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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。
In order to screen the index suitable for drought resistance identification of wheat cultivars, drought resistance index, drought sensitivity index, drought resistance index and drought resistance index were revised under the condition of understory identification, And other drought-resistant yield indicators were compared. The results showed that drought resistance identification of wheat cultivars was different from that of wheat drought-resistant germplasms. The drought-resistance coefficient reflects the stability of the material and is more intuitive for drought resistance screening of wheat germplasm. The revised drought resistance index is based on the performance of the control breeds and takes into account the relative yield (drought resistance coefficient) and absolute yield of the breeds, which is convenient for combining with the regional trial of varieties and the comparative yield test of cultivars, and has strong maneuverability and is the most suitable for drought resistance breeding of wheat And regional drought resistance comprehensive evaluation index.