摘要
本研究对131个杉木(Cunninghamia lanceolata hook)无性系25年生试验林的生长表现进行分析,以探讨不同无性系生长表现的差异性和估算其遗传潜力增益的递增性;并采用定性和定量分析相结合的方法,以得出优良杉木无性系的生长评价与遗传潜力增益。6a时按优良无性系平均单株立木材积大于CK 30%的标准选出了9个无性系,在15a和25a时,先是按无性系大于CK的比值排序,取前9个无性系进行比较,凡与25a选择相同的无性系认定为优良无性系并得出结论:6a时选准率为44.44%;15a时选准率为77.78%;25a时选准率为100.00%,即"伐期选择结果准确"。优良无性系选择的结果表明:不同无性系之间的生长规律是不同的:有的无性系(如79048)在幼龄期(6a前)生长不是特别突出,但在10a前生长开始加快,在15a时达到优良无性系水平且一直保持稳定到25a;有的无性系(如82014)在幼、中龄期时一直处于优良无性系的边缘,但到25a却名列第2;而有的无性系(如79163)在幼龄期(6a)生长名列前茅、中龄(15a)时仍属优良无性系、但25a时却被排除在优良无性系之外。25a时选取的9个无性系与对照CK相比,其平均树高大于CK15.67%、胸径大于CK 27.31%、立木材积大于CK 84.78%;优良无性系的平均遗传增益△G:H=13.06%;D_(1.3)=23.25%;V=75.75%。
In this study, we analyzed the growth performance of 25-year-old experimental forest of 131 fir（Cunninghamia lanceolata hook） clones to explore the difference in the growth performance of different clones and estimate the increment of genetic potential gain; And we adopted the unified method of qualitative and quantitative analysis to obtain the growth assessment and genetic potential gain of superior fir clones. We selected 9 clones at6 a according to the standard that the average single standing-tree＇s volume was greater than CK 30%, and at 15 a and 25 a, we first ranked the clones on the basis of their ratios that greater than CK and selected the first nine clones to make a comparison. All that which had the same selection with 25 a were considered as the superior clones and a conclusion was drawn that the accuracies of choice at 6a, 15 a, and 25 a were 44.44%, 77.78% and 100.00%,respectively, that was to say ＂the selection result of rotation was accurate＂. The selection results of superior clones showed that the growth rhythms of different clones were different： the growth of some clones（such as 79048） at young stage（before 6a） was not obvious, but they began to grow fast before 10 a and reached the level of superior clones at 15 a and remained stable to 25a; Some clones（such as 82014） was always on the edge of superior clones at young and middle-aged stages, but they ranked the second at 25a; While the growth of some clones（such as 79163）were among the best at young stage（6a） and still belonged to superior clones at middle stage（15a） but were excluded from superior clones at 25 a. The average tree height of 9 clones that selected at 25 a was 15.67% greater than CK, DBH was 27.31% greater than CK and the volume was 84.78% greater than CK when compared with CK. The average genetic gain of superior clones was △G： H=13.06%; D1.3=23.25%; V=75.75%.
作者
赵林峰
高建亮
刘得花
刘飞渡
Zhao Linfeng Gao Jianliang Liu Dehua Liu Feidu(Hunan Polytechnic of Environmant and Biology, Hengyang, 421001 Qiyang County Forestry Bureau, Yongzhou City, Hunan Province, Qiyang, 426191)
出处
《分子植物育种》
CAS
CSCD
北大核心
2017年第7期2755-2761,共7页
Molecular Plant Breeding
基金
湖南省教育厅(17C0564)
湖南省林业厅(98-201)共同资助
关键词
杉木
无性系
生长评价
遗传增益
Chinese fir
Clone
Growth assessment
Genetic gain
