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小麦主要种植在半干旱气候条件下,水分通常是限制因子.植物利用有效水分保持地上部发育的能力,很大程度上依赖其根系.在营养生长期,虽然土壤剖面上层的水分可以利用,然而在半干旱气候中,籽粒灌浆期常常无水可用,只有深层根系才能促进籽粒灌浆(Behletal,1986).弄清基因型根系纵向和横向分布的弹性,作为雨养条件下的适应性与地上部发育的机理,将有助于小麦育种者为既定环境培育相应丰产的品种.本研究在灌溉和雨养条件下探讨了春小麦突变体及其母本品种根系的分布和地上部发育模式.
Mainly planted in wheat Under semi-arid climatic conditions, water is usually the limiting factor. Plant use of effective moisture to maintain the development of the upper part of the ability to rely largely on its root system .In vegetative growth period, although the upper soil profile of the water can be used, however In semi-arid climates, the grain filling stage is often water-free, and only deep rooting can promote grain filling (Behletal, 1986). Understanding the vertical and horizontal distribution of root flexibility of genotypes as an indicator of adaptability to above-ground conditions The mechanism of development will help wheat breeders cultivate the corresponding high-yielding varieties for the given environment.In this study, the root distribution and shoot development patterns of spring wheat mutants and their female parent varieties under irrigation and rainfed conditions were discussed.