【摘 要】
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Dear Editor,Drought is the most devastating factor limiting the productivity and geographical distribution of rice (Oryza sativa).Several drought-tolerant varie
【机 构】
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Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China“,”
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Dear Editor,Drought is the most devastating factor limiting the productivity and geographical distribution of rice (Oryza sativa).Several drought-tolerant varieties have been developed from drought-tolerant germplasm.These varieties make it imperative to clarity the mechanism of drought responses at the genomic level,which will provide a foundation for future breeding and genetic engineering efforts (Zhou et al.,2007).Yangdao6 (YD6) was used to breed many elite varieties in China,which was developed from Yangdao2 (YD2) through a series of crosses (Supplemental Figure 1).Here,we verified that YD6 seedlings showed better drought tolerance than YD2,Yangdao4 (YD4),and 3021 seedlings (Figure 1A).After drought treatment for 8 d,over 81.9％ of YD2 plants were rolled,which is about three times that of YD6 plants.Recovering normal growth with water,the survival rates of YD6 and YD2 seedlings were 92.2％ and 65.6％,respectively.
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