摘要
对火炬松Pinus taeda主群体新丰亚群体测定林按材积作配合选择研究,结果表明材积增益高于家系选择.在4/100选择率下相应的材积增益为48.6%和21.8%;在25/100选择率下则为30.3%和11.1%;探讨了六年生时为生产性改良和为育种群体培育而选择的可能性,并提出要真正达到按核心育种系统组建下一代育种群体要求,还有待于亚群体试验林多数林木进入开花结实才能实现.
Test of Xinfeng sub-population of the main growth breeding population of Pinus taeda was assessed for traits. Selection was carried out using tree volume. The results showed that genetic gains of combining selection were higher than that of family selection. Giving the selection rate as 4/100, then the genetic gains for combined selection and family selection were 48.6% and 21.8% respectively. For 25/100 of selection rate, the genetic gains were 30.3% and 11.1% respectively. Possibility of at the age of six years, aimed at improvement for productive deployment and establishment of selection breeding population, was discussed. It raised selection for the establishment of the next generation breeding population that could be realized only when most trees in the test stand of sub-population reach the age of fruiting.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2006年第4期64-68,共5页
Journal of South China Agricultural University
基金
"九五"国家科技攻关专题(95-011-03-18-3)
关键词
火炬松
家系
主群体
亚群体
配合选择
遗传增益
Pinus taeda
family
main population
sub-population
combining selection
genetic gain
