Title: A Comparative Study on Selection Index for Drought Resistance and Water Saving Varieties of Spring Wheat
Abstract: The morphological and physiological characters,yield components,water use efficiency(WUE) of 20 spring wheat varieties planted in northern spring wheat region were studied systematically under water-saving irrigation and conventional sufficient irrigation conditions.Different drought-resistance and water-saving indices were compared.The results showed that both the yield and WUE of most varieties were ordinary under water saving irrigation,five wheat varieties were selected through systematic cluster analysis for their better economic yield and WUE.Based on drought-resistant index(DRI) evaluation,the drought resistance of Ningchun 41,Longmai 32 and Nongjian 7 were better than that of Yongliang 4,the drought-resistance of Bayou 2 and Nongjian 1 were worse than that of Yongliang 4.By the yield-high water use efficiency index(YHWUEI) evaluation,the water use efficiency of all five varieties was better than that of Yongliang 4.The YHWUEI of spring wheat varieties was correlated positively with economic yield and WUE,but both the drought-resistant index(DRI) and the revised drought-resistant index(DI) were not remarkable correlated with economic yield and WUE,YHWUEI with DRI was an effective way to select spring wheat variety with drought-resistant and water-saving.The main characteristic of drought-resistance,water-saving and high yield spring wheat variety were:1)higher plant height,longer upper internodes length and bigger index of plant height composition;2)medium flag leaf and high photosynthetic efficiency;3) well-developmed and feasible distribution of roots;4) high transportation ratio of the reserves in vegetative organs before the anthesis stage etc.Ningchun41 is a drought-resistant,water-saving and high-yielding spring wheat variety,which could be introduced to plant in Hetao irrigation region,Inner Mongolia.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Cited By Count: 3
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