Zbornik - Društvo genetičara Srbije

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36 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE I-Pos-15 Subotica, 30. novembar - 4. decembar 2004. VARIJABILNOST OSOBINA CVASTI I LISTA I NASLEÐIVANJE OBLIKA LISKE SUNCOKRETA U F1 GENERACIJI S. Terziæ i Jovanka Atlagiæ Institut za ratarstvo i povrtarstvo, Novi Sad Zbog izraene varijabilnosti divlje vrste su korišæene za ukrštanja sa cms linijama gajenog suncokreta. Varijabilnost je utvrðena merenjem preènika cvasti, broja jezièastih cvetova, duine i širine liske. Podaci su obraðeni putem hijerarhijske klaster analize u programu SYSTAT 10 i dobijen je dendrogram na osnovu koga je tumaèena divergentnost ispitivanih populacija. Naèin nasleðivanja je utvrðivan poreðenjem 25 hibridnih kombinacija sa roditeljima. Klaster analizom su razdvojene tri grupe biljaka. Prvu èine inbred linije gajenog suncokreta. U srednjem delu dendrograma su jednogodišnje divlje vrste i treæa grupa su višegodišnje divlje vrste. Razlike u srednjim vrednostima ispitivanih svojstava izmeðu roditelja su bile znaèajne. Najèešæi je bio intermedijerni tip nasleðivanja zatim parcijalno dominantni i dominantni a u dve hibridne kombinacije manifestovao se negativni heterozis. INFLORESCENCE AND LEAF TRAITS VARIABILITY AND INHERITANCE OF LEAF SHAPE IN F1 GENERATION OF SUNFLOWER Populations of wild sunflower species were crossed with cms cultivated lines because of their high variability. Variability was determined by measuring inflorescence diametar, ray flower number and the leaf length and width. The data was used for hierarchical cluster analysis in the SYSTAT 10 program and the obtained dendrogram was used to interpret divergence of used populations. The modes of inheritance were tested by comparing 25 hybrid populations with parents. Cluster analysis divided plants in to three groups. The first one were inbred lines of cultivated sunflower. In the middle of the cluster tree were annual wild species and the third group were perennial wild species. The mean value differences in observed traits between parents were significant. All modes of inheritance were present in F1 generation. Most of the hybrid combinations in F1 were intermediate followed by equal number of partially dominant and dominant ones and in two hybrid combinations negative heterotic effect was scored.
I-Pos-16 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 37 Subotica, 30. novembar - 4. decembar 2004. RAZVOJNA STABILNOST KOD INTERSPECIJSKIH HIBRIDA Drosophila I. Tomišiæ-Kosiæ 1 , M. Stamenkoviæ-Radak 2 i M.Anðelkoviæ 1,2 1 Institut za biološka istraivanja «Siniša Stankoviæ», Beograd 2 Biološki fakultet Univerziteta u Beogradu, Beograd Vrste se meðu sobom razlikuju i po akumuliranim razlikama na genetièkom nivou, koje vode reproduktivnoj izolaciji. Meðutim, ukrštanjem jedinki nekih sestrinskih vrsta nastaju intrspecijski hibridi. Pretpostavka je da kod potomstva nastalog takvim ukrštanjem , moe doæi do poremeæaja u ontogenetskoj homeostazi, odnosno razvojnoj stabilnosti jedinki. Pokazatelj promena u razvojnoj stabilnosti moe biti fluktuirajuæa asimetrija, tj. porast varijanse asimetrije pojedinih morfoloških, bilateralno simetriènih osobina. U ovom radu korišæene su jedinke laboratorijskih populcija Drosophila simulans, Drosophila mauritiana i Drosophila melanogaster. Analiziran je stepen uspešnosti u parenju izmeðu jedinki razlièitih vrsta i varijabilnost flukturijaæe asimetrije preko velièine krila u roditeljskoj generaciji i kod dobijenog hibridnog potomstva. Akumilarane razlike izmeðu vrsta ispoljavaju se u razlièitom stepenu na nivou predzigotne reproduktivne izolacije i fenotipske varijabilnosti hibrida. DEVELOPMENTAL STABILITY IN INTERSPECIES HYBRIDS OF Drosophila Species differ through accumulated differences at the genetic level and witch results in reproductive isolation. But, crosses of individuals of some sibling species often give hybrids. It is assumed that offspring, from those crosses, could exhibit disturbance of developmental stability, i.e. ontogenic homeostasis. Fluctuating asymmetry can measure changes in developmental stability, by the increased variance in asymmetry of certain morphological, bilaterally symmetric traits. In the present paper, the flies used were from laboratory stocks Drosophila simulans, Drosophila mauritiana and Drosophila melanogaster. The mating success is analysed between individuals of different species and variability of fluctuating asymmetry of wing size in parental generation and their offspring. The accumulated differences between species are the cause of various degree of prezygotic reproductive isolation and phenotypic variability of hybrids.
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Zbornik - Društvo genetičara Srbije

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