小麦对土壤硼水平反应的基因型差异研究

来源 :植物营养与肥料学报 | 被引量 : 0次 | 上传用户:acidliu1
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研究了小麦不同基因型发芽出苗和结实性对土壤硼水平的反应。结果表明,在中低硼水平下(硼酸<25mg/kg),小麦的发芽和出苗表现正常,而在高硼胁迫(硼酸100mg/kg)下,出苗期推迟,出苗率显著降低;土壤硼水平对小麦分蘖的影响因基因型而异,高硼水平下,Sonora64和SW41分蘖迟缓,单株分蘖数显著减少,相比较,浙麦1号和西引2号受影响较小;SW41的结实性对硼水平反应敏感,中低硼水平下自交结实率很低,而其它3个品种在不同硼水平下结实率表现比较稳定,特别是浙麦1号,在低硼水平下,自交和异交的结实性均很高。小麦植株的硼含量,苗期在不同硼水平下差异很小,而抽穗成熟期与外界硼水平呈线性关系,不同硼水平之间差异十分显著,结实性与植株体内硼浓度之间无一定的联系。 The responses of germination and seed setting of different genotypes to boron in soil were studied. The results showed that the germination and emergence of wheat were normal at low and medium levels of boron (boric acid <25 mg / kg), while the emergence rate was significantly reduced under high boron stress (boric acid 100 mg / kg) The effect on wheat tillering varied with genotypes. Under high boron levels, Sonora64 and SW41 had slower tillering and fewer tillers per plant, compared with that of Zhejiang wheat 1 and Xiyu 2. Sensitive to the boron level, the rate of selfed seed setting was very low at medium and low boron levels, while the other three varieties showed relatively stable seed setting rates at different boron levels, especially at the low boron level Outcrossing of the strong are high. The boron content and the seedling stage of wheat plants showed little difference at different boron levels, but there was a linear relationship between the boron level at the heading stage and the outside. There was a significant difference between different boron levels. There was no certain difference between boron concentration and plant biomass contact.
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