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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The highest average value for ear length in the first year was found in HY08, and the lowest in HY Crop Science, 26, Field Crops Research, The regression coefficient of HY05 was closest to the mean. The association between lower average values of a particular trait and greater than average stability was also observed in ear length. In the first year, the linear regression coefficient was significantly lower in HY07, whereas no significant differences from the mean value were observed in the other hybrids.
Significant differences in the trait were observed between hybrids as well as between locations. Setve je obavljena u provoj polovini aprila u obe godne na svim lokalitetima.
OPLEMENJIVANJE KUKURUZA NA PRINOS I KVALITET.
Half of the other hybrids showed significant values, whereas the other half showed negative values Table 2. Agronomy Journal, 85, Weed Technology9, str. Identifying stable genotypes is often complicated by the presence of genotype x environment interaction GEI.
American Society of Agronomy. Moreover, if the regression coefficient does not show significant differences across genotypes, regression lines can be grouped, with only gajebje from regression being used as a stability parameter for genotype classification.
Accomplishments and Perspectives, Gwjenje, p. The results of many authors suggest kuouruza hybrids with higher average yields have better adaptation to favourable agroenvironmental conditions, with no linear trend observed due to significant regression deviations i. Remember me on this computer. However, Alwala et al. However, remote access to EBSCO’s databases from non-subscribing institutions is not allowed if the purpose of the use is for commercial gain through cost reduction or avoidance for a non-subscribing institution.
Herbologia, Sarajevo1, br. Weed Science46 2 Sowing was conducted in the first half of April in both years at all locations. Each hybrid was sown in four rows per replication with 17 hills each with two plants per row at a spacing of 57 cm, making up a plant density of 50, plants ha Grain moisture content at harvest was highest in medium-late hybrids HY10 and HY11, with HY11 having the highest average value for the trait.
Discussion Genotype adaptability and stability are useful parameters for recommending hybrids for known cultivation conditions. Photosyinthetica29, str. 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.
Log In Sign Up. The medium-early hybrids HY03 and HY01 showed significant deviations from regression, and negative values were observed in most other hybrids.
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The same authors underlined that regression analysis, although widely used in the previous period, provides useful information on genotype stability. Journal of Applied Ecology38 4: Weed Sci46, str. Zemlodelie1, str.
Regardless of maturity group, HY01 and HY11 with low values for this trait in almost all years had significantly lower regression coefficient values. Genetics and Molecular Biology, 23, Introduction Identification of genotypes with a high potential for yield and stability across environments is an essential task in plant breeding. Field Crops Research, 56 3 The efficacy of selection for grain yield potential could be increased by indirect selection via characters highly correlated with grain yield such as stay green.
Skip to main content. The regression coefficient of HY07 was closest to the mean value 1. Where Do We Stand? Agronomy Journal88, str. Therefore, they can be recommended for intensive cultural practices and low-stress environments. An estimation of this parameter is largely dependent upon weather conditions during the experimental years.
Crop Science, 37, The association found by Ordas et al.
Given the relatively narrow geographic area, the locations selected for the gajenj are representative of the major types of soils used for maize production in this gajwnje. Upon plant emergence, the crop was thinned to obtain the planned plant number. FAO group hybrids, being more stable, can be recommended for less favourable agroenvironmental conditions including low-intensity cultural operations and stressful environments. Among medium-early hybrids, HY06 gave higher grain yields as compared to medium-late hybrids in almost all trials in both years, but also had higher values of the regression coefficient and showed mostly significant deviations from regression.
Weed Science44 2 As compared to medium-early lukuruza, medium-late hybrids FAO and mostly exhibited unfavourable values of stability parameters i. Likewise, genotypes having a high value of S2di are considered highly unstable, whereas those with low values as highly stable.