Soil salinity can limit plant growth and productivity. The cultivation of tolerant varieties is convenient and cost-effective for making good use of the saline soils.The sweet sorghum plant has a high tolerance for sa...Soil salinity can limit plant growth and productivity. The cultivation of tolerant varieties is convenient and cost-effective for making good use of the saline soils.The sweet sorghum plant has a high tolerance for saline alkaline soils. The KF1210-3 and KF1210-4 early-maturity mutants of sweet sorghum were obtained via carbon ion irradiation. The study assesses the productivity of three sweet sorghum cultivars(KF1210-3, KF1210-4, and KFJTCK) which were grown in intermediate(4.6 d S m^(-1)) and high(11.9 d S m^(-1)) soil salinity. The sweet sorghum grown in the soil salinity of 4.6 d S m^(-1)produced 50.00–57.30 %greater fresh weight than that in the soil salinity of11.9 d S m^(-1), while the difference was not as obvious among the dry biomass of the three sweet sorghum cultivars. Moreover, the Brix degree of the sweet sorghum grown in the soil salinity of 11.9 d S m^(-1)was greater than that grown in the soil salinity of 4.6 d S m^(-1). The heavy ion irradiation experiment is of great significance in screening plant mutants, improving environmental conditions, and assessing the productivity. This process, in turn, aids in the understanding of the effects of the biochemical and physiological mechanisms of salt stress.展开更多
文摘为了更好地理解水稻早熟性的遗传机制,对隐性早熟突变体ref进行了遗传分析和基因定位。突变体ref对光周期不敏感,与6个晚熟品种(系)杂交F1代均为晚熟。ref×嘉禾218 F2分离群体抽穗期呈现连续双峰分布,早抽穗和晚抽穗之比符合1∶3的分离比,表明ref早熟性主要受1对隐性早熟基因控制。F2群体中1 005株早熟和晚熟单株组成定位群体,混合基因池分析发现5号染色体上SSR标记RM7302和RM3853与突变体ref早熟基因连锁。构建5号染色体的连锁图谱,进行表型和标记基因型的连锁分析,进一步确认突变体ref早熟基因定位在标记RM7302和RM3853之间18.32 c M的遗传区间内。
基金supported by the STS Project(KFJ-EW-STS-086)the Western Light Co-scholar(29Y406020)Program of the Chinese Academy of Sciences
文摘Soil salinity can limit plant growth and productivity. The cultivation of tolerant varieties is convenient and cost-effective for making good use of the saline soils.The sweet sorghum plant has a high tolerance for saline alkaline soils. The KF1210-3 and KF1210-4 early-maturity mutants of sweet sorghum were obtained via carbon ion irradiation. The study assesses the productivity of three sweet sorghum cultivars(KF1210-3, KF1210-4, and KFJTCK) which were grown in intermediate(4.6 d S m^(-1)) and high(11.9 d S m^(-1)) soil salinity. The sweet sorghum grown in the soil salinity of 4.6 d S m^(-1)produced 50.00–57.30 %greater fresh weight than that in the soil salinity of11.9 d S m^(-1), while the difference was not as obvious among the dry biomass of the three sweet sorghum cultivars. Moreover, the Brix degree of the sweet sorghum grown in the soil salinity of 11.9 d S m^(-1)was greater than that grown in the soil salinity of 4.6 d S m^(-1). The heavy ion irradiation experiment is of great significance in screening plant mutants, improving environmental conditions, and assessing the productivity. This process, in turn, aids in the understanding of the effects of the biochemical and physiological mechanisms of salt stress.