To expand crop planting areas,reestablishment of crop latitude adaptation based on genetic variation in photoperiodic genes can be performed,but it is quite time consuming.By contrast,a crop variety that already exhib...To expand crop planting areas,reestablishment of crop latitude adaptation based on genetic variation in photoperiodic genes can be performed,but it is quite time consuming.By contrast,a crop variety that already exhibits multi-latitude adaptation has the potential to increase its planting areas to be more widely and quickly available.However,the importance and potential of multi-latitude adaptation of crop varieties have not been systematically described.Here,combining daylength-sensing data with the cropping system of elite rice and maize varieties,we found that varieties with gradual daylength sensing coupled with optimum cropping modes have an enhanced capacity for multi-latitude adaptation in China.Furthermore,this multi-latitude adaptation expanded their planting areas and indirectly improved China’s nationwide rice and maize unit yield.Thus,coupling the daylength-sensing process with optimum cropping modes to enhance latitude adaptability of excellent varieties represents an exciting approach for deploying crop varieties with the potential to expand their planting areas and quickly improve nationwide crop unit yield in developing countries.展开更多
Utilization of a two-line breeding system via photoperiod-thermo sensitive male sterility has a great potential for hybrid production in wheat(Triticum aestivum L.).337S is a novel wheat male sterile line sensitive to...Utilization of a two-line breeding system via photoperiod-thermo sensitive male sterility has a great potential for hybrid production in wheat(Triticum aestivum L.).337S is a novel wheat male sterile line sensitive to both short daylength/low temperature and long daylength/high temperature.Five F2 populations derived from the crosses between 337S and five common wheat varieties were developed for genetic analysis.All F1's were highly fertile while segregation occurred in the F2 populations with a ratio of 3 fertile:1 sterile under short daylength/low temperature.It is shown that male sterility in 337S was controlled by a single recessive gene,temporarily designated as wptms3.Bulked segregant analysis(BSA) coupled with simple sequence repeat(SSR) markers was applied to map the sterile gene using one mapping population.The wptms3 gene was mapped to chromosome arm 1BS and flanked by Xgwm413 and Xgwm182 at a genetic distance of 3.2 and 23.5 cM,respectively.The accuracy and efficiency of marker-assisted selection were evaluated and proved essential for identifying homozygous recessive male sterile genotypes of the wptms3 gene in F2 generation.展开更多
基金supported by the National Science Foundation of Fujian Province of China(no.2022J02004)the Open Research Fund of State Key Laboratory of Hybrid Rice(Hunan Hybrid Rice Research Center).
文摘To expand crop planting areas,reestablishment of crop latitude adaptation based on genetic variation in photoperiodic genes can be performed,but it is quite time consuming.By contrast,a crop variety that already exhibits multi-latitude adaptation has the potential to increase its planting areas to be more widely and quickly available.However,the importance and potential of multi-latitude adaptation of crop varieties have not been systematically described.Here,combining daylength-sensing data with the cropping system of elite rice and maize varieties,we found that varieties with gradual daylength sensing coupled with optimum cropping modes have an enhanced capacity for multi-latitude adaptation in China.Furthermore,this multi-latitude adaptation expanded their planting areas and indirectly improved China’s nationwide rice and maize unit yield.Thus,coupling the daylength-sensing process with optimum cropping modes to enhance latitude adaptability of excellent varieties represents an exciting approach for deploying crop varieties with the potential to expand their planting areas and quickly improve nationwide crop unit yield in developing countries.
基金supported by the National Basic Research Program (973) of China (Nos. 2007CB109006 and 2009CB118304)the National High-Tech R&D Program (863) of China (No. 2009AA101102)the National Natural Science Foundation of China (Nos. 30671291 and 30971777)
文摘Utilization of a two-line breeding system via photoperiod-thermo sensitive male sterility has a great potential for hybrid production in wheat(Triticum aestivum L.).337S is a novel wheat male sterile line sensitive to both short daylength/low temperature and long daylength/high temperature.Five F2 populations derived from the crosses between 337S and five common wheat varieties were developed for genetic analysis.All F1's were highly fertile while segregation occurred in the F2 populations with a ratio of 3 fertile:1 sterile under short daylength/low temperature.It is shown that male sterility in 337S was controlled by a single recessive gene,temporarily designated as wptms3.Bulked segregant analysis(BSA) coupled with simple sequence repeat(SSR) markers was applied to map the sterile gene using one mapping population.The wptms3 gene was mapped to chromosome arm 1BS and flanked by Xgwm413 and Xgwm182 at a genetic distance of 3.2 and 23.5 cM,respectively.The accuracy and efficiency of marker-assisted selection were evaluated and proved essential for identifying homozygous recessive male sterile genotypes of the wptms3 gene in F2 generation.
