根据菊花生长对光温的反应,设计不同品种、不同单株主杆数、不同定植密度和不同定植日期的试验,构建了以生理辐热积(Physiological product of thermal effectiveness and PAR,PTEP)为尺度的温室多杆切花菊的干物质生产与分配预测模型,...根据菊花生长对光温的反应,设计不同品种、不同单株主杆数、不同定植密度和不同定植日期的试验,构建了以生理辐热积(Physiological product of thermal effectiveness and PAR,PTEP)为尺度的温室多杆切花菊的干物质生产与分配预测模型,并用与建模相独立的试验数据对模型进行了检验。结果表明:随单位面积杆数增加,切花菊的单位面积地上干物质产量增加,单枝切花鲜重减少。所建模型对温室多杆切花菊的单株叶干重、茎干重、花干重和地上部分鲜重的预测值与实际观测值基于1∶1线的决定系数(R2)分别为:0.96、0.95、0.82和0.97,回归估计标准误(RMSE)分别为:0.863、1.005、0.201和10.190g.株-1。模型模拟精度较高,可为温室切花菊栽培密度和保留杆数的优化调控提供理论依据。展开更多
Outcrossing rate is an important determinant of cytoplasmic male sterile(CMS)breeding and hybrid seed production for heterosis in soybean.Parental lines with a high outcrossing rate were screened for backcross breedin...Outcrossing rate is an important determinant of cytoplasmic male sterile(CMS)breeding and hybrid seed production for heterosis in soybean.Parental lines with a high outcrossing rate were screened for backcross breeding to obtain the high outcrossing rate maintenance B-lines and sterile A-lines.Application in production practices will help to increase hybrid soybean production.In this study,JLCMS82B and JLCMS89B were selected as parents for the construction of outcrossing rate segregation populations,and the progeny-array approach(PAA)and glyphosate resistant gene markers were used to determine outcrossing rates.We found that:(1)The outcrossing rate between JLCMS82B and JLCMS89B was significantly different;(2)the outcrossing rate of the F2 segregating populations was a quantitative trait,though whether an additive or epistatic effect exists required analysis with a triple test intersection analysis;(3)agronomic traits correlated with outcrossing rate;outcrossing rate was the highest with plant height of about 84 cm,lower number of plant branches,earlier flowering time,larger angle between the branches and the main stem,and with more divergent plant morphology.Correlation analysis between agronomic traits and outcrossing rate can effectively guide the screening of parents with a high outcrossing rate.展开更多
文摘根据菊花生长对光温的反应,设计不同品种、不同单株主杆数、不同定植密度和不同定植日期的试验,构建了以生理辐热积(Physiological product of thermal effectiveness and PAR,PTEP)为尺度的温室多杆切花菊的干物质生产与分配预测模型,并用与建模相独立的试验数据对模型进行了检验。结果表明:随单位面积杆数增加,切花菊的单位面积地上干物质产量增加,单枝切花鲜重减少。所建模型对温室多杆切花菊的单株叶干重、茎干重、花干重和地上部分鲜重的预测值与实际观测值基于1∶1线的决定系数(R2)分别为:0.96、0.95、0.82和0.97,回归估计标准误(RMSE)分别为:0.863、1.005、0.201和10.190g.株-1。模型模拟精度较高,可为温室切花菊栽培密度和保留杆数的优化调控提供理论依据。
基金supported by the National Natural Science Foundation for Young Scientists of China (31301399)the Major Project for Science and Technology Development of Jilin Province, China (20170201001NY)the Agricultural Science Technology Innovation Project of Jilin Province, China (CXGC2017TD002)
文摘Outcrossing rate is an important determinant of cytoplasmic male sterile(CMS)breeding and hybrid seed production for heterosis in soybean.Parental lines with a high outcrossing rate were screened for backcross breeding to obtain the high outcrossing rate maintenance B-lines and sterile A-lines.Application in production practices will help to increase hybrid soybean production.In this study,JLCMS82B and JLCMS89B were selected as parents for the construction of outcrossing rate segregation populations,and the progeny-array approach(PAA)and glyphosate resistant gene markers were used to determine outcrossing rates.We found that:(1)The outcrossing rate between JLCMS82B and JLCMS89B was significantly different;(2)the outcrossing rate of the F2 segregating populations was a quantitative trait,though whether an additive or epistatic effect exists required analysis with a triple test intersection analysis;(3)agronomic traits correlated with outcrossing rate;outcrossing rate was the highest with plant height of about 84 cm,lower number of plant branches,earlier flowering time,larger angle between the branches and the main stem,and with more divergent plant morphology.Correlation analysis between agronomic traits and outcrossing rate can effectively guide the screening of parents with a high outcrossing rate.
