title: RNA-seq for lncRNAs of Populus canadensis Zhongliao1 under freeze-thaw stress
design: Treated methods of lncRNA-seq samples: A12 group , ramp to -12.0isothermal 30min. A4 group, ramp to -12.0isothermal 30min, ramp up to 4.0isothermal 30min. CK4 group, ramp to 4.0isothermal 30min. B35 group, ramp to -35.0isothermal 30min. B4 group, ramp to -35.0isothermal 30min, ramp up to 4.0isothermal 30min.