Methodological approaches in the selction of very early maize hybrids (FAO 100-149) in lower Volga region

The article presents the results of environmental testing of maize hybrids (FAO 100-149, 2008-2016) created in different Russian selection centers. The volume of the nursery ranged from 18 to 50 items. The coefficients of skewness and kurtosis of the grain yield, harvest moisture and biochemical indicators were not significant at a 5% level, it means that the distribution of parameters was normal. The important feature of a rather longterm testing of hybrids was a significant variation of hydrothermic factor (0.32-1.1). The hybrids were under similar conditions. In 2010, a sharp decrease (more than twice) in the maize grain yield was recorded under the conditions of extreme drought, especially in the 2nd half of vegetation period. The period of 2012-2016 was characterized by a relatively stable yield of the standard and best maize hybrids developed in Russian National Research University. The ranking of hybrids at an average yield was the following order: (Ross 140 SV) < Ik < Om < Kr < Fo < KS < YuV < Po. The harvest moisture of grains indicated the technological option to dry grains received from early maize hybrids, since the actual excessive moisture could be removed without any significant difficulties. The ranking of hybrids at average harvest moisture was in the following order: Ik < Om < Kr < Fo < st (Ross 140 SV) < KS < YuV < Po. The testing revealed a variation in the biochemical content of the grains received from the maize hybrids. The ranking of the best hybrids at an average crude protein content was in the following order: Kr < Om < KS < Ik < Po < control (Ross 140 SV) < Fo < YuV.

кукуруза, гибриды, производство семян, урожайность, семеноводство, продуктивность, протеин, изменчивость, maize, hybrids, seed production, yield, seed growing, productivity, protein, variability

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4. ГОСТ 13496.15-97 «Корма, комбикорма, комбикормовое сырье. Методы определения содержания сырого жира».

5. ГОСТ 13496.2-91 «Корма, комбикорма, комбикормовое сырье. Метод определения сырой клетчатки».

6. ГОСТ 26226-95 «Корма, комбикорма, комбикормовое сырье. Метод определения сырой золы».