引言在作物育种程序中,为了初步评价一套遗传基因型的产量潜力需要选择理想的地区,这些地区要能反应出那些基因型在广泛环境中的相对潜力,才可望选为种植的试验地点。然而,在这种试验地区的选择中,常常是决定于机会和主观因素,诸如试验地点的方便条件、政府的政策、高等学校或农业研究机关受赠的 INTRODUCTION In crop breeding programs, the initial potential of a genotype for yield determination needs to be ideally selected in areas that reflect the relative potential of those genotypes in a wide range of settings before they can be selected as sites for planting . However, the choice of such a test area often depends on opportunities and subjective factors such as the conditions of convenience of the test site, government policies, gifts received by institutions of higher education or agricultural research institutions