6 Zhang Z B, Shao H B, Xu P, et al. On evolution and perspectives of bio-watersaving. Colloids Surf B Biointerfaces, 2007, 55: 1-9？？
[2]
8 Xu Y B, Dominique T, Roman C P, et al. Leaf-level water use efficiency determined by carbon isotope discrimination in rice seedlings:Genetic variation associated with population structure and QTL mapping. Theor Appl Genet, 2009, 118: 1065-1081？？
[3]
15 Bjorn M, Charles G T, Robert K L. Carbon isotope discrimination as a tool to improve water-use efficiency in tomato. Crop Sci, 1999, 39:1775-1783？？
[4]
17 Condon A G, Richards R A, Rebetzke G J, et al. Breeding for high water-use efficiency. J Exp Bot, 2004, 55: 2447-2460？？
[5]
18 Upadhyaya H D. Variability for drought resistance related traits in the mini core collection of peanut. Crop Sci, 2005, 45: 1432-1440？？
[6]
22 Yue B, Xiong L Z, Xue W Y, et al. Genetic analysis for drought resistance of rice at reproductive stage in field with different types of soil.Theor Appl Genet, 2005, 111: 1127-1136？？
[7]
1 Abdelbagi M I, Anthony E H. Inheritance of carbon isotope discrimination and water-use efficiency in cowpea. Crop Sci, 1993, 33:498-503？？
[8]
2 Akihiko K, Babu R C, Boopathib N M, et al. Phenotypic and genotypic analysis of drought-resistance traits for development of rice cultivarsadapted to rainfed environments. Field Crops Res, 2008, 109: 1-23？？
[9]
3 Boyer J S. Plant productivity and environment. Science, 1982, 218: 443-448？？
[10]
4 Howell T A. Enhancing water use efficiency in irrigated agriculture. Agron J, 2001, 93: 281-289？？
[11]
5 Krishnamurthy L, Vadez V, Jyotsna D M, et al. Variation in transpiration efficiency and its related traits in a groundnut (Arachis hypogaeaL.) mapping population. Field Crops Res, 2007, 103: 189-197？？
[12]
7 Impa S M, Nadaradjan S, Boominathan P, et al. Carbon isotope discrimination accurately reflects variability in WUE measured at a wholeplant level in rice. Crop Sci, 2005, 45: 2517-2522？？
[13]
9 Zhao X Q, Xu J L, Zhao M, et al. QTLs affecting morph-physiological traits related to drought tolerance detected in overlapping introgressionlines of rice (Oryza sativa L.). Plant Sci, 2008, 174: 618-625？？
[14]
10 Hugh J E. Stomatal and non-stomatal restrictions to carbon assimilation in soybean (Glycine max) lines differing in water use efficiency.Environ Exp Bot, 2002, 48: 237-246？？
[15]
11 Hufstetler E V, Boerma H R, Carter T E, et al. Genotypic variation for three physiological traits affecting drought tolerance in soybean.Crop Sci, 2007, 47: 25-35？？
[16]
12 Zhang X Y, Chen S Y, Liu M Y, et al. Improved water use efficiency associated with cultivars and agronomic management in the northChina plain. Agron J, 2005, 97: 783-790？？
[17]
13 Yoichiro K, Sawa H, Keisuke N, et al. Identification of QTLs controlling rice drought tolerance at seedling stage in hydroponic culture.Euphytica, 2008, 160: 423-430？？
[18]
14 Mikhail A S, Pierre M, Peter D J. Quantifying effects of simple wheat traits on yield in water-limited environments using a modelling approach.Agricult Forest Meteorol, 2009, 149: 1095-1104？？
[19]
16 Specht J E, Chase K, Macrander M, et al. Soybean response to water: A QTL analysis of drought tolerance. Crop Sci, 2001, 41: 493-509？？
[20]
19 Mian M A, Ashley D A, Boerma H R. An additional QTL for water use efficiency in soybean. Crop Sci, 1998, 38: 390-393？？
[21]
20 Mian M A R, Bailey M A, Ashley D A, et al. Molecular markers associated with water use efficiency and leaf ash in soybean. Crop Sci,1996, 36: 1252-1257？？
[22]
21 岳兵. 水稻后期抗旱遗传基础研究. 博士学位论文. 武汉: 华中农业大学, 2005
[23]
23 Zeng Z B. Precision mapping of quantitative trait loci. Genetics, 1994, 136: 1457-1468
[24]
24 Zhao H, Zhang Z B, Shao H B, et al. Genetic correlation and path analysis of transpiration efficiency for wheat flag leaves. Environ ExpBot, 2008, 64: 128-134
