Abstract
1 Key Laboratory of Agro-Microbial Resource and Application, Ministry of Agriculture/College of Biological Sciences, China Agricultural University, Beijing 100094, PR China
2 Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, 11340 México D.F., México
3 The Institute of Agricultural Resources and Regional Planning of Chinese Academy of Agricultural Sciences. Beijing 100081, PR China