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- Title
PRINOS ZRNA NS HIBRIDA KUKURUZA RAZLIČITIH PERIODA SELEKCIJE.
- Authors
Ivanović, M.; Vasić, N.; Jocković, Đ.; Stojaković, M.; Nastasić, A.
- Abstract
During the past decade, the current commercial maize hybrids had been rapidly substituted by new selected cultivars (in regards to the previous 30 years), so that estimated "hybrid-commercial life" (cycle) appears to be reduced from the 10 years to the 5 years period. Our objective for this study was to test grain yield differences among NS maize hybrids representing different eras of breeding (realized from the 1989 to the 2004.) We used the results from the post-official trials evaluated at seven locations in 2005. The hybrids grain yield increased at a rate (measured by regression coefficient) of 0.28t/ha per cycle, or about 56kg/ha per year. The results of polynomial ANOV-a regression model showed significant (P<0.05) value for the linear effect only. On the same time, the relative contribution of the quadratic and cubic sum of squares to the hybrids (cycles) sum of square were negligible (F<1).
- Subjects
HYBRID corn; GRAIN; CROP yields; PLANT breeding; CORN; REGRESSION analysis
- Publication
Zbornik Radova - A Periodical of Scientific Research on Field & Vegetable Crops, 2006, Vol 42, Issue 2, p15
- ISSN
0354-7698
- Publication type
Article