Abstract:

There were twelve dryland wheat varieties that widely planted or new released in Shanxi Province, the difference of grain yield and water use efficiency (WUE) and other traits of these different wheat varieties were studied under rainfed condition in the south of Shanxi Province. The results showed that there were distinct genetic difference in yield, WUE, rainfall productivity among these wheat varieties, according with their yield and WUE these varieties could be classed three kinds as follows, one type was high yield and high WUE type, its yield is above 2900 kg/hm2, WUE was 16.89 kg/(hm2?mm); the second type was middle yield and middle WUE, its yield was between 2700 and 2900 kg/hm2, WUE was 16.08 kg/(hm2?mm); the third type was low yield and low WUE, its yield was below 2700 kg/hm2, WUE was 15.62 kg/(hm2?mm). There was difference in water consumption coefficient and rainfall productivity among these wheat varieties. The range of water consumption coefficient amounts to 132.11. The range of rainfall productivity amounts to 2.81 kg/(hm2?mm). That meant the variety that with good drought resistance and high WUE and high yield traits could be breed by genes convergent cross, Meanwhile, high yield and high WUE varieties should be widely planted in dryland, middle yield and middle WUE should be plant as the collocation varieties in dryland.