COMPARISON OF FLOWER AND POLLEN CHARACTERISTICS OF DIPLOID AND TETRAPLOID CHINESE JUJUBE (ZIZIPHUS JUJUBE MILL.)
Polyploidy breeding is becoming more popular because of the development of bigger fruits and higher resistance to biotic and abiotic stresses in polyploidy cytotypes. Recently, great progress has been made in polyploidy breeding of the Chinese jujube (Ziziphus jujube Mill.) which previously encountered many obstacles, such as embryo abortion or small flowers. Two autotetraploid cytotypes were obtained through induction of apical buds with colchicine in conjunction with pruning and top-grafting. The objectives of this research were to study flower and pollen characteristics of these autotetraploids. The results showed that compared with the diploid, the tetraploid Lajiaozao had significantly less, but bigger flower buds; fewer, but larger pollen grains; about the same level of pollen viability, and pollen grains having four apertures.
Liu, P. and Liu, M.J. (2011). COMPARISON OF FLOWER AND POLLEN CHARACTERISTICS OF DIPLOID AND TETRAPLOID CHINESE JUJUBE (ZIZIPHUS JUJUBE MILL.). Acta Hortic. 918, 827-831
Chinese jujube (Ziziphus jujube Mill.), flower number, flower size, pollen activity, pollen size, pollen aperture number