Genetic analysis of growth and wood variations in Leucaena leucocephala (Lam.) de Wit.

作     者：E K. Pande A. Kumar S. Ravichandran S. Naithani V. Kothiyal E B. K. Kishore A. Raturi E Gautam S. Dobhal S. Sharma 

作者机构：Forest Research Institute EO. IPE Dehradun 248195 India. Directorate of Rice Research Hyderabad India. Osmania University Hyderabad India 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2013年第24卷第3期

页      面：485-493页

核心收录：

学科分类：0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 0901[农学-作物学] 

基　　金：the group working under CSIR-NIMTLI New Delhi for financial and other necessary supports to the project entitled ‘Biotechnological approaches forimprovement of plant species with especial reference to pulp andpaper’ 

主　　题：Leucaena leucocephala wood parameters heritability ge-netic advance seed orchards 

摘      要：We selected 28 populations of Leucaena leucocephala from different geographical locations in the states of Andhra Pradesh, Tamil Nadu and Orissa of India on the basis of height and girth at breast height （GBH）. We evaluated fiber length, optical density, wall thickness, vessel element length, vessel element diameter, specific gravity and lignin of these populations of L. leucocephala in different sites. Populations had significant variations for all growth, wood and paper parameters. Girth at breast height （GBH） and specific gravity were the most important pa- rameters for heritability and genetic gain, respectively. The minimum heritability was reported for vessel element length and genetic gain for fiber length. The populations were grouped into six clusters, cluster II had maximum number of populations （14） and clusters IV and VI had one population each. GBH contributed maximum of 34.39 % towards total divergence followed by specific gravity （14.02%）. An economic technique to produce quality seed by establishing seed orchards with genetically divergent parents was suggested. The hybridization among the populations selected from diverse clusters could produce greater heterosis needed for higher growth and suitable wood and paper manu- facturing parameters.