Zbornik - Društvo genetičara Srbije

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162 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE IV-Pos-45 Subotica, 30. novembar - 4. decembar 2004. MEÐUZAVISNOST KOMPONENTI VISINE U GERMPLAZMI SIRKA METLAŠA [Sorghum bicolor (L). Moench] V. Sikora Nauèni institut za ratarstvo i povrtarstvo, Novi Sad U radu je izvršeno ispitivanje mepuzavisnosti komponenti visine (visina biljke, visina stabla, duina metlice, duina peteljki, duina drške metlice, duina rukavca lista zastavièara i eksponiranost metlice) u germplazmi sirka metlaša. Dvogodišnji ogled se sastojao od kolekcije koja broji 450 genotipova. S obzirom na njeno poreklo i obim moe se tvrditi da se radi o svetskoj kolekciji sirka metlaša, koja obuhvata lokalne autohtone populacije, priznate i perspektivne sorte razlièitog porekla, kao i materijal proizišao iz programa oplemenjivanja. Od svih komponenti visine pozitivne, visoko signifikantne genetièke korelacije su zabeleene izmepu visine biljke i visine stabla (rg=0,986**) i duine drške i eksponiranosti metlice (rg=0,910**). Vrednosti koeficijenata fenotipske korelacije takope ukazuju na to da visina biljke u najveæoj meri zavisi od visine stabla (rf=0,984**), odnosno eksponiranost metlice od duine drške (rf=0,887**). Znaèajne korelacije su još zabeleene izmepu duine drške i visine biljke (rg=0,702*; rf=0,646*), duine drške i visine stabla (rg=0,693*; rf=0,614*) i duine peteljki i duine metlice (rg=0,673*; rf=0,677*). Duina peteljki je osobina koja je u negativnoj korelaciji sa visinom biljke, visinom stabla, duinom drške i eksponiranošæu. Pored toga, u negativnoj korelaciji su još i eksponiranost metlice i duina rukavca. Pošto se u praksi metlice sirka metlaša skidaju ruèno, koncepcija selekcije se uglavnom bazira na stvaranju niskih sorti sa eksponiranom metlicom. INTERRELATIONSHIP COMPONENTS OF HEIGHT IN BROOMCORN [Sorghum bicolor (L.) Moench] GERMPLASM The examination of interrelationship component of height (plant height, stalk height, lenght of panicle, fiber lenght, lenght of peduncle, flag leaf sheat lenght and panicle exseretion) in broomcorn germplasm was carried out. Two years experiment include collection of 450 broomcorn genotypes. Consider on its origin and volume it represent world broomcorn collection, which include local populations, grown and perspective varieties from different origin, as well as selection material. High significant positive genetic correlation was record between plant height and stalk height (rg=0,986**) as well as lenght of peduncle and plant exsertion (rg=0,910**). Coefficients of phenotypic correlation also shows that plant height is mostly depend on stalk height (rf=0,984**) and panicle exsertion on lenght of peduncle (rf=0,887**). Significant correlation was record between lenght of peduncle and plant height (rg=0,702*, rf=0,646*), lenght of peduncle and stalk height (rg=0,693*, rf=0,614*) and fiber lenght and lenght of panicle (rg=0,673*, rf=0,677*). Fiber lenght is characteristic which is in negative correlation with plant height, stalk height, peduncle lenght and panicle exsertion. Negative correlation was also record between panicle exsertion and flag leaf sheat lenght. In praxis broomcorn panicle is harvested manualy, so the concept of selection is based on low hights varieties with exsertion panicle.
IV-Pos-46 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 163 Subotica, 30. novembar - 4. decembar 2004. GENI VIRULENTNOSTI I AVIRULENTNOSTI U POPULACIJI PARAZITA Puccinia coronata avenae Mirjana Staletiæ, S. Stojanoviæ i M. Milovanoviæ Institut za istraivanja u poljoprivredi «SRBIJA», Centar za strna ita, Kragujevac Ispitivanja su obavljena u 1999. i 2000. godini u Centru za strna ita u Kragujevcu. Uzorci uredospora su prikupljeni sa razlièitih sorti ovsa u 23 lokaliteta na podruèju <strong>Srbije</strong>. U laboratoriji su dobijene èiste kulture, kojima je inokulisan set izogenih linija sa Pc genima: Pc38, Pc39, Pc48, Pc50, Pc50-2, Pc54-1, Pc54-2, Pc55, Pc56, Pc58, Pc59, Pc60, Pc61, Pc62, Pc63, Pc64, Pc67 i Pc68. Geni virulentnosti P. coronata avenae su identifikovani na osnovama uzajamnih odnosa gena po teoriji «gen za gen» (Flor, 1955). Utvrðeno je postojanje 23 razlièite formule virulentnosti. Broj gena virulentnosti u identifikovanim patotipovima se kretao od 2 do 12. Najvirulentniji je bio patotip sa genima virulentnosti V48, V50, V50-2, V55, V56, V58, V59, V60, V61, V62, V64 i V67, dok je sa dva gena virulentnosti (V63+V68) bio samo jedan patotip. Najveæi broj patotipova imao je 5, 6, 7i8gena virulentnosti, dok je ukupan odnos virulentnih prema avirulentnim genima odgovarao teoretskom odnosu 1:2. Najveæu frekvenciju su imali geni virulentnosti V54-2, V64, V67, V61, V50-2, V62, V60 i V50, a najmanju V63, V58, V54-1, V59, V38, V48, V55, V56, V39 i V68. Dobijeni rezultati pokazuju da je genetièka varijabilnost virulentnosti P. coronata avenae u Srbiji u 1999. i 2000. godini bila visoka, što upuæuje na neophodnost iznalaenja novih donora Pc gena otpornosti radi njihovog korišæenja u oplemenjivanju ovsa na otpornost prema ovom patogenu. THE VIRULENCE AND A VIRULENCE GENES IN POPULATION OF PARASITE Puccinia coronata avenae Investigations were performed during 1999. and 2000. years in Center for small grains in Kragujevac. The samples of uredo-spores were collected from different oats cultivars in 23 locations of Serbia. In laboratory were obtained pure cultures, and by them was inoculated the set of isogenic lines with Pc genes: Pc38, Pc39, Pc48, Pc50, Pc50-2, Pc54-1, Pc54-2, Pc55, Pc56, Pc58, Pc59, Pc60, Pc61, Pc62, Pc63, Pc64, Pc67, and Pc68. The virulence genes of P. coronata avenae were identified on the basis of mutual relations of genes according to theory «gene for gene». The existence of 23 different formulas of virulence was established. The number of virulence genes in identified patho-types was 2 to 12. The most virulent was patho-type with genes of virulence V48, V50, V50-2, V55, V56, V58, V59, V60, V61, V62, V64, and V67, until with two virulence genes (V63+V68) was only one patho-type. The greatest number of patho-types had 5,6,7 and 8 virulence genes, until the total relation of virulent to a virulent genes was in accordance with theoretic relation 1:2. The most frequent were virulence genes V54-2, V64, V67, V61, V50-2, V62, V60, and V50, and the least frequent were V63, V58, V54-1, V59, V38, V48, V55, V56, V39 and V68. Obtained results point out that in 1999. and 2000. seasons, the genetic variability of virulence of P. coronata avenae in Serbia was high, which demonstrates on necessity of search of new donors of Pc genes of resistance for theirs future usage in oat breeding for resistance to this pathogen.
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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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ZAVRŠNO PREDAVANJE CLOSING LECTURE
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A Aksentijeviæ I. 194 Aleksiæ J.
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Zbornik - Društvo genetičara Srbije

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