doiSerbia

Actual prestigious properties of maize inbred lines: A good initial basis for the efficient development of new and yielding maize hybrids

Radenović Čedomir (Institut za kukuruz 'Zemun Polje', Beograd + Fakultet za fizičku hemiju, Beograd)
Filipović Milomir (Institut za kukuruz 'Zemun Polje', Beograd)
Babić Milosav (Institut za kukuruz 'Zemun Polje', Beograd)
Stanković Goran (Institut za kukuruz 'Zemun Polje', Beograd)
Radojčić Aleksandar (Institut za kukuruz 'Zemun Polje', Beograd)
Sečanski Mile (Institut za kukuruz "Zemun Polje", Beograd)
Pavlov Jovan (Institut za kukuruz 'Zemun Polje', Beograd)
Radojčić Branković Dragana (Institut za kukuruz 'Zemun Polje', Beograd)
Selaković Dragojlo (Institut za kukuruz 'Zemun Polje', Beograd)

This study conforms our hypothesis that there are elite maize inbred lines, which can be considered actual and prestigious as they have not only a property of the water status and a greater grain dry down rate during the maturation period, but also a property of the efficient photosynthetic-fluorescence model that is successfully used in the contemporary processes of breeding, and thereby in the development of new and yielding maize hybrids. Presented results obtained on the dynamics of grain dry down during the maturation period and on photosynthetic-fluorescence parameters (temperature dependence of the chlorophyll delayed fluorescence intensity, the Arrhenius plot for the determination of critical temperatures, i.e. phase transition temperatures and the activation energy) show that properties of the observed inbreeds are based on effects and nature of conformational and functional changes occurring in their thylakoid membranes and other chemical structures of grain tissues. Summarized results of studies on actual and prestigious properties of maize inbreeds will contribute to more exact, rational and expeditious proceedings of contemporary processes of breeding.

Keywords: adaptability, chlorophyll delayed fluorescence, drought, grain dry down, high temperature, inbred line, intact leaf, thylakoid membrane, transport processes