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在乌克兰的集体农庄和国营农场,由于制种田产量较低,还未能按照品种区划充分供应玉米一代杂交种。众所周知,父母本植株间在生产量、株高、穗位、茎粗、叶面积、根系的发育以及花粉形成能力等方面都有差异。因此,在制种区必须考虑到保证杂交组合的正确行比和最适宜的种植密度。我们研究的目的是探讨杂交种新种植区域亲本对栽培条件的反应和确定播种方式、行比及种植密度,以保证获得杂交一代种子的最高产量。
In Ukraine’s collective farms and state-owned farms, the first-generation hybrids of maize have not yet been fully supplied in accordance with the breed division because of lower yields. It is well-known that there are differences between the parents of the plants in terms of production, plant height, ear position, stem diameter, leaf area, root development and pollen formation ability. Therefore, it is important to consider the correct ratio of lines and the most appropriate planting density to ensure the cross combination in the seed production area. The purpose of our study was to investigate the response of the parents of newly grown hybrids to the cultivation conditions and to determine the sowing method, lineage ratio and planting density in order to ensure the highest yield of the first generation of hybrids.