小麦品种抗旱性鉴定产量指标的比较研究

为了筛选适宜于小麦品种抗旱性鉴定的指标，在旱棚鉴定条件下，以国家北部冬麦区旱地组区试抗旱鉴定品种为试材，对抗旱系数、干旱敏感指数、抗旱指数和抗旱指数修订式等抗旱鉴定产量指标进行了比较研究。结果表明小麦品种抗旱鉴定与小麦抗旱种质筛选不同。抗旱系数反映材料的稳产性，对于小麦种质抗旱性筛选更直观。抗旱指数修订式以对照品种的表现为参照，兼顾品种的相对产量（抗旱系数）和绝对产量，便于与品种区试和品种产量比较试验结合，可操作性强，是目前最适用于小麦抗旱育种和区域试验的综合性抗旱鉴定指标。

A Comparative Study on Yield Index of Wheat varieties Drought Resistance

In order to demarcate the drought resistance yield index, using the winter wheat varieties of dry-land wheat in the regional test in north part of China as trial materials, DRC, SSI, DRI and DI were studied. The results showed that it was different the wheat varieties drought resistance measurement and the wheat germplasm resources screening with drought resistance, DRC expressed the stable yield ability of the wheat varieties, it was clearer to jig drought resistance wheat germplasm resources. Compared with the wheat varieties as contrast, DI included the opposite yield (drought resistance coefficient) and absolute yield of the wheat variety, it was more operational to combine the drought resistance measurement with the regional test and wheat varieties yield experiments. Therefore, the DI would be the comprehensive drought resistance measured index; it was the most perfect to be used in the wheat varieties regional test and wheat drought breeding.