Cross combinations from six rapeseed cultivars and lines were evaluated under waterlogging stress condition in order to understand the genetic mechanism of waterlogging tolerance of Brassica napus L.and provide reason...Cross combinations from six rapeseed cultivars and lines were evaluated under waterlogging stress condition in order to understand the genetic mechanism of waterlogging tolerance of Brassica napus L.and provide reasonable improvement programs.There were six germination traits investigated on combining ability and heritability using complete diallel crossing method designed for 30 combinations from those six cultivars and lines.The traits included relative root length,stem length,fresh weight per plant,survival rate,electrical conductivity,and vigor index.After flooding treatment,the six traits of parents and F1 were analyzed.The general combining ability（GCA） and special combining ability（SCA） of germination traits were analyzed using Griffing I method.Among 30 cross combinations,the GCA was significantly different among six waterlogging resistance traits.The SCA of these traits was significantly different except the SCA of electrical conductivity.As a representative trait of waterlogging tolerance in rapeseed,relative vigor index had the highest narrow heritability and relatively low broad heritability.The cultivars Zhongshuang 9 and P79 had higher tolerance potential to waterlogging stress.It can be concluded that combining ability and genetic effects of relative vigor index during germination stage could be used to identify the waterlogging tolerance of rapeseed in breeding program.展开更多
A natural mineral, lindgrenite Cu3 （ MoO4 ）2 （ OH）2, was synthesized from a mixture of sodium molybdate, copper sulfate, and morpholine in water under autogenous pressure at 170 ℃. The crystal structure of the mi...A natural mineral, lindgrenite Cu3 （ MoO4 ）2 （ OH）2, was synthesized from a mixture of sodium molybdate, copper sulfate, and morpholine in water under autogenous pressure at 170 ℃. The crystal structure of the mineral was determined and the final refinement for 791 observed reflections with Ⅰ 〉 2σ（Ⅰ） gave R1 = 0. 0205 and wR2 = 0. 0496. The thermal stability of the mineral was investigated by using TG-DTA and variable-temperature in situ X-ray diffraction（XRD） techniques. The crystalline Cu3Mo2O9 was obtained when the mineral underwent thermal dehydration at a temperature ranging from 300 to 400 ℃, and the mixture of MoO3 and CuO was formed through decomposition of Cu3Mo2O9 at a temperature ranging from 650 to 700 ℃. Therefore, the structure of the mineral was thermally unstable at above 300 ℃, suggesting that Lindgrenite was likely formed via the hydrothermal route occurring in the nature.展开更多
目的:探讨弥漫性慢性鼻窦炎伴鼻息肉(chronic rhinosinusitis with nasal polyps,CRSwNP)患者的临床特征与初次鼻内镜术后嗅觉预后的关系,建立并验证弥漫性CRSwNP患者初次鼻内镜术后嗅觉改善不佳的列线图预测模型。方法:收集并分析于南...目的:探讨弥漫性慢性鼻窦炎伴鼻息肉(chronic rhinosinusitis with nasal polyps,CRSwNP)患者的临床特征与初次鼻内镜术后嗅觉预后的关系,建立并验证弥漫性CRSwNP患者初次鼻内镜术后嗅觉改善不佳的列线图预测模型。方法:收集并分析于南京医科大学第一附属医院耳鼻咽喉科行初次鼻内镜手术治疗的67例弥漫性CRSwNP嗅觉障碍患者的临床资料,根据术后嗅觉改善情况分为嗅觉改善组(50例)和嗅觉未改善组(17例),通过单因素和多因素Logistic回归分析影响嗅觉改善的因素,据此建立弥漫性CRSwNP患者初次鼻内镜术后嗅觉预后的列线图模型并评估其预测效果。结果:多因素分析结果提示病程长短(β=0.527,OR=1.693,95%CI:1.139~2.517)、Lund-Mackay鼻窦CT评分(β=0.704,OR=2.021,95%CI:1.208~3.382)、外周血嗜酸性粒细胞比值(β=0.311,OR=1.365,95%CI:1.026~1.815)、筛窦与上颌窦CT评分的比值(β=0.954,OR=2.597,95%CI:1.263~5.340)是弥漫性CRSwNP初次鼻内镜术后嗅觉改善不佳的独立预测因素,据此构建的列线图模型预测弥漫性CRSwNP初次鼻内镜术后嗅觉改善的受试者工作特征(reciever operating characteristic,ROC)曲线的曲线下面积(area under curve,AUC)为0.770(95%CI:0.658~0.881,P<0.01),C指数为0.856(0.817~0.894),校准曲线的绝对误差平均为0.034。结论:根据病程、Lund-Mackay鼻窦CT评分、外周血嗜酸性粒细胞比值、筛窦与上颌窦CT评分的比值构建的列线图模型可以预测弥漫性CRSwNP患者初次鼻内镜术后的嗅觉改善情况,对临床工作有一定的指导作用。展开更多
基金supported by the National High-Tech Research and Development Program of China (863 Program,2006AA10Z1C2)the Key Technologies R&D Program of China during the 10th Five-Year Plan period (2009BADA8B01,2110BAD01B09)the Natural Science Foundation of Hubei Province,China(2009CDA089)
文摘Cross combinations from six rapeseed cultivars and lines were evaluated under waterlogging stress condition in order to understand the genetic mechanism of waterlogging tolerance of Brassica napus L.and provide reasonable improvement programs.There were six germination traits investigated on combining ability and heritability using complete diallel crossing method designed for 30 combinations from those six cultivars and lines.The traits included relative root length,stem length,fresh weight per plant,survival rate,electrical conductivity,and vigor index.After flooding treatment,the six traits of parents and F1 were analyzed.The general combining ability（GCA） and special combining ability（SCA） of germination traits were analyzed using Griffing I method.Among 30 cross combinations,the GCA was significantly different among six waterlogging resistance traits.The SCA of these traits was significantly different except the SCA of electrical conductivity.As a representative trait of waterlogging tolerance in rapeseed,relative vigor index had the highest narrow heritability and relatively low broad heritability.The cultivars Zhongshuang 9 and P79 had higher tolerance potential to waterlogging stress.It can be concluded that combining ability and genetic effects of relative vigor index during germination stage could be used to identify the waterlogging tolerance of rapeseed in breeding program.
基金Supported by the National Natural Science Foundation of China(No. 20371013, 20421303),National Key Basic ResearchProgram of China(No. 2003CB615807) the State Key Laboratory Base of Novel Functional Materials and Preparation Science(Ningbo University).
文摘A natural mineral, lindgrenite Cu3 （ MoO4 ）2 （ OH）2, was synthesized from a mixture of sodium molybdate, copper sulfate, and morpholine in water under autogenous pressure at 170 ℃. The crystal structure of the mineral was determined and the final refinement for 791 observed reflections with Ⅰ 〉 2σ（Ⅰ） gave R1 = 0. 0205 and wR2 = 0. 0496. The thermal stability of the mineral was investigated by using TG-DTA and variable-temperature in situ X-ray diffraction（XRD） techniques. The crystalline Cu3Mo2O9 was obtained when the mineral underwent thermal dehydration at a temperature ranging from 300 to 400 ℃, and the mixture of MoO3 and CuO was formed through decomposition of Cu3Mo2O9 at a temperature ranging from 650 to 700 ℃. Therefore, the structure of the mineral was thermally unstable at above 300 ℃, suggesting that Lindgrenite was likely formed via the hydrothermal route occurring in the nature.
文摘目的:探讨弥漫性慢性鼻窦炎伴鼻息肉(chronic rhinosinusitis with nasal polyps,CRSwNP)患者的临床特征与初次鼻内镜术后嗅觉预后的关系,建立并验证弥漫性CRSwNP患者初次鼻内镜术后嗅觉改善不佳的列线图预测模型。方法:收集并分析于南京医科大学第一附属医院耳鼻咽喉科行初次鼻内镜手术治疗的67例弥漫性CRSwNP嗅觉障碍患者的临床资料,根据术后嗅觉改善情况分为嗅觉改善组(50例)和嗅觉未改善组(17例),通过单因素和多因素Logistic回归分析影响嗅觉改善的因素,据此建立弥漫性CRSwNP患者初次鼻内镜术后嗅觉预后的列线图模型并评估其预测效果。结果:多因素分析结果提示病程长短(β=0.527,OR=1.693,95%CI:1.139~2.517)、Lund-Mackay鼻窦CT评分(β=0.704,OR=2.021,95%CI:1.208~3.382)、外周血嗜酸性粒细胞比值(β=0.311,OR=1.365,95%CI:1.026~1.815)、筛窦与上颌窦CT评分的比值(β=0.954,OR=2.597,95%CI:1.263~5.340)是弥漫性CRSwNP初次鼻内镜术后嗅觉改善不佳的独立预测因素,据此构建的列线图模型预测弥漫性CRSwNP初次鼻内镜术后嗅觉改善的受试者工作特征(reciever operating characteristic,ROC)曲线的曲线下面积(area under curve,AUC)为0.770(95%CI:0.658~0.881,P<0.01),C指数为0.856(0.817~0.894),校准曲线的绝对误差平均为0.034。结论:根据病程、Lund-Mackay鼻窦CT评分、外周血嗜酸性粒细胞比值、筛窦与上颌窦CT评分的比值构建的列线图模型可以预测弥漫性CRSwNP患者初次鼻内镜术后的嗅觉改善情况,对临床工作有一定的指导作用。
