Semi-dwarfing improves the lodging resistance and yield of rice,and the vast majority of modern rice varieties harbor the sd1 allele to decrease plant height,resulting in reduced genetic diversity and negative agronom...Semi-dwarfing improves the lodging resistance and yield of rice,and the vast majority of modern rice varieties harbor the sd1 allele to decrease plant height,resulting in reduced genetic diversity and negative agronomic traits.Thus,exploring alternative sources of dwarfism is imperative for rice breeding.Here,we identified a novel RGA1 allele,d1-w,from a local indica variety Xiaolixiang(XLX)using a map-based cloning approach.Compared with other rice varieties,RGA1 in XLX contained a unique single nucleotide polymorphism that resulted in an additional transcript and reduced functional RGA1 transcript level.The RGA1 from Nipponbare was introduced into XLX to estimate the value of d1-w in rice breeding.Compared with transgenic XLX plants(XLX^(D1)),XLX exhibited reduced plant height,increased stem strength,lower reactive oxygen species accumulation,delayed senescence,stronger photosynthesis,higher grain yield and quality(including external,milling and nutritional qualities),and enhanced resistance to drought and Rhizoctonia solani.Therefore,we proposed that the d1-w allele has potential as an excellent dwarfism resource for rice breeding.展开更多
基于Design of Experiment(DOE)试验测温数据,采用线性回归分析方法,得到自主开发的水冷式尿素喷嘴6个关键位置的温度回归方程模型。实测温度值和预测温度值差值<5℃,表明模型精度较高。柴油机台架试验结果显示,预测温度误差为-4.4℃...基于Design of Experiment(DOE)试验测温数据,采用线性回归分析方法,得到自主开发的水冷式尿素喷嘴6个关键位置的温度回归方程模型。实测温度值和预测温度值差值<5℃,表明模型精度较高。柴油机台架试验结果显示,预测温度误差为-4.4℃~5.7℃,表明尿素喷嘴温度回归模型可用于实际应用项目的开发预测,可在项目开发前期预测尿素喷嘴内部结晶和过热失效风险。展开更多
基金supported by grants from the National Natural Science Foundation of China (Grant Nos. 31960403 and 31501286)Jiangxi Natural Science Foundation-Outstanding Youth Science Fund Project,China (Grant No. 20212ACB215003)
文摘Semi-dwarfing improves the lodging resistance and yield of rice,and the vast majority of modern rice varieties harbor the sd1 allele to decrease plant height,resulting in reduced genetic diversity and negative agronomic traits.Thus,exploring alternative sources of dwarfism is imperative for rice breeding.Here,we identified a novel RGA1 allele,d1-w,from a local indica variety Xiaolixiang(XLX)using a map-based cloning approach.Compared with other rice varieties,RGA1 in XLX contained a unique single nucleotide polymorphism that resulted in an additional transcript and reduced functional RGA1 transcript level.The RGA1 from Nipponbare was introduced into XLX to estimate the value of d1-w in rice breeding.Compared with transgenic XLX plants(XLX^(D1)),XLX exhibited reduced plant height,increased stem strength,lower reactive oxygen species accumulation,delayed senescence,stronger photosynthesis,higher grain yield and quality(including external,milling and nutritional qualities),and enhanced resistance to drought and Rhizoctonia solani.Therefore,we proposed that the d1-w allele has potential as an excellent dwarfism resource for rice breeding.
文摘基于Design of Experiment(DOE)试验测温数据,采用线性回归分析方法,得到自主开发的水冷式尿素喷嘴6个关键位置的温度回归方程模型。实测温度值和预测温度值差值<5℃,表明模型精度较高。柴油机台架试验结果显示,预测温度误差为-4.4℃~5.7℃,表明尿素喷嘴温度回归模型可用于实际应用项目的开发预测,可在项目开发前期预测尿素喷嘴内部结晶和过热失效风险。
