1. Department of Genetics; Forestry and Agricultural Biotechnology Institute (FABI); University of Pretoria; Pretoria 0002 South Africa
2. Department of Botany and Zoology; Faculty of Science; Masaryk University; Kotlářská 2 Brno 61137 Czech Republic
3. Department of Microbiology and Plant Pathology; Forestry and Agricultural Biotechnology Institute (FABI); University of Pretoria; Pretoria 0002 South Africa
4. División de Ciencias Forestales; Universidad Autónoma Chapingo; Km 38.5 Carretera México-Texcoco Chapingo Estado de México México