马尾松种子园优良家系选择研究

Reselection of Fine Families of Pinus massoniana

对6年生马尾松种子园自由授粉家系子代测定,结果表明:种子园子代林材积、胸径、树高3个性状生长量明显大于对照的当地商品种.材积性状比对照增长40%,平均遗传增益达27%,最高家系材积增长率为126%,遗传增益达86%;胸径性状比对照增长17.8%,平均遗传增益15%,最高遗传增益38%;树高性状比对照增长6.1%,平均遗传增益5%,最高遗传增益16%.筛选出一批生长性状优良家系,可为新建的马尾松种子园提供选择材料,同时为现有种子园的去劣疏伐提供科学依据.

According to the investigation of Pinus massoniana of 6 years old which is openpollinated family living in the seed garden,the results show that the volume,diameter and height of the filial generation forests increases clearly comparised with contral speciesThe volume increases by 40%,the average genetic gain is 27%,and the highest increase of volume is 126%,genetic gain reaches 86%The diameter increases by 178%,the average genetic gain is 15%,and the highest genetic gain is 38% The height increases by 61%,the average genetic gain is 5%,and the highest genetic gain is 16%Some firstclass families selecting from these testing breeds can be chosen to be the seeds of Pinus massoniana seed gardens