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玉米是天津市第一大粮食作物,其中夏玉米属黄淮海夏播玉米区和京津唐夏播玉米区交汇点,生育期在100d左右,主要病害是玉米小斑病、茎腐病。区域试验主要通过算术平均值法评价品种的高产、稳产和适应性,通常采用多年多点试验材料进行联合方差分析,估计试验合并误差,并进行品种间差异显著性比较。由于环境差异大,试点数据相差悬殊或试点报废等原因,影响了对品种做出客观、公正的评定。另外,试点代表性和鉴别力也是产量稳定性和品种适应性分析中必不可少的
Corn is the largest grain crop in Tianjin. Summer maize belongs to the summer sowing maize area of Huang-Huai-Hai and the summer sowing maize area of Beijing, Tianjin and Tangshan. The growth period is about 100 days. The main diseases are the small spot blight of corn and stalk rot. The regional experiment mainly evaluates the high yield, stable yield and adaptability of varieties by means of arithmetic average method, and uses multi-year and multi-point test materials to carry out joint variance analysis, estimates the error of experimental integration and makes significant comparison among varieties. Due to the large differences in environment, the disparity of pilot data or the retirement of pilot projects, the assessment of breed objectively and impartially has been affected. In addition, pilot representation and discrimination are also essential for yield stability and variety suitability analysis