1. Institute of Basic Sciences, Technology and Innovation, Pan African University, Nairobi, Kenya;
2. Institute of Biotechnology Research, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya;
3. Coffee Research Foundation, Ruiru, Kenya;
4. Faculty Agronomic Sciences, Laboratory of Applied Ecology, University of Abomey-Calavi, Cotonou, Benin