[Yuan, De-Yi; Zou, Feng; Fan, Xiaoming; Zhang, Lin; Lin, Qing] Cent South Univ Forestry & Technol, Key Lab Cultivat & Protect Nonwood Forest Trees, Minist Educ, Changsha 410004, Hunan, Peoples R China.
[Feng, Yanzhi] China Paulownia Res Ctr, Zhengzhou 450003, Henan Province, Peoples R China.
[Zeng, Xiaochun; Cao, Heping] ARS, So Reg Res Ctr, USDA, New Orleans, LA 70124 USA.
[Cao, Heping] ARS, So Reg Res Ctr, USDA, 1100 Robert E Lee Blvd, New Orleans, LA 70124 USA.