Crossing of Food Beans (Phaseolus Vulgaris L.): 1. Influence of Environment and Pollination Technique

Abstract

When van Rheenen and Gichuhi (1978) wanted to start a breeding programme at Thika, Kenya, they observed that their crosses were successful for 18 percent only while the percentage of natural pod set was 55. Obviously an improvement here was much desired. A literature review and their first experiences suggested some possible ways of improvement. Main factors reported to be of influence on pod set and the success of crossing are relative humidity, temperature and pollination technique.