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Komponente genetičke varijabilnosti i heritabilnost broja redova zrna silažnog kukuruza

dc.creatorSečanski, Mile
dc.creatorŽivanović, Tomislav
dc.creatorTodorović, Goran
dc.date.accessioned2019-05-16T12:05:45Z
dc.date.available2019-05-16T12:05:45Z
dc.date.issued2005
dc.identifier.issn1450-9156
dc.identifier.urihttp://rik.mrizp.rs/handle/123456789/96
dc.description.abstractThe aim of this study was to estimate the following components for the number of rows per ear in silage maize: variability of inbred lines and their diallel hybrids, superior-parent heterosis and components of genetic variability and heritability on the basis of diallel hybrids. It was determined that the variability of this trait was significantly affected by a genotype, year and their interaction. Inbred lines ZPLB 402, ZPLB 403 and ZPLB 405 had a higher number of rows per ears than majority of hybrids in both years of investigation, which resulted in negative values of heterosis. The analysis of components of genetic variance indicates that the additive component (D) was higher that the dominant (Hi and H2) genetic variance while a positive value of the component F and frequency of dominant (u) and recessive (v) genes for the observed trait point out that dominant genes prevailed over recessive ones. Furthermore, this is confirmed by a dominant to recessive genes ratio in parental genotypes for the number of rows per ear (Kd/Kr>l) in both years. The evaluated average degree of dominance a/h^7d was below 1, indicating to a partial dominance in heritability of this trait in both years. Results of the Vr/Wr regression analysis point out to a partial dominance in heritability of the number of rows per ear. Moreover, a presence of non-allelic interaction was detected, which indicates to a need to study effects of epistasis as it can be more important in certain hybrids. The greater value of additive variance resulted in greater narrow-sense heritability for the number of rows per ear in both years of investigation (86.83% and 69.44%, respectively).en
dc.description.abstractCilj ovog istraživanja je bio da se za broj redova zrna silažnog kukuruza procene: (I) varijabilnost inbred linija i njihovih dialelnih hibrida, (II) heterozis u odnosu na boljeg roditelja i (III) komponente genetičke varijabilnosti i heritabilnosti na bazi dialelnog seta. Utvrđeno je da na varijabilnost ove osobine značajno utiču genotip, godina i njihova interakcija. Inbred linije ZPLB 402, ZPLB 403 i ZPLB 405 imale su veći broj redova zrna od većine hibrida u obe godine ispitivanja, što je rezultiralo kako niskim pozitivnim tako i negativnim vrednostima heterozisa. Analiza komponenti genetičke varijanse pokazuje da je aditvna komponente (D) bile veća od dominantne (H1 i H2) genetičke varijanse, a komponenta F koja je pozitivna i frekvencija dominantnih gena (u) i recesivnih gena (v) za ovu ispitivanu osobinu ukazuju da dominantni geni preovlađuju nad recesivnim. Takođe ovo potvrđuje i odnos dominantnih prema recesivnim genima kod roditeljskih genotipova za broj redova zrna (Kd/Kr>1) u obe godine ispitivanja. Izračunata vrednost prosečnog stepena dominacije koren iz H1/D je manja od jedinice, što pokazuje da se u nasleđivanju ove osobine radi o parcijalnoj dominaciji u obe godine ispitivanja. Rezultati Vr/Wr regresione analize ukazuju na parcijalnu dominaciju u nasleđivanju broja redova zrna. Takođe je ustanovljeno i prisustvo nealelne interakcije, što ukazuje na potrebu proučavanja efekta epistaze, jer može imati veći značaj kod pojedinih hibrida. Veća vrednost aditivne od dominantne varijanse uticala je da se dobije visoka heritabilnost u užem smislu za broj redova zrna u obe godine ispitivanja (86,83% i 69,44%).sr
dc.publisherInstitut za stočarstvo, Beograd
dc.rightsopenAccess
dc.sourceBiotechnology in Animal Husbandry
dc.subjectsilažni kukuruzsr
dc.subjectheterozissr
dc.subjectkomponente genetičke varijansesr
dc.subjectheritabilnostsr
dc.subjectregresiona analizasr
dc.titleComponents of genetic variability and heritability of the number of rows per ear in silage maizeen
dc.titleKomponente genetičke varijabilnosti i heritabilnost broja redova zrna silažnog kukuruzasr
dc.typearticle
dc.rights.licenseBY
dc.citation.volume21
dc.citation.issue1-2
dc.citation.spage109
dc.citation.epage121
dc.citation.other21(1-2): 109-121
dc.identifier.doi10.2298/BAH0502109S
dc.identifier.fulltexthttp://rik.mrizp.rs//bitstream/id/2713/94.pdf
dc.identifier.rcubconv_575
dc.type.versionpublishedVersion


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