level of QPM. The progeny (with increased tryptophan levels) of QPM and opaque2 crosses had significantly higher tryptophan content compared to the progeny of crosses between standard and QPM lines - 0.098 to 0.114 and 0.080, respectively. All genotypes that had poorly modified kernels and/or low tryptophan content will be discarded from further breeding.en
dc.description.abstractIako recesivna opaque2 (o2) mutacija značajno povećava sadržaj lizina i triptofana u zrnu kukuruza, inkorporacija opaque2 u visoko prinosne genotipove nije uspela, zbog brojnih problema koji su se javili kao posledica mekog endosperma. Kukuruz visokog kvaliteta proteina (QPM) je opaque2 kukuruz sa poboljšanom tvrdoćom zrna i dobrim agronomskim performansama, stvoren prvenstveno od tropske i subtropske germplazme. U Institutu za kukuruz je u toku projekat koji za cilj ima poboljšanje sopstvenih opaque2 linija i prevođenje standardnih linija u QPM kukuruz. U ovom radu predstavljamo rezultate analiza modifikacije zrna i sadržaja triptofana u F3 i BC1F1 generacijama ukrštanja QPM x opaque2, opaque2 x QPM i standardne linije x QPM. Većina genotipova je imala zrno tipa 2 i tipa3 (dobre modifikacije). Sadržaj triptofana u celom zrnu genotipova ukrštanja QPM i opaque2 linija je bio na nivou karakterističnom za QPM, sa nekoliko izuzetaka. Sadržaj triptofana u potomstvu ukrštanja standardne linije x QPM je bio povećan kod većine F3 genotipova. Potomstvo (sa povećanim sadržajem triptofana) ukrštanja QPM i opaque2 linija je imalo znatno veći sadržaj ove aminokiseline u odnosu na potostvo ukrštanja standardne linije x QPM - - od 0.098 do 0.114 prema 0.080. Genotipovi sa lošim modifikacija zrna i/ili niskim sadržajem triptofana ce biti eleminisani iz daljeg procesa selekcije.sr
dc.publisherDruštvo genetičara Srbije, Beograd
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/20039/RS//
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceGenetika
dc.subjectkernel modificationsen
dc.subjectmaizeen
dc.subjectopaque2en
dc.subjectQPMen
dc.subjecttryptophan contenten
dc.titleKernel modifications and tryptophan content in QPM segregating generationsen
dc.titleModifikacija zrna i sadržaj triptofana u segregirajućim generacijama kukuruza visokog kvaliteta proteinasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.volume42
dc.citation.issue2
dc.citation.spage267
dc.citation.epage277
dc.citation.other42(2): 267-277
dc.citation.rankM24
dc.identifier.wos000281826000006
dc.identifier.doi10.2298/GENSR1002267M
dc.identifier.scopus2-s2.0-79957614471
dc.identifier.fulltexthttp://rik.mrizp.rs//bitstream/id/2235/301.pdf
dc.type.versionpublishedVersion


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