These families were Yunnan ChangningC9, LonglinL12, Guizhou TaijiangJiao2, Guizhou LeishanGe5, Guizhou Jianhe Ang4, Ang9 and Ang10 whose mean specific gravity and genetic gain were 0.3404g/cm3 and 5.08%.

• 入选家系有7个；分别为昌宁C9、龙陵L12、贵州台江交2、格5、贵州剑河昂4、昂9和昂10；入选家系平均比重为0.；3404g/cm3；遗传增益为5