Seed Development and Maturation on Seed Quality of Upland Rice cv. Dawk Pa-yawm

摘要: Poor seed quality is a major problem of upland rice production in southern Thailand. The maximum should be harvested at physiological maturity. objectives this paper were to study the changes morphological and traits during development maturation relate color appearance cv. Dawk Pa-yawm. experiment was conducted Department Plant Science, Faculty Natural Resources, Prince Songkla University, Hat Yai campus, Yai, Songkhla, Thailand from August 2014 January 2015. Upland planted field panicles tagged indicate date flowering. 8, 12, 16, 20, 24, 28, 32, 36 days after flowering investigate quality. results showed that reached maturity 28 with dry weight, germination vigor terms soil emergence, mean emergence time, seedling growth rate low electrical conductivity. occurred when approximately 85 % seeds panicle turned yellow. This characteristic can used for determine optimum harvesting time