国家重点研发计划项目SQ2016ZY03001818的"水稻杂种优势利用创新技术研究"课题2016YFD0101107;重庆市重点实验室能力提升项目cstc2014pt-sy80001资助.This study was supported by the subject "New Technology of Heterosis Utilization in Rice" 2016YFD0101107 in the National Key Research and Development ProgramSQ2016ZY03001818;Chongqing Key Laboratory Capacity Improvement Projectcstc2014pt-sy80001