Observation and comparison of morphology and chromosome between different ploides of Antirrihinum majus.

Polyploid breeding is very important for flower breeding.By the study on the morphology and ctyology of diploid and tetraploid of Antirrihinum majus,it was proved that polyploid had great advantages and the tremendous organs were reflected by tetraploid plants.Compared with dipoids,plant height,leaf number,flower number,flower diameter,branch number,stoma length and stoma width of tetraploids were 248.2%,185.4%,148.9%,136.9%,136.5%,162.4%,123.3% than those of the dipoids,respectively.In the comparison of pollen grains characteristics,the pollen grains of tetraploid and diploid were global shape,there was no significant difference.Through chromosome identification,the chromosome numbers of diploid and tetraploid were 16 and 32,respectirely.