Zbornik - Društvo genetičara Srbije

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152 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE IV-Pos-35 Subotica, 30. novembar - 4. decembar 2004. POJAVA POLUPATULJAKA U SUBSPONTANOM POTOMSTVU I IZGRADNJA KULTIVARA PATULJASTOG RASTA SEVERNOG AMERIÈKOG HRASTA Mirjana Šijaèiæ-Nikoliæ, A. Tucoviæ i Dragica Vilotiæ Šumarski fakultet, Beograd Uporodna morfo-fiziološka analiza više osobina obavljena je na generativnom potomstvu tri manje-više prostorno izolovana stabala na Adi Ciganliji. Kvantitativna svojstva su statistièki obreðena. Opravdanost razlika izmeðu srednjih vrednosti odreðivana je Studentovim t-testom. U radu je evidentirana i opisana pojava polupatuljaka u generativnom potomstvu tri, manje-više prostorno izolovana stabala na Adi Ciganliji. Transgresivno cepanje svojstava i izraena segregacija na dva alternativna fenotipa, prema rastu u analiziranom potomstvu, od 27 potomaka (25/2) proizilazi iz genetske divergentnosti roditeljskih stabala. Kako je problematika usmerenog, planskog oplemenjivanja na patuljast rast, samo zacrtana, ali nedovoljno razraðena, ovom pravcu oplemenjivanja treba obezbediti obim i kontinuitet. Da bi se ostvario bri napredak za potrebe urbanog šumarstva, trebalo bi više menjati gajenu vrstu. Jedan od takvih pravaca je sinteza patuljastih kultivara, ukrštanjima polupatuljaka u manje-više srodstvu, što obezbeðuje veæe moguænosti za racionalnije korišæenje urbanog prostora i u oplemenjivanju gradske sredine. Specifiènost rada zahteva: (1) definisanje eljenog tipa patuljastog kultivara, (2) izradu modela, kao i (3) planiranje genetièke prirode zamišljene sorte. Orijentacija na doslednu primenu ovih zahteva ima bitan uticaj na unapreðenje proizvodnje namenskih sadnica Quercus borealis Michx., pa joj treba pokloniti punu panju. THE OCCURRENCE OF SEMI-DWARFS IN SUB-SPONTANEOUS PROGENY AND THE DEVELOPMENT OF AMERICAN RED OAK CULTIVARS WITH DWARF GROWTH The comparative morpho-physiological analysis of several characters was performed on the generative progeny of three more or less spatially isolated trees on Ada Ciganlija. The quantitative results were statistically processed. The justification of differences between mean values was determined by Student t-test. This paper records and describes the occurrence of semi-dwarfs in the generative progeny of three more or less spatially isolated trees on Ada Ciganlija. The transgressive separation of characters and the expressed segregation into two alternative phenotypes of growth in the study progeny of 27 offsprings (25/2) results from the genetic divergence of parent trees. As the issues of directed, planned breeding on dwarf growth is only intended, but insufficiently developed, this direction of breeding should be more complete and continual. To achieve a faster progress for the demands of urban forestry, the cultivated species should be more changes. One of such directions is the synthesis of dwarf cultivars, by crossing of semi-dwarfs of more or less related trees, which ensures greater possibilities for the more rational use of urban space and the improvement of urban environment. The specific work requires to: (1) define the desired type of the dwarf cultivar, (2) develop the model, and (3) plan the genetic nature of the conceived variety. The orientation to the consistent application of the above has a significant effect on the improvement of production of specific purpose seedlings of Quercus borealis Michx., so it should be paid full attention to.
IV-Pos-36 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 153 Subotica, 30. novembar - 4. decembar 2004. KVALITET I PRODUKCIJA DOMAÆIH SORTI LUCERKE Z. Nešic 1 , Z. Tomiæ 1 , M. ujoviæ 1 , I. Ðaloviæ 2 1 Institut za stoèarstvo, Zemun-Beograd, 2 Agronomski fakultet, Èaèak Visoki prinosi krme, udeo i kvalitet proteina, duina ivota, prinos semena i druga agronomski vana svojstva svrstavaju lucerku u red nezamenljivih biljaka u proizvodnji kvalitetne voluminozne stoène hrane. Na oglednim poljima Instituta za stoèarstvo u periodu od 2002–2004. godine ispitivana su vanija agronomska svojstava (prinos zelene krme i sadraj suve materije) sedam genetièki divergentnih genotipova lucerke u poreðenju sa sortom NS–Medijana koja je korišæena kao standard. U drugoj i treæoj godini, ispitivanjem utvrðeni su i osnovni parametri kvaliteta standardnim labaratorijskim metodama (sadraj suve materije, sirovi proteini, sirove masti, sirova celuloza, mineralne materije, BEM). Komponente prinosa lucerke su u znaèajnim genetièkim korelacijama sa prinosom suve materije. Analizom kvaliteta, komponenti prinosa i sadraja suve materije nije utvrðena znaèajna genetska varijabilnost izmeðu ispitivanih sorti. Dobijeni rezultati pokazuju da sve prouèavane sorte nisu ispoljile statistièki znaèajne razlike, a po osnovnim parametrima kvaliteta i prinosa zelene mase i suve materije nalaze se na nivou standarda. QUALITY AND PRODUCTION OF DOMESTIC SORTS OF LUCERNE High yields of fodder, yield and quality of proteins, longevity, yield of seeds and other agronomically important properties make lucerne irreplaceable in the production of quality voluminous animal fodder. On the experimental fields of the Institute for Animal Husbandry in the period from 2002–2004 we have investigated more important agronomical traits (yield of green fodder and content of dry matter) of seven genetically divergent genotypes of lucerne in comparison with sort NS–Medijana which was used as standard. In the second and third year of investigation we have determined also the major quality parametres by standard lab methods (content of dry matter, crude protein, crude fat, crude fibre, mineral matters, BEM). The components of lucerne yield are in significant genetic correlations with the yield of dry matter. By the analysis of quality, components of yield and content of dry matter no significant genetic variability among investigated sorts was observed. The results obtained show that all investigated sorts expressed no statistically significant differences, while according to major parametres of quality and yield of green mass and dry matter they are at the standard level.
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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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Stanojeviæ B. 223 Stanojeviæ J. 2
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Zbornik - Društvo genetičara Srbije

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