农作物品种联合区域试验,是从育种到推广的最后一个很重要的环节。多种作物都有各级(全国、大区、省、地、县)联合区试,其产量、特征、特性和抗性等资料是很丰富的。除常规的联合区试产量结果的方差分析外,自六十年代以来,国外一些学者利用区试资料,通过计算品种稳产性参数来评 Regional trials of crop varieties in combination, from breeding to promotion of the last one very important part. A variety of crops have all levels (national, regional, provincial, prefectural and county) joint zone test, its yield, characteristics, characteristics and resistance and other information is very rich. In addition to the variance analysis of the conventional test results of the joint zone, since the 1960s, some foreign scholars have used the regional test data to evaluate the stability of the varieties