农作物定位优选法选种定位优选法就是根据农作物的最佳遗传优势部位进行选种，也叫定位选种法。但这种选种法只适用于常规作物，杂交品种不宜使用。几种农种物选种的优势部位是：１．玉米是中部优势作物，其最佳优势部位是果穗中下部，选用这一部位的籽粒做种，比用顶部籽... Optimal method of crop location selection Selection method is based on the best location of genetic predisposition for crop selection, also known as positioning and selection method. However, this selection method is only applicable to conventional crops, hybrid varieties should not be used. Several kinds of agricultural species selection of the dominant parts are: 1. Corn is the central advantage of crops, the best advantage of the lower part of the ear is the ear, the use of this part of the seeds do seed, with the top seed ...