Zbornik - Društvo genetičara Srbije

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124 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE IV-Pos-7 Subotica, 30. novembar - 4. decembar 2004. NASLEÐIVANJE VISINE STABLJIKE I DUINE KLASA KOD PŠENICE Biljana Gorjanoviæ i Marija Kraljeviæ-Balaliæ Poljoprivredni fakultet, Novi Sad Izbor roditelja za ukrštanje je veoma vaan zadatak u programima oplemenjivanja biljaka. Analiza kombinacionih sposobnosti je jedan od metoda koji se koriste za odreðivanje roditelja koji æe u ukrštanju sa drugim roditeljima dati superiorno potomstvo. Koristeæi linija x tester analizu (Singh i Choudhary, 1979) prouèavane su kombinacione sposobnosti, efekti gena i naèin nasleðivanja visine stabljike i duine klasa, koristeæi pet majki, tri testera i 15 F1 hibrida pšenice. Analiza komponenti genetièke varijanse kao i odnos OKS/PKS ukazuju da su u nasleðivanju visine stabljike u prvoj godini i duine klasa u drugoj godini najveæi znaèaj imali aditivni geni. Neaditivni geni su preovlaðivali u nasleðivanju visine stabljike u drugoj godini i duine klasa u prvoj godini ispitivanja. Naèin nasleðivanja ispitivanih svojstava zavisio je od kombinacije ukrštanja i godine ispitivanja. U veæini sluèajeva nasleðivanje je bilo dominantno. Analizom opštih kombinacionih sposobnosti (OKS) moe se zakljuèiti da je najbolji opšti kombinator za visinu stabljike u prvoj godini bila linija NS 31/96, dok je u drugoj godini najbolji kombinator bila sorta Fundulea 490. Za duinu klasa najbolji opšti kombinator u obe godine ispitivanja bila je linija NS 31/96. U veæini sluèajeva hibridi sa najboljim posebnim kombinacionim sposobnostima (PKS) nastajali su ukrštanjem jednog dobrog i jednog lošeg opšteg kombinatora. Linija NS 31/96 je generalno bila najbolji opšti kombinator zbog èega se preporuèuje za korišæenje u programima oplemenjivanja pšenice. INHERITANCE OF PLANT HEIGHT AND SPIKE LENGHT IN WHEAT The choice of parents is a very important task in a breeding program. Combining ability studies are used by plant breeders to select parents with maximum potential of transmitting desirable genes to the progenies. Using the line x tester analysis (Sing and Choudhary,1979), we studied the combining ability, gene effects and mode of inheritance of plant height and spike length, using 5 females, 3 testers and 15 F1 hybrids of wheat. Estimation of the genetic components of variation as well as ratio of GCA/SCA showed that plant height in the first year and spike length in the second year of research were predominantly controlled by additive gene action. Non-additive gene effects have been found to be more important than additive ones in the inheritance of plant height in the second year and spike length in the first year of research. The mode of inheritance of characters under study depended on the cross combination and the year of growing. In most cases the mode of inheritance was dominant. The estimates of general combining ability (GCA) pointed out that the best general combiner for the plant height in the first year was NS 31/96, while in the second year the best combiner was Fundulea 490. For the spike length the best general combiner in the both years was NS 31/96. In majority of the cases good specific combining ability (SCA) were usually associated with crosses of two genetically divergent parents having at least one parent as a good general combiner. The line NS 31/96 was the best general combiner in this research and it can be used in wheat breeding.
IV-Pos-8 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 125 Subotica, 30. novembar - 4. decembar 2004. OCENA POGODNOSTI MONOGERMNIH LINIJA ŠEÆERNE REPE ZA STVARANJE HIBRIDA TOLERANTNIH PREMA RIZOMANIJI N. Èaèiæ, L. Kovaèev, Sneana Mezei i Nevena Nagl Nauèni institut za ratarstvo i povrtarstvo, Novi Sad Prvi podaci o prisustvu rizomanije u našoj zemlji datiraju iz 1971. godine i od tog vremena ovo obolenje se raširilo na èitavo proizvodno podruèje šeæerne repe. Kao posledica širenja ovog, veoma destruktivnog, obolenja u proizvodnju su se uvodile sorte šeæerne repe tolerantne prema rizomanija, a u poslednje dve godine gaje se skoro stoprocentno tolerantne sorte. Imajuæi ovu èinjenicu u vidu 2002. godine izvršili smo ukrštanje 250 monogemnih cms linija, koje ne poseduju gene tolerantnosti prema rizomaniji, sa multigermnom diplidnom populacijom koja poseduje rizor gen tolerantnosti prema ovom obolenju. Tokom 2003. godine na zemljištu zaraenom rizomanijom, izvršena je provera proizvodnih svojstava dobijenih hibridnih kombinacija. Za ispitivanja u 2004. godini odabrano je 40 hibridnih kombinacija stavljajuæi pri tome naglasak na sadraj šeæera i tehnološke karakteristike. U monogermne linije koje pokau dobre kombinacione sposobnosti za najvanija proizvodna svojstva uneæe se holly odnosno wb gen otpornosti, a potom æe se ove linije koristiti za stvaranje hibrida šeæerne repe visoko tolerantnih prema rizomaniji i dobrih proizvodnih svojstava. EVALUATION OF SUITABILITY OF MONOGERM SUGAR BEET LINES FOR THE DEVELOPMENT OF HYBRIDS TOLERANT TO RHIZOMANIA The first reports of rhizomania in our country date back to 1971. Since then, the disease has spread to all sugar beet-growing areas of the country. In response to the spread of this highly destructive disease, sugar beet cultivars tolerant of rhizomania were introduced increasingly into commercial production, and in the last two years virtually all sugar beet cultivars grown commercially have tolerance to rhizomania. With this in mind, in 2002 we crossed 250 monogerm cms lines that have no genes for tolerance to rhizomania with a multigerm diploid population that has the Rizor gene for tolerance to this disease. During 2003, hybrid combinations obtained in this manner were evaluated for their production characteristics on rhizomania- infected soil. Forty of the combinations were then chosen for testing in 2004, with emphasis on sugar content and technological characteristics. Monogerm lines with good combining abilities for the most important production characteristics will be identified and the Holly and WB genes for rhizomania resistance will be incorporated into them. These lines will then be used to develop sugar beet hybrids that have high tolerance towards rhizomania and good production characteristics.
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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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Kovaèev L. 73, 90, 125, 140, 147 K
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Zbornik - Društvo genetičara Srbije

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