Abstract: The data from date test of high quality rice variety Yunhui 290 in the lower latitude plateau of Yunnan Province was used to analyze the rice quality and key climate factors which influence the rice quality.It was concluded that rice quality was influenced by climate differently.In general,the key period influencing the rice quality was from the 10 days before full heading to 30 days after full heading.Especially the meteorological factors during full heading and 30 days after full heading had biggest influence in rice quality.The key meteorological factors influencing the rice quality were daily mean temperature,sunshine duration,daily range of temperature and precipitation.

Key words: Date test, Date test, Rice quality, Key factor, Lower latitude plateau