Various quantitative and qualitative traits of 12 single-cross maize hybrids were studied over a two-year period at three plant densities (45, 65 and 85 thousand plants/ha) at five locations in Hungary. The results confirmed that both the protein and the oil content depended on the environment, but the environment had a greater effect on the protein content than on the oil content. In many cases the protein content of the samples differed to a significantly greater extent between the locations than the oil content. A close correlation was found between the plant spacing and the chemical quality parameters. The protein and oil content of the kernels was greater at lower plant density (45 thousand plants/ha). An analysis of the genotypes showed that in many cases high protein content was combined with high oil content. The highest protein and oil contents were recorded for the hybrid Mv 11, which had the lowest thousand kernel mass of all the hybrids. The maternal parent of Mv 11 was a hard-kernelled flint line. The greatest signficant differences (between the locations and plant densities) were found for the thousand kernel masses of the genotypes. The greatest thousand kernel masses were obtained at low plant density (45 thousand plants/ha). The year also had the greatest effect on the thousand kernel mass. The protein content was less influenced by the year, which had no significant effect on the oil content. Correlation coefficients were calculated between the chemical quality parameters and the thousand kernel mass. A loose correlation (r = +0.338) was found between thousand kernel mass and protein content, while the correlation between thousand kernel mass and oil content was closer (r = +0.553). For the hybrids examined, the highest correlation was found between the protein and oil contents (r = +0.789).
|Translated title of the contribution||Trends in the protein and oil contents and thousand kernel mass of maize under various ecological conditions|
|Number of pages||10|
|Publication status||Published - Aug 2001|
ASJC Scopus subject areas
- Agronomy and Crop Science