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

Abstract

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.

Idejom za ovaj rad potvrđuje se naša hipoteza da postoje elitne linije kukuruza koje se smatraju aktuelnim i prestižnim i koje poseduju, kako svojstvo stanja vode i njenog bržeg otpuštanja iz zrna u periodu sazrevanja, tako i svojstvo efikasnog fotosintetično-fluorescentnog modela, koji se uspešno koristi u savremenim procesima oplemenjivanja, a time i za stvaranje novih i rodnijih hibrida kukuruza. Izloženi rezultati o dinamici otpuštanja vode iz zrna u periodu sazrevanja i o fotosintetično-fluorescentnim pokazateljima: teperaturnoj zavisnosti intenziteta zakasnele fluorescencije hlorofila, Arrhenijus-ovim kriterijumom za određivanje kritičnih temperatura i energija aktivacije, pokazuju da su svojstva proučavanih linija zasnovana na efektima i prirodi strukturnih i funkcionalnih promena koje se odigravaju u njihovim tilakoidnim membranama i drugim hemijskim strukturama tkiva zrna. Sumarni rezultati proučavanja aktuelnih i prestižnih svojstava linija kukuruza doprineće egzaktnijem, racionalnijem i bržem odvijanju savremenih procesa oplemenjivanja.