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小麦根系特性对耐旱耐涝是很重要的，然而还不清楚软红粒小麦品种间根系差异以及根系大小与耐旱涝的相关程度。本研究旨在观察小麦基因型间根系是否存在差异及根系大小同耐涝和营养生长初期干旱的相关性。研究发现４０个溶液培养４ｗｅｅｋ的小麦基因型根鲜重、苗鲜重、４０ｃｍ以上根数、最大根长和总根长存在差异，这些性状中每一性状均与其它性状呈正相关。从４０个小麦基因型中选择１２个根系大小不一样的基因型在温室作３ｗｅｅｋ的土壤湿度试验，对照、水涝和干旱处理２１ｄ。水涝不影响苗鲜重和分蘖数，但根鲜重降低．干旱明显降低这３个参数。基因型和湿度处理之间在苗鲜重、根鲜重和分蘖数方面互作显著。溶液培养下的根苗生长与对照和涝条件下的根苗生长有关，但与干旱条件下的无关。由此可见，土壤温度有效性影响基因型根系生长的潜在表现，溶液培养生长快的小麦幼苗在土壤充分灌溉或水涝条件下初期生长较快，而严重干旱条件下则相反。）和水涝处理（ｒ＝０．７５）溶液培养温室种植间苗鲜重线性相关表现趋势相则，时照和水浇处理ｒ值都是０．７：１””，干旱处理ｒ值是一０．３４。简单自由度比较（ｐＭＯ．０５）表明，对照和水涝处理的大根系！ｆｉ比小根系组根苗鲜重较高，但严重干子情?
Root traits of wheat are important for drought and waterlogging tolerance, however, it is not clear what is the difference between the roots of soft red wheat cultivars and the correlation between root size and drought / flood resistance. The purpose of this study was to investigate the differences in root systems between wheat genotypes and the correlation between root size and waterlogging and drought at the beginning of vegetative growth. The results showed that the root weight, fresh weight, number of roots above 40 cm, maximum root length and total root length of four wheat cultivars with 40weeks of cultivars were different. Each of these traits was positively correlated with other traits. Twelve root-mean-square genotypes were selected from 40 wheat genotypes for 3week soil moisture tests in greenhouse. Control, waterlogging and drought treatments were performed for 21 days. Waterlogging does not affect the fresh weight and tiller number, but the root fresh weight decreases. Drought significantly reduced these three parameters. There was significant interaction between genotype and humidity in seedlings fresh weight, root fresh weight and tiller number. Roots and shoots growth under solution culture was related to root and shoot growth under control and waterlogging conditions, but not under drought conditions. Thus, the effectiveness of soil temperature affected the potential performance of genotype root growth. The fast growing wheat seedlings grew faster initially in the soil under full irrigation or waterlogging conditions, but the opposite in severe drought conditions. ) And the waterlogging treatment (r = 0.75), the linear correlation trend of the fresh weight of the seedlings in the greenhouse was the same, the value of r was 0.7: 1 " 0.34. Comparison of simple degrees of freedom (pMO.05) shows that the control and waterlogging treatment of the root system! Fi than the root system root fresh weight is higher, but serious dry child?