Using 16-years-old half-sib progenies of Pinus massoniana stand from seed orchard of Jingshan County,Hubei Province as materials,growth factors such as diameter at breast height (DBH),tree height,height under branch,crown diameter and timber volume were measured.Results showed that there were significant differences of growth factors measured among different half-sib progenies,indicating that there were abundant genetic variation among half-sib progenies family and potentials for selection.The heritability of height,DBH and timber volume of 16-years-old Pinus massoniana stand were 0.843 5,0.740 5 and 0.750 6,respectively.According to the heritability value,height,timber volume and DBH could be used as selection indexes.Using 10% as selection ratio,9 superior half-sib progenies families could be selected with genetic gains of height,DBH and timber volume were 13.37%,25.57% and 51.53%,respectively.