Cross Compatibility between Tetra Ploids and Octa Ploids of Dendranthema yoshinaganthum Kitam. and Characteristics of the Progenies

Abstract

Reciprocal crossing between tetraploids and octaploids of Dendranthema yoshinaganthum Kitam. were performed. Tetraploid × tetraploid was compatible, but no seedlings were obtained from octaploid × octaploid. The tetraploid × octaploid was partially compatible. The ploidy level of the progenies was almost intermediate between that of the parents. Some progenies had a larger chromosome number than expected. Male-sterile traits appeared in progenies derived from specific cross combinations between tetraploid and octaploid.