杉木第2代种子园自由授粉子代测定与选择

对福建省洋口国有林场12年生杉木第2代子代测定林的主要生长性状值进行调查分析,结果表明:参试的各家系在树高、胸径、材积性状间的差异均达到极显著水平。以材积性状作为主要指标,同时兼顾树高、胸径指标,对参试家系进行选择,选出表现最好的30个家系,12年生时平均树高、胸径、单株材积分别为12.61 m、16.76 cm、0.16000 m3,遗传增益分别为2.95%、5.55%、14.24%,平均现实遗传增益为31.78%,这些优良家系适合在福建省顺昌县境内及周边Ⅱ类立地条件下推广应用。

Test and Selection of Open-Pollinated Progenies from 2nd-Generation Chinese fir Second Seed Orchard

The 12-year-old 2nd-generation seed orchard open-pollinated progeny test of Chinese fir were investigated and analysed at Yangkou National Forest Farm of Fujian.The results showed that there were very significant differences among families in tree height,DBH and stem volume.Taking the wood volume characters as the main index,together with the tree height and DBH,30 superior families with good performance in growth were selected,their average value of tree height,DBH and stem volume were 12.61 m,16.76 cm and 0.16000 m3 respectively,their genetic gain were 2.95%,5.55%and 14.24% respectively,and their realized genetic gain were up to 31.78%.These superior families were very suitable to be deployed in the area of Shunchang,Fujian Province.