枫香优良家系和单株选择研究

通过分析枫香家系和单株间遗传增益的大小 ,进行优良家系和单株的选择 ,结果表明 :家系间差异达到极显著水平。中选优良家系与平均数比较的遗传增益大于与CK比较值 ,以枫香地径和树高为主要选择指标 ,造林后 1a初选家系是 12 9号和 12 4号 ,造林后 3a选出 2 1号和 132号为优良家系。在单株选择中 ,与CK比较的遗传增益值小于与平均数比较值 ,造林后 1a选出的树高优良单株是 12 4号家系第 3株 ,地径优良单株是 12 9号家系第 7株 ;造林后 3a选出的优良单株是 2 1号家系第 7株 ,132号家系第 5株

Studies on the Selections of Liquidambar formosanaFine Families and Individuals

The results show that the difference between Liquidambar formosanafamilies reaches extremely significant level.The genetic gain with the comparison between screened fine family and average number is bigger than that with comparison between screened fine family and CK.Taking L.formosanaground diameter and tree height as major selection objectives,the tentatively screened families are No.129 and No.124 after 1 year of afforestation,No.21 and No.132 are screened as fine families after 3 years of afforestation .In the individual selection,the genetic gain value compared with CK is smaller than that compared with average number .The tree height fine individual screened after 1 year of afforestation is No.3 plant (No.124 family ),the ground diameter fine individual is No.7 plant (No.129 family);the fine individuals screened after 3 years of afforestation are No.7 plant (No.21 family)and No.5 plant(No.132 family).