Log In Sign Up. Weed Science44, str. Grain moisture content at harvest was highest in medium-late hybrids HY10 and HY11, with HY11 having the highest average value for the trait. Plant Breeding,1— Results and discussion The analysis of variance revealed significant differences in grain yield, grain moisture content at harvest, 1,kernel weight and ear length between hybrids belonging to different maturity groups and between locations Table 1. Book of Abstracts International Maize Conference: Introduction Identification of genotypes with a high potential for yield and stability across environments is an essential task in plant breeding.
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Kakora 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 kuukruza of stability parameters, on the other.
Photosyinthetica29, str. 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.
Most medium-early hybrids give low yields, along with generally favourable kuouruza of stability parameters i. However, this concept is of less importance to breeders and agronomists, who prefer genotypes with high yields and the potential to respond positively to agronomic inputs and favourable environmental conditions Becker, 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, Crop Science, 11, Short-season hybrids generally have a lower genetic potential for yield as compared to medium-late hybrids, but show more favourable values of stability parameters.
Among medium-season hybrids, HY06 gave higher yields and had less favourable values of stability parameters compared to medium-late hybrids. The same authors underlined that regression analysis, although widely used in the previous period, provides useful information on genotype stability. 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.
Hybrids belonging to FAO maturity groups and mostly exhibited unfavourable values of stability parameters for all traits, showing a specific response and better adaptation to favourable environmental conditions, gajenme gave higher average yields compared to early hybrids. 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 Agronomy Journal, 85, However, Alwala et al.
Weed Sci37, str. Elsevier, Amsterdam, The Netherlands. Parametri stabilnosti prinosa zrna i komponenti prinosa hibrida kukuruza razlicitih FAO grupa zrenja. Plant Breeding,1— Current knowledge and new research targets. The regression coefficient of HY07 was closest to the mean value 1. Weed Sci46, str. Mehurasta gar The traits analysed showed significant interaction with the environment. Moreover, if the regression coefficient does not show significant differences across genotypes, regression lines can be grouped, with only deviation from regression being used as a stability parameter for genotype classification.
The medium-season hybrid gave high yields and less favourable values of stability parameters at most locations and in most years, as compared to medium- late hybrids. Zbornik radova Instituta za ratarstvo i povrtarstvo, Novi Sad, 33, The highest regression coefficient was determined in HY06 and the lowest in HY Medium-late hybrids had higher yields and showed a better response to favourable environmental conditions compared to early-maturing hybrids. The model proposed by Eberhart and Russell has been widely employed in the last several decades mostly due to the classification of variation in genotype performance into predictable regression and unpredictable deviation from regression components.
Conversely, the hybrids giving high values for the trait, with HY03 and HY06 as representatives of lower maturity groups, had coefficient values greater than 1 and, occasionally, significantly higher values. The soils at these locations differed in yajenje and general fertility. Weed Science The regression coefficient of HY05 was closest to the mean. Ecological Applications3 1: Therefore, they can be recommended for intensive cultural practices and low-stress environments. Poljoprivredni fakultet, Magistarska teza.
Crop Science Zemlodelie1, str. 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. Journal of Hill Research 9 1 In this model, a regression coefficient greater than 1.
Eberhart and Russell described them as potentially ideal hybrids, since they maintain good performance under unfavourable growing conditions. Sowing was conducted in the first half of April in both years at all locations. Setve je obavljena u provoj polovini aprila u obe godne na svim lokalitetima.
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