北京林业大学学报2017，Vol.39Issue(9)：32-40,9.DOI:10.13332/j.1000--1522.20160372
南方低山丘陵区泡桐无性系生长和干形综合选择
Comprehensive selection of growth and stem form of superior paulownia clones in the hilly region of southern China
摘要
Abstract
To address the problem of lacking superior Paulownia spp. clones in the hilly region of southern China, the study was carried out with 5-years-old clonal test plantation contained 24 Paulownia spp. clones. The genetic parameter estimations of 4 growth traits including DBH ( D1. 3 ) , height of the trunk ( Ht ) , total volume( Vt ) and ratio of height of extened trunk to original trunk ( H1/H0 ) , and 2 stem form traits including taper of the trunk (β) and form factor(f) of clones were conducted, and correlations among these traits were analyzed. Furthermore, evaluation and selection of Paulownia spp. clones were conducted by comprehensive selection index method. Results indicated that: significant differences existed in each of the 6 traits among these 24 clones. The repeatability of D1. 3 and Vt were 0. 7273 and 0. 7269, respectively. The repeatability of other four traits was smaller ranging from 0. 2018 to 0. 3837. There were very significantly positive phenotypic and genetic correlations among 4 growth traits, and there were negative phenotypic and genetic correlations between the two form traits (βand f) . There were very significantly negative correlations between form factor and 4 growth traits. Genetic correlations betweenβand D1. 3 , Ht , H1/H0 were significantly positive. Phenotypic correlations between β and D1. 3 , Vt were significantly positive and positive, respectively. With a selection rate of 17%, clones 609, 204, 302 and 207 were selected as the superior clones by the method of comprehensive selection index. Compared with control, genetic and actual gains through these 4 clones were 3. 93% and 5. 40% for D1. 3 , 5. 75% and 16. 75% for Ht , 21. 84% and 30. 04% for Vt , 13. 18% and 34. 35% for H1/H0 , 5. 72% and 28. 34%for β, -0. 45% and -1. 62% for f, respectively.关键词
泡桐/无性系/生长/干形/多性状选择指数Key words
Paulownia spp./clone/growth/stem form/comprehensive selection index分类
农业科技引用本文复制引用
赵阳,乔杰,王保平,冯延芝,周海江,崔令军,王炜炜,杨代贵..南方低山丘陵区泡桐无性系生长和干形综合选择[J].北京林业大学学报,2017,39(9):32-40,9.基金项目
"十二五"国家科技支撑计划课题(2015BAD09B0204)、林业公益性行业科研专项(201204705). （2015BAD09B0204）
