Zbornik - Društvo genetičara Srbije
Zbornik - Društvo genetičara Srbije
Zbornik - Društvo genetičara Srbije
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IV-Usm-16 ZBORNIK ABSTRAKATA III KONGRESA GENETIÈARA SRBIJE 105<br />
Subotica, 30. novembar - 4. decembar 2004.<br />
STVARANJE HIBRIDA KUKURUZA TOLERANTNIH<br />
NA RAZLIÈITE GUSTINE GAJENJA<br />
M. Rošulj, Jelena Vanèetoviæ, Zorica Pajiæ i G. Todoroviæ<br />
Institut za kukuruz «Zemun Polje», Zemun Polje, Beograd<br />
Prinosi modernih hibrida kukuruz (Zea mays L.) zavise uglavnom od velikih gustina<br />
gajenja. Pri niskim gustinama gajenja razlike izmeðu novih i starih hibrida su vrlo male i<br />
postaju sve veæe kako se gustina gajenja poveæava. U Srbiji i Crnoj Gori proizvoðaèi<br />
kukuruza oduvek su više voleli hibride èiji prinos nije uslovljen gustinom gajenja zbog<br />
èestih suša, poleganja, bolesti i cene semena.<br />
Cilj ovog istraivanja je bio da se utvrdi moguænost stvaranja hibrida tolerantnih na<br />
razlièite gustine gajenja putem rekurentne half – sib selekcije sa inbred testerom. Pet<br />
elitnih inbred linija je odabrano sa formiranje poèetnog ciklusa. Biljke su samooploðene i<br />
ukrštene sa opozitnim elitnim inbred testerom. Potomci su testirani u dve gustine (10.428<br />
i 90.533 biljaka ha -1 ).<br />
Najboljih pet potomaka iz obe gustine uzeti su za formiranje sledeæeg ciklusa selekcije.<br />
Rezultati nakon prvog ciklusa selekcije pokazuju da je moguæe stvoriti hibride tolerantne<br />
na gustinu gajenja.<br />
DEVELOPING MAIZE HYBRIDS TOLERANT TO<br />
DIFFERENT PLANT DENSITIES<br />
Yield of modern maize (Zea mays L.) hybrids depends heavily on high plant densities. At<br />
lower plant densities, differences between older and newer hybrids were small, becoming<br />
greater as plant density increased. In Serbia and Montenegro farmers have always favored<br />
density independent hybrids because of very common drought, seeding cost, lodging,<br />
diseases etc.<br />
The objective of this study was to determine the possibility to develop density independent<br />
maize hybrids trough recurrent half – sib selection with inbred tester. Five elite inbred<br />
lines were chosen to form cycle 0. Plants were selfed and crossed to opposite elite inbred<br />
tester. Progenies were tested at two densities (10.428 and 90.533 plants ha -1 ).<br />
Best five progenies from both densities were taken to form next cycle. Results after one<br />
cycle of recurrent selection show that is possible to develop density tolerant maize hybrids.
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