论文部分内容阅读
为探明山西不同生态型大豆(Glycine max)品种对苗期低温胁迫的应答表现,寻求大豆苗期耐低温性综合评价指标和评价方法,选取了山西普遍种植的‘晋大53’、‘晋大70’和‘晋豆24’3个不同生态型大豆品种,在苗期将材料分别置于14、17和20℃人工气候箱中,保持昼夜恒温,进行低温胁迫处理。分别测定了各品种光合与产量性状值,用基因型主效应及其与环境互作(GGE)双标图分析各性状对品种的效应及性状间的相关性,应用隶属函数法综合评价各品种的苗期耐低温性。结果显示:低温胁迫下不同生态型大豆品种苗期延长1–12天;苗期光合性状值均下降,其中,叶片气孔导度(Gs)和蒸腾速率(Tr)下降最明显;产量性状值均呈下降趋势,单株生物量和单株荚数下降最明显;各项性状在不同品种中对低温的应答效应不同,且性状间存在明显的相关性,可作为耐低温性的评价指标。品种‘晋大70’的耐低温性最佳。
In order to find out the response of different ecotypes of Glycine max variety to low temperature stress at seedling stage in Shanxi Province and to seek comprehensive evaluation index and evaluation method of low temperature tolerance of soybean seedling, Large 70 ’and’ Jin Dou 24’3 different ecotypes of soybean varieties in the seedling stage materials were placed in 14, 17 and 20 ℃ artificial climate chamber, to maintain constant temperature day and night, for low temperature stress treatment. The photosynthesis and yield traits of each cultivar were determined. The main effects of genotypes and their interaction with environment (GGE) were analyzed. The effects of traits on the traits and their correlations were analyzed. The membership functions were used to evaluate the effects of different traits Seedling low temperature resistance. The results showed that the seedling stage of different ecotype soybean varieties was prolonged 1-12 days under low temperature stress; the photosynthetic traits decreased at seedling stage, of which the leaf stomatal conductance (Gs) and transpiration rate (Tr) decreased most obviously; The decrease of biomass per plant and pod number per plant was the most obvious. The responses of different traits to low temperature in different varieties were different, and there was a significant correlation between the traits, which could be used as the evaluation index of low temperature resistance. Variety ’Jin 70’ the best low temperature resistance.