Temperature Effects on Fertility of Rice TGMS Line Between 96-5-2S with Double Low Critical Temperature Values and Peiai 64S Fertility Photo-Thermo Characteristics in PTGMS Rice C815S and Its Homologous Plant Lines Vertical distribution of algae in semi-desert soil of Shapotou area,Ningxia Hui Autonomous Region Pedigree Analysis of Photoperiod-thermo Sensitive Genic Male Sterile Rice