Darko Babić

Grain yield and quality of winter wheat genotypes in different environments

Trials with seven genotypes of winter wheat were set up as RCB design at four locations in continental part of Croatia in three repetitions during 2004 and 2005 year. Grain yield and indirect quality traits were analyzed. Statistically significant differences for all traits were found among cultivars (G), locations (L) and years (Y), and for all interactions (GxL, GxY, LxY, GxLxY) except for the interaction GxLxY for protein and wet gluten content and for the interaction term GxL for grain yield. In 2004 year higher grain yields were realized as compared to 2005. The same trend has been reached for all analysed quality traits (2004 was better than 2005) except for sedimentation value. The highest grain yields, test weights and wet gluten content were realized at location Osijek. Highest protein content and sedimentation value were found at location Nova Gradiska. The most yielding genotypes with lowest coefficient of variation for grain yield over locations and years were Seva, Demetra and Srpanjka, while the most favorable quality traits with the lowest coefficient of variation were found for Golubica, Zitarka and Panonka.

Relationship between hordein proteins and malt quality in barley cultivars grown in Croatia

The hordein proteins of ten barley (Hordeum vulgare L.) cultivars grown in region of eastern Croatia were studied for their contribution to the malting quality, particularly relating hordein influence on malt extract yield. The analysis of hordein proteins was carried out by reversed-phase high-performance liquid chromatography (RP-HPLC). The micromalting of investigated barley cultivars and malt analyses were done according to the EBC official methods. The quantitative analysis of hordein proteins has showed that B-hordein was major component, followed by C- and D-hordeins. Among investigated cultivars the malt extract yield varied from 76.8% (cv. Angora) to 82.6% (cv. Scarlett). Spring barleys had on the average higher malt extract yield in contrast to winter barleys. The significant negative correlation between the total hordein content and malt extract yield was found. Among hordein fractions the B-hordein and D-hordein significantly contributed to lower malt extract yield. RP-HPLC analysis of malt hordeins revealed that the amount of hordein degraded during malting significantly correlated with Kolbach index.

Response of winter barley genotypes to Croatian environments — yield, quality and nutritional value

The objective of research was to determine grain yield, hectoliter weight, grain proteins and starch content of 17 winter barley cultivars from trials at four locations (Tovarnik, Nova Gradiska, Pozega and Osijek) and during three years (2002 to 2005). All traits were significantly influenced by year (Y), location (L) and genotype (G) while sowing rate (300 and 450 seeds per m 2 ) and genotype*sowing rate (G*D) did not affect trait means (P>0,05). Interactions as year* sowing rate (Y*D), location*sowing rate (L*D) and year*location*sowing rate caused significant influence to grain yield and proteins and starch content in grains. Regression coefficient “bi”, ecovalence “W i ” and variance of deviations from regressions “S 2 d i ” pointed out best performance of cultivars Barun, Bingo and Gvozd in more intensive growing conditions due to its top yielding, lowest proteins and rich starch content of grains. Opposite to this, best yield and quality performance of cultivars at low input production could be expe...

Response of winter barley genotypes to Croatian environments — yield and quality

The objective of research was to determine grain yield, hectoliter weight, grain proteins and starch content of 17 winter barley cultivars from trials at four locations (Tovarnik, Nova Gradiska, Pozega and Osijek) and during three years (2002 to 2005). AH traits were significantly influenced by year (Y), location (L) and genotype (G) while sowing rate (300 and 450 seeds per m2) and genotype*sowing rate (G*D) did not affect trait means (P<0,05). Interactions as year* sowing rate (Y*D), location*sowing rate (L*D) and year*location*sowing rate caused significant influence to grain yield and proteins and starch content in grains. Regression coefficient “bi”, ecovalence “W,” and variance of deviations from regressions “S2dj” pointed out best performance of cultivars Barun, Bingo and Gvozd in more intensive growing conditions due to its top yielding, lowest proteins and rich starch content of grains. Opposite to this, best yield and quality performance of cultivars at low input production could be expected from cultivars Plaisant, Vanessa, Favorit, Lord and Heraklo.