Quantitative characteristics of clonal population from Setaria viridis and S. glauca

The quantitative characters and biomass of clonal population of Setaria viridis and S.glauca from recent abandoned cropland were studied. The results indicated that the component quantitative characteristics within each species was significantly different, and both plant species had high phenotypic plasticity. Coefficients of variation in spikes of S.viridis was 123.48% and that in leaves biomass of S.glauca was 84.43% which were highest quantitative characteristics of each, respectively. For the clonal population of S.viridis, both the relationship between total tiller number, reproduction tiller number, total plant height and total biomass and the relationship between each component biomass and total tiller number performed as a positive power function. However, there were linear relationship in the S.glauca clonal population. Both S.viridis and S.glauca population had the highest stem biomass allocation (37.72%, 47.74%) and lower spike biomass allocation(15.04%, 10.82%) .