Zbornik - Društvo genetičara Srbije

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150 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE IV-Pos-33 Subotica, 30. novembar - 4. decembar 2004. VARIJABILNOST I HERITABILNOST NEKIH OSOBINA GENOTIPOVA ENGLESKOG LJULJA (Lolium perenne L.) D. Sokoloviæ, Z. Lugiæ i J. Radoviæ Institut «SRBIJA», Centar za krmno bilje, Kruševac U ovom radu su predstavljena istraivanja pokazatelja varijabilnosti genotipova engleskog ljulja (komponenti varijansi i koeficijenata varijacije) i heritabilnosti za neke agronomski vrlo bitne osobine. Takoðe su predstavljene meðuzavisnosti najbitnijih osobina odabranih genotipova. Genotipovi engleskog ljulja koji potièu od divljih populacija su prouèavani u ogledu sa pojedinaènim biljkama i praæene su sledeæe osobine: vreme klasanja (izraeno brojem dana od 1. aprila), visina biljaka, širina bokora, broj izdanaka, prinos suve materije i sadraj sirovih proteina. Najveæa razlika izmeðu genetièkih i fenotipskih komponenti varijanse, odnosno najmanja heritabilnost u širem smislu je utvrðena za osobine visina biljaka (16,4%) i prinos suve materije (25,4%). Najveæu heritabilnost su pokazali genotipovi za vreme klasanja (83,26%) i širinu bokora (79,87%) tako da se oplemenjivanjem ovih osobina oèekuju vrlo brzi rezultati. Takoðe vrlo visoko nasleðivanje imaju osobine broj izdanaka i sadraj sirovih proteina. Uporeðenjem relativnih pokazatelja varijabilnosti utvrðeno je da se genotipovi najviše razlikuju po broju izdanaka i prinosu i da je kod broja izdanaka od ukupno 15% variranja èak za 80 % odgovoran genotip biljaka. Kod vremena klasanja èak 91% varijabilnosti potièe od genotipa, ali je ukupna varijabilnost relativno mala (3,44%). Najveæi koeficijenti korelacije utvrðeni su izmeðu širine bokora i visine biljke (0,86), odnosno visine biljke i sadraja sirovih proteina (-0,87). VARIABILITY AND HERITABILITY OF SOME TRAITS OF PERENNIAL RYEGRASS (Lolium perenne L.) GENOTYPES Investigations of variability parameters (variance components and coefficients of variation) and heritability of perennial ryegrass genotypes for agronomic most important traits are shown in this article. Interdependence of those traits is estimated, too. Perennial ryegrass genotypes originated from wild populations were investigated in space-plant design. Time of tillering, plant height, sward diameter, number of tillers per plant, dry matter yield and crude protein content were investigated. The highest differences between genetic and phenotypic variance components were determined for plant height and dry matter yield. Lowest heritability in broad sense is estimated for those traits (16,4% and 25,4%), respectively. Highest heritability is determined for time of tillering (83,26%) and sward diameter (79,87%). According those data, breeding of genotypes for improvement of those traits could provide effective results in short period. Also high heritability is detected for number of tillers per plant and crude protein content. It was determined in comparison of variability parameters that main difference between genotypes came from number of tillers per plant and dry matter yield. For number of tillers, genotype of plants is responsible for 80% of variations, from 15% of total variation. Also, 91% of variability for time of tillering originated from genotype, although total variability is relative low (3,44%). Highest coefficients of correlation were estimated between sward diameter and plant height (0,86), and between plant height and crude protein content (-0,87), respectively.
IV-Pos-34 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 151 Subotica, 30. novembar - 4. decembar 2004. VARIJABILNOST POKAZATELJA AKUMULACIJE I ISKORIŠÆAVANJA SUVE MATERIJE U BILJCI PŠENICE S. Stojkoviæ 1 , N. Deletiæ 1 , M. Biberdiæ 1 i Jovanka Stojanoviæ 2 1 Poljoprivredni fakultet Univerziteta u Prištini, Lešak 2 Institut za istraivanja u poljoprivredi «SRBIJA», Centar za strna ita, Kragujevac U ogledu sa 20 sorata ozime pšenice izuèavani su neki pokazatelji akumulacije i iskorišæavanja suve materije u biljci i njihov uticaj na prinos zrna. Utvrðeno je da vrednosti pokazatelja (biološki prinos, etveni indeks zrna, reutilizacija suve materije, broj zrna po klasu, masa 1000 zrna, visina biljaka i dr.) variraju u zavisnosti od genotipske specifiènosti kao i od uslova spoljne sredine. Prinos zrna nije zavisio samo od ukupne akumulacije suve materije u biljci tj. biološkog prinosa, veæ i od odnosa ove akumulacije u periodu do cvetanja i posle cvetanja. Na formiranje prinosa uticalo je više pokazatelja, redosled sorata po visini pojedinih pokazatelja se menjao. Najbolji prinosi su dobijeni u sorata kod kojih je veæi broj pokazatelja imao poveæane vrednosti. Od ispitivanih sorti najveæi proseèan prinos zrna ostvarila je sorta Tiha, a sorte koje su se još istakle po prinosu su: Grua, Nevesinjka i Toplica. VARIABILITY OF DRY SUBSTANCE ACCUMULATION AND UTILIZATION PARAMETERS OF WINTER WHEAT PLANT Some dry substance accumulation and utilization parameters of wheat plant and their influence on grain yield have been studied through a field trial with 20 winter wheat cultivars. The studied parameters value (biological yield, dry substance reutilization, number of grains per spike, 1000 grain mass, plant height, etc.) varried depending of genotypic specificity and environmental conditions. Grain yield was influenced not only by the total dry substance accumulation in plant (i.e. biological yield), but also by this accumulation amount before and after flowering. Yield forming was affected by many parameters, and cultivar range was different for various parameters. The best grain yield was observed in cultivars having elevated values of more than few parameters. The highest mean grain yield was observed in cultivar Tiha, and also high grain yield values were found in cultivars Gruza, Nevesinjka, and Toplica.
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DRUŠTVO GENETIČARA SRBIJE SERBIAN
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Uvodno predavanje Opening lecture
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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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