Study on Flowering, Pollinated Potential and Fertilization of Some Cultivars Thailand Adenium obesum

The characteristics relative to flowering, pollination, fertilization of  some Thai Adenium obesum accessions were investigated at the Faculty of Agronomy, Hanoi University of Agriculture. The results showed that stamens and pistils mature at  48 hrs. and 72 hrs after anthesis, respectively. The pollen viability of different accessions was high, ranging from 90.1±3.9% to 95.7±0.7%. The fruit set of the cross combinations varied from 25 to 100%. The colour characteristics of hybrid fruits were regulated by the  parental species. The fruit color was maternally controlled. The germination rate of Adenium obesum crossed seeds reached from 64% to 90.5%, and 25% to 97.4% of seedlings were obtained.