摘要： There is evindence showing that stress susceptibility index(SSI)(1一Yd/Yp)/(1—(?)d/(?)p)used as a measure of drought resistance of crop on the field is an altered form of droughtresistance coefficient(DRC)(Yd/Yp).The correlative coefficient SSI and DRC is r=-1.Therefore,the SSI doesn't improve the defect of the DRC.After two years experiments per-formed by using thirty winter wheat varieties as trial materials,the concept of drought resistanceindex in crops was put forward.Its expressing equation is:the yield in drylan×drought resis-tance coefficient/average yield in dryland.It makes the drought resistance coefficient(physicalindex)correlate well with the yield in dryland(agronomy index)and is suitable for breeder.
关键词:
crop,
drought resistance index,
cluster analysis
兰巨生, 胡福顺, 张景瑞. The concept and statistical method of drought resistance in-dex in crops[J]. 华北农学报, 1993, 8(S2): 69-73. doi: 10.7668/hbnxb.1993.S2.013.
Lan Jusheng, Hu Fushun, Zhang Jingrui. [J]. ACTA AGRICULTURAE BOREALI-SINICA, 1993, 8(S2): 69-73. doi: 10.7668/hbnxb.1993.S2.013.