Abstract
The DNA 2C and per chromosome values of 57 species belonging to 22 genera of gymnosperms have been analysed. The overall range is 12-fold with a modal value of about 30.0 pg.Cycadales exhibit a 2-fold difference. AmongConiferales with a 4-fold variation, thePinaceae have higher mean DNA contents as well as a greater range and diversity than other families. Remarkable interspecific differences are found inCycas, Picea, Larix, Pinus, Callitris, Cupressus, andChamaecyparis. Despite this, there is a constancy of basikaryotypes within these genera.Gnetum shows a distinctly low DNA value.
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Ohri, D., Khoshoo, T.N. Genome size in gymnosperms. Pl Syst Evol 153, 119–132 (1986). https://doi.org/10.1007/BF00989421
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DOI: https://doi.org/10.1007/BF00989421