Za intenzivno gajenje hibrida kukuruza neophodno je, pored komponenti prinosa i drugih agronomski važnih osobina biljke, za objektivnu ocenu njihovih. Ministri Evropske unije odobrili su gajenje kontroverznog genetski modifikovanog novog roda kukuruza, TC američke kompanije DuPont Pioneer. S druge strane, domaće životinje troše tokom uzgoja velike količine semena kukuruza, što sa obzirom na ograničen zemljišni fond obično znači učestalo gajenje.
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Plant Breeding, Genetika, 42 1 Pesticidi i fitomedicinavol. On the other hand, domestic animals require a lot of corn and considering the limited landarea, that often demands repeated sowing of corn continuous croppingconsequently leading to higher pest damages. The model proposed by Eberhart and Russell has been widely employed in the last several decades mostly due to the classification of gajenjs in genotype performance into predictable regression and unpredictable deviation from regression components.
EBSCOhost | | OPLEMENJIVANJE KUKURUZA NA PRINOS I KVALITET.
kukkruza Given the relatively narrow geographic area, the locations selected for the study are representative of the major types of soils used for maize production in this region. A significant interaction was observed between all traits and the environment. Weed Research Materials and methods Eleven double-way maize hybrids developed at the Zemun Polje Maize Research Institute were assessed.
Regression coefficient bi values for grain yield mostly suggested no significant differences relative to the mean. Romanian Agricultural Research, 26, The medium-early hybrids HY03 and HY01 showed significant deviations from regression, and negative values were observed in most other hybrids. With the exception of HY01 showing significant deviations from regression, HY09; HY11 in the first and second years, the other hybrids had non-significant deviations.
OPLEMENJIVANJE KUKURUZA NA PRINOS I KVALITET.
No warranty is given about the accuracy of the copy. Discussion Gajene adaptability and stability are useful parameters for recommending hybrids for known cultivation conditions.
However, this concept is of less importance to breeders and agronomists, who prefer genotypes with high yields and the potential to respond positively kukuuza agronomic inputs and favourable environmental conditions Becker, The results of many authors suggest that hybrids with higher average yields have better adaptation to favourable agroenvironmental conditions, with no linear trend observed due to significant regression deviations i.
The highest regression coefficient was determined in HY06 and the lowest in HY Institut za kukuruz ‘Zemun polje’, Zemun e-adresa: Accomplishments and Perspectives, Belgrade, p. The traits analysed showed significant interaction with the environment.
The hybrids belong to different maturity groups, viz. A strategy to reduce GEI involves selecting cultivars with a better stability across a wide range of environments in order to better predict their behaviour Eberhart and Russell, ; Tai, The value for this parameter was highest in HY09, and that of HY06 was closest to kukurjza average.
Weed Research35 5: A broader picture of grain yield cannot be completely predicted by this model. Field Crops Research, gzjenje 3 The regression coefficient for grain yield for all hybrids except HY02 in was not significantly different from the mean, indicating adaptability of the test hybrids to the environment.
Journal of Applied Ecology38 4: S di R 1,k. Setve je obavljena u provoj polovini aprila u obe godne na svim lokalitetima. The results obtained should point to the possibility of using short-season hybrids instead of medium-late ones, given the balance between yield, yield components and other agronomically important traits, on the one hand, and values of stability parameters, on the other.
The objective of this study was to evaluate grain yield and its components in maize hybrids with different lengths of growing season FAO maturity groups using analysis of variance and regression analysis. HY01 and all hybrids from FAO group gave lower average yields, and kukruza more stable than the other hybrids. During the growing season, in both years, standard cultural practices without irrigation were used.
Stability measures are based either on regression analysis or on principal component analysis Bernardo, Therefore, they can be recommended for intensive cultural practices and low-stress environments.
Moreover, the high value of GEI is often associated with a low correlation between kukurhza and phenotypic values, thereby reducing the selection progress. Measurement methods and problems related to plant density. Sowing was conducted in the first half of April in both years at all locations. This paper offers a review of investigation on project “Maize breeding for high yield and quality of grain and biomass”, No B, financed by Ministry of Science and Environment Protection, Serbia and Montenegro.
Under dynamic stability, a genotype or cultivar attains a constant high yield response to changes in the environment.
Medium-late hybrids had higher yields and showed a better response to favourable environmental conditions compared to early-maturing hybrids. However, the fact that the independent variable environmental index in this model can be used before the experiment may be considered a limitation to interpreting deviations from regression as being a measure of cultivar stability.
Where Do We Stand?
Acta biologica iugoslavica – serija G: Crop Science, 26, Regardless of maturity group, HY01 and HY11 with low values for this trait in almost all years had significantly lower regression coefficient values.
Weed Technology9, str. The hybrids belonging to low maturity groups have higher adaptability, but show a low response to the environment and, hence, frequent inability to make use of favourable conditions Troyer Significant differences in the trait were observed between hybrids as well as between locations.
The regression coefficient values in all hybrids did not significantly differ from the mean, with the hybrid HY09 being the closest to the average value. Using this criterion, Flores et al.
Most medium-early hybrids give low yields, along with generally favourable values of stability parameters i.