Abstract
The 2C nuclear DNA amounts in diploid Petunia species are low, ranging from 1·73 to 3·00 picograms. The nuclear dry mass and the total chromosome volume are closely correlated with the nuclear DNA amount. So also is cell size measured in pollen grains. Increase in the total nuclear DNA within the genus is achieved by the addition of equal increments of DNA to all members of the chromosome complement irrespective of their size. It is suggested that the correlations and distribution patterns of DNA changes displayed by the natural species may serve as standards for monitoring and interpreting changes in genetic material which are associated with regeneration from protoplasts and callus.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
