Geographic variation in growth and wood traits of Neolamarckia cadamba in China  

作　　者：Qingmin Que Kunxi Ouyang Chunmei Li Buye Li Huiyun Song Pei Li Ruiqi Pian Huaqing Li Xiaoyang Chen Changcao Peng 

机构地区：[1]College of Forestry and Landscape Architecture,Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm,South China Agricultural University,Wushan Road 483,Tianhe District,Guangzhou 510642,P.R.China [2]China Forestry Group Leizhou Forestry Bureau Co.,Ltd.,Zhanjiang 524348,Guangdong,P.R.China [3]State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources,South China Agricultural University,Wushan Road 483,Tianhe District,Guangzhou 510642,P.R.China

出　　处：《Forestry Research》2022年第1期121-131,共11页林学研究（英文）

基　　金：supported by the Forestry Science and Technology Innovation Project in Guangdong Province(No.2019KJCX001);the National Natural Science Foundation of China(No.31600525);the Science and Technology Program of Guangdong,China(No.2017B020201008);the Extension and Demonstration Project of Forest Science and Technology from China State Financial Budget(No.(2018)GDTK-08);the Science and Technology Program of Guangzhou(No.201904020014);the 2018 Big Pig-producing County Reward Funds(Research and promotion of key technologies for healthy feeding of pigs and resource utilization of manure pollution)。

摘　　要：Neolamarckia cadamba is an indigenous,timber-producing tree species in Southern China that plays an important role in the sustainable development of the local forestry industry.However,the geographic genetic variation across its natural distribution area in Southern China has yet to be characterized for best utilization.Here,we report the geographic genetic variation in growth and wood properties of N.cadamba from 10 provenances that represent the entire natural distribution of N.cadamba in Southern China.There was significant geographic variation in diameter breast height(DBH),height(H),volume(V),vessel length(VL),vessel diameter(VD),VL/VD,and wood basic density(WBD).The variation in tree volume across provenances was greater than that of other growth traits,indicating that volume has a greater potential for selection in provenance trials.The provenance heritabilities of growth traits and wood properties ranged from 0.59 to 0.67 and from 0.40 to 0.45,respectively.Trend surface analysis revealed that patterns of geographic variation associated with growth traits were weakly negatively correlated with those of wood properties.The pattern of geographic variation in growth traits showed a gradual increase from the periphery to the central region,whereas wood properties showed the opposite pattern,and latitude had the greatest effect on both.Wood property measurements suggested that the YNMS provenance produced superior timber wood,whereas the GXLZ,GXFCG,and GXNN provenances produced the best pulpwood.These provenances could potentially provide more valuable breeding materials for the genetic improvement of N.cadamba.

关 键 词：BREEDING TRAITS PATTERN 

分 类 号：S791[农业科学—林木遗传育种]