Cytologic observations of sterility in interspecific F1 hybrid from Leymus chinensis and Leymus cinereus

摘要

Leymus chinensis and Leymus cinereus belong to Leymus genus of Trib triticeais,both are allotetraploid (2n＝ 28) rhizomegrass.Cross between two species is known as Geographically distant and the complement of advantages and disadvantages.But the interspecific F1 hybrid is totally sterile.In order to understand the cytologic mechanism of hybrid F1 sterility and fertility restoration further, In this study, the meiosis of PMCs and the development of pollen and embryo sac of L.chinensis,L.cinereus and their F1 hybrid.were observed.