Abstract

• The studied ten Pisum sativum L. cultivars were commercially cultivated all over in various part of North Western Myanmar. They were grown abundantly in Kalay, Kalay-wa Township in Sagaing Region. The spore- tetrad and pollen fertility of ten Pisum sativum L. cultivars showed micronuclei per spore tetrad is less than 3 mean micronuclei per spore tetrad. The pollens normality have more than 69 % in all the cultivars and lines. These ten cultivars showed the percentage of normal pollen was greater than abnormal pollen. Thus, to improve their fertility and yield characters, it is essentially needed to understand pollen mother cell cycle that produces pollen and spore- tetrad.