Effects of nighttime temperature increase on the yield of double season rice Comparison of Leaf Ultrastructures of Oryza Plants in China Comparative Assessment of SSR Allelic Diversity in Wild and Cultivated Rice in China Coordination between Source and Sink in Super Early and  Late Rice Investigation of Utilization and Conservation on HE Rice (O. Sativa L.) Germplasm at Dong Villages of Liping in Guizhou