本研究以温州芜菁(Brassica rapa L. em. Matzg.,2n=20,AA)为母本,水果紫苤蓝(B. oleracea L. var. caulorapa DC,2n=18,CC)为父本进行远缘杂交,创造种间杂种。通过花期剥蕾授粉、子房培养共获得2株杂种,经扩繁得到无性苗19株,经形态学...本研究以温州芜菁(Brassica rapa L. em. Matzg.,2n=20,AA)为母本,水果紫苤蓝(B. oleracea L. var. caulorapa DC,2n=18,CC)为父本进行远缘杂交,创造种间杂种。通过花期剥蕾授粉、子房培养共获得2株杂种,经扩繁得到无性苗19株,经形态学分析、细胞学观察和RAPD分子鉴定出2株均为温州芜菁×紫苤蓝的真杂种,后利用染色体加倍获得异源四倍体新型芜菁甘蓝新种质材料(AACC,2n=38)。两杂种株系出现茎色分离,根部与茎部均有膨大,但程度低于亲本。异源四倍体的花器官较大,花药发育正常,可育花粉率高。本研究所创制的异源四倍体新种质,在一定程度上拓展了芸薹属蔬菜种质资源的遗传基础。展开更多
Heavy oil will play an important role in future resources exploitation.Factors such as reservoir heterogeneity and adverse oil/steam mobility ratio have led to severe steam channeling and fingering,thereby reduced con...Heavy oil will play an important role in future resources exploitation.Factors such as reservoir heterogeneity and adverse oil/steam mobility ratio have led to severe steam channeling and fingering,thereby reduced conformance efficiency and affected de-velopment response.Therefore,the research on profile control and water shut-off agents becomes increasingly important for thermal recovery wells.The requirements on the performances of profile control and water shut-off agents are discussed in conjunction with the physical properties of heavy oil reservoirs and the technical conditions of steam injection in China.Based on the mechanism of action,research progress and application status,5 agents are summarized including polymer gel,solid particles plugging agent,foam,water-in-oil emulsion and salt precipitation.Problems in each agent are mentioned,and optimization solutions are put for-ward.At last,the development trend of future profile control and water shut-off agents is put forward,i.e.synthesizing agents of low cost and high-temperature resistance,intensifying mechanism research,developing composite system,and researching on new technologies that are less harmful and environmental friendly.展开更多
文摘本研究以温州芜菁(Brassica rapa L. em. Matzg.,2n=20,AA)为母本,水果紫苤蓝(B. oleracea L. var. caulorapa DC,2n=18,CC)为父本进行远缘杂交,创造种间杂种。通过花期剥蕾授粉、子房培养共获得2株杂种,经扩繁得到无性苗19株,经形态学分析、细胞学观察和RAPD分子鉴定出2株均为温州芜菁×紫苤蓝的真杂种,后利用染色体加倍获得异源四倍体新型芜菁甘蓝新种质材料(AACC,2n=38)。两杂种株系出现茎色分离,根部与茎部均有膨大,但程度低于亲本。异源四倍体的花器官较大,花药发育正常,可育花粉率高。本研究所创制的异源四倍体新种质,在一定程度上拓展了芸薹属蔬菜种质资源的遗传基础。
文摘Heavy oil will play an important role in future resources exploitation.Factors such as reservoir heterogeneity and adverse oil/steam mobility ratio have led to severe steam channeling and fingering,thereby reduced conformance efficiency and affected de-velopment response.Therefore,the research on profile control and water shut-off agents becomes increasingly important for thermal recovery wells.The requirements on the performances of profile control and water shut-off agents are discussed in conjunction with the physical properties of heavy oil reservoirs and the technical conditions of steam injection in China.Based on the mechanism of action,research progress and application status,5 agents are summarized including polymer gel,solid particles plugging agent,foam,water-in-oil emulsion and salt precipitation.Problems in each agent are mentioned,and optimization solutions are put for-ward.At last,the development trend of future profile control and water shut-off agents is put forward,i.e.synthesizing agents of low cost and high-temperature resistance,intensifying mechanism research,developing composite system,and researching on new technologies that are less harmful and environmental friendly.
