Characteristic of commercial-biological traits of sunflower hybrids of the different origin and correlations between them

The purpose of the work is to determine interrelations between duration of a period emergence - flowering, biometric criteria and elements of productivity in the modem sunflower hybrids. Trials were conducted on fields of VNIIMK, Krasnodar region, in 2010-2012. An object of the research was the modem commercial sunflower hybrids of a different origin (17 domestic and 29 foreign). Phenological observations (a period emergence - flowering) and biometric measurements were conducted within a vegetative period. The results showed that samples with the highest yields (of two compared groups) differed with a higher diameter of sunflower heads - up to 20 cm, bigger quantity of seeds per plant - up to 900-1400 seeds and seeds yield - 50-60 g in average. For sunflower hybrids of the Russian breeding there was determined a positive correlation between: head inclination and a degree of head inclination, thickness and diameter of a head, head thickness and 1000 seeds weight, seeds weight per a head and 1000 seeds weight, quantity of seeds in a head and 1000 seeds weight, and a negative correlation between: a head inclination and yield, a degree of a head inclination and yield, thickness of a head and a head inclination, diameter of a head and head inclination, diameter of a head and a degree of a head inclination, plants height and seeds huskiness. For sunflower hybrids of the foreign breeding there was determined a positive correlation between: duration of a period emergence - flowering and yield, seeds quantity per a head and yield, seeds weight per a head and yield, thickness and diameter of a head, thickness of a head and 1000 seeds weight, head inclination and a degree of head inclination, weight of seeds per a head and 1000 seeds weight, head thickness and seeds weight per a head, seeds weight per a head and its huskiness, quantity of seeds per a head and its weight, 1000 seeds weight and its huskiness, and a negative correlation between: duration of a period emergence - flowering and a head thickness, seeds shattering losses and seeds yield, plant height and a head thickness, plant height and seeds huskiness, thickness and inclination of a head, thickness and a degree of inclination of a head, diameter and inclination of a head, diameter and a degree of inclination of a head, diameter of a head and seed weight per a head, seeds weight per a head and seeds shattering losses.