Zbornik - Društvo genetičara Srbije

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102 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE IV-Usm-13 Subotica, 30. novembar - 4. decembar 2004. REKURENTNA SELEKCIJA NA POVEÆAN SADRAJ ULJA KOD KUKURUZA G. Saratliæ 1 , Violeta Anðelkoviæ 1 , Nada Leèiæ 2 , M. Babiæ 1 , N. Deliæ 1 , G. Stankoviæ 1 i K. Lemkey 3 1 Institut za kukuruz «Zemun Polje», Beograd 2 Nauèni institut za ratarstvo i povrtarstvo, Novi Sad 3 USDA-ARS, Poljoprivredni fakultet, Ajova, SAD Rekurentna selekcija na poveæan sadraj ulja primenjena je tokom sedam ciklusa fenotipske masovne selekcije kod dve sintetièke populacije kukuruza. Izuèavani su direktan i indirektan odgovor na selekciju, kao i korelativne promene sadraja ulja i drugih agronomskih svojstava, koje æe biti prikazane u ovom radu. Sadraj ulja u zrnu odreðen je NMR spektroskopijom. Poveæan sadraj ulja bio je u negativnoj korelaciji sa prinosom zrna u populaciji DS7u per se, dok je u populaciji YUSSSu per se, sa poveæanjem sadraja ulja došlo i do poveæanja prinosa zrna. Slièan trend zabeleen je i kod meðuzavisnosti sadraja ulja u zrnu i visine biljke, dok je procenat poleglih biljaka bio u signifikanto negativnoj korelaciji sa sadrajem ulja u zrnu kod populacije YUSSSu, dok je meðuzavisnost ovih svojstava bila nesignifikantna unutar populacije DS7u. Prema ovim i drugim do sada objavljenim rezultatima, moe se zakljuèiti da prilikom selekcije na poveæan sadraj ulja obavezno treba uzeti u obzir korelativne promene prinosa zrna i drugih znaèajnih svojstava. RECURRENT SELECTION FOR INCREASED OIL CONTENT IN MAIZE Recurrent selection for increased oil content was conducted on maize populations over seven cycles of phenotypic mass selection. The objectives were to evaluate direct and indirect responses to selection and correlative changes between oil content and other agronomic traits. Oil content in individual kernels was determinated by nuclear magnetic resonance spectroscopy. The increased oil content was associated with grain yield reduction inDS7u per se while grain yield increased significantly in YUSSSu per se. Similar trend was detected in correlation between oil content and plant height; percentage of lodgged plants has significant and negative correlation with oil content in YUSSSu, while correlation among these traits was not significant in DS7u. Due to our and previous results, it could be reccomanded that selection for increased oil content in the populations should consider correlative changes in grain yield and other important traits.
IV-Usm-14 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 103 Subotica, 30. novembar - 4. decembar 2004. EFEKAT HETEROZISA ZA PRINOS SEMENA I KOMPONENTE PRINOSA SUNCOKRETA Nada Hladni 1 , D. Škoriæ 1 , Marija Kraljeviæ-Balaliæ 2 1 Nauèni institut za ratarstvo i povrtarstvo, Novi Sad 2 Poljoprivredni fakultet, Novi Sad Stvaranje novih visoko prinosnih i stabilnih hibrida suncokreta na bazi interspecies hibridizacije zahteva posedovanje informacije o efektu heterozisa za agronomski vana svojstva u F1 generaciji. Efekat heterozisa za prinos semena, visinu biljke i preènik glave prouèavan je kod interspecies hibrida stvorenih metodom linija x tester. Inbred linije majke nastale su interspecies hibridizacijom, a restorer inbred linije oca dobrih kombinacionih sposobnosti korišæene su kao testeri u formi restauratora fertilnosti. Hibridi F1 generacije nastali su ukrštanjem svakog testera sa svakom inbred linijom majke. Izmeðu inbred linija i njihovih hibrida postoje znaèajne razlike u srednjim vrednostima za ispitivana svojstva. Vrednosti heterozisa za prinos semena po biljci bile su pozitivne i visoko znaèajne u odnosu na roditeljski prosek (98.4-274.13%) kao i u odnosu na boljeg roditelja (54.8-223.2%). Znatno nii efekat heterozisa ustanovljen je za visinu biljke (19.0-66.0%) u odnosu na roditeljski prosek i u odnosu na boljeg roditelja (-3.9-51.6%). Kod preènika glave heterozis se kretao od 19.0 do 55.6% u odnosu na roditeljski prosek i od 7.8 do 36.6% u odnosu na boljeg roditelja. Ova istraivanja mogu biti od znaèaja za stvaranje novih visokoprinosnih genotipova suncokreta na bazi interspecies hibridizacije. HETEROSIS FOR SEED YIELD AND YIELD COMPONENTS IN SUNFLOWER The development of new high-yielding and stable sunflower hybrids based on interspecific hybridization requires information on the heterotic effects for agronomically important traits in the F1 generation. Heterotic effects for seed yield, plant height and head diameter were studied in interspecific sunflower hybrids developed by the line x tester method. The female inbred lines were developed by interspecific hybridization, while the male restorer inbreds with good combining abilities were used as testers in the form of fertility restorers. F1 hybrids were obtained by crossing each tester with each female inbred. The inbred lines and their F1 hybrids differed significantly in their mean values of the traits under study. Heterosis values for seed yield per plant were positive and highly significant relative to both the parental mean (98.4-274.1%) and the better parent (54.8-223.2%). Significantly less heterosis was recorded in the case of plant height relative to parental mean (19.0-66.0%) and better parent (-3.9-51.6%). With head diameter, the heterotic effect ranged from 19.0 to 55.6% (parental mean) and from 7.8 to 36.6% (better parent). The results of this study may be used for the development of new high-yielding and stable sunflower hybrids based on interspecific hybridization.
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DRUŠTVO GENETIČARA SRBIJE SERBIAN
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III KONGRES GENETIÈARA SRBIJE Subo
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Uvodno predavanje Opening lecture
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I tematska oblast / I topic: Geneti
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12 ZBORNIK ABSTRAKATA III KONGRESA
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ZAVRŠNO PREDAVANJE CLOSING LECTURE
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A Aksentijeviæ I. 194 Aleksiæ J.
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Kovaèev L. 73, 90, 125, 140, 147 K
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Stanojeviæ B. 223 Stanojeviæ J. 2
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Zbornik - Društvo genetičara Srbije

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