Traits of prestigious maize inbred lines relevant for the contemporary production of quality hybrid seed

Abstract

The obtained results confirm the hypothesis that there are maize elite inbred lines (ZPPL 62 and ZPPL 233) that are considered prestigious and are characteristic by their water status and a greater rate of a dry down during the grain maturation. Also, they are characteristic by their efficient photosynthetic-fluorescence photo-model, which is successfully used in the contemporary technological productions of maize hybrid seed. The presented results on the dynamics of grain dry down during the maturation period and on photosynthetic and fluorescence parameters: temperature dependency of the intensity of delay chlorophyll fluorescence, the Arrhenius plot for the determination of critical temperatures (phase transition temperatures), activation energy and the angle between the ear leaf and the stalk of the maize plant, show that traits of observed inbreds are mainly based on good effects and nature of conformational and functional changes that occur in their thylakoid membranes and other chemical structures of grain and leaf tissue. Some other properties of observed prestigious maize inbred lines relevant to the seed production were also analyzed in this study.

U ovom radu potvrđuje se hipoteza da postoje elitne samooplodne linije kukuruza koje se smatraju prestižnim i koje poseduju, kako svojstvo stanja vode i njenog bržeg otpuštanja iz zrna u periodu sazrevanja, tako i svojstvo efikasnog fotosintetično-fluorescentnog fotomodela, koji se uspešno koristi u savremenim tehnologijama proizvodnje hibridnog semena kukuruza. Izloženi rezultati o dinamici otpuštanja vode iz zrna u periodu sazrevanja i o fotosintetično-fluorescentnim pokazateljima: teperaturnoj zavisnosti intenziteta zakasnele fluorescencije hlorofila, Arenijusovim kriterijumom za određivanje kritičnih temperatura (temperature faznih prelaza), energija aktivacije i veličine ugla između lista na klipu i stabljike kukuruza, pokazuju da su svojstva proučavanih linija zasnovana na dobrim efektima i prirodi strukturnih i funkcionalnih promena, koje se odigravaju u njihovim tilakoidnim membranama i drugim hemijskim strukturama tkiva zrna i lista. U radu se analiziraju i druge relevantne semenarske karakteristike proučavanih prestižnih samooplodnih linija kukuruza.