Early occurrence of genetic variants in protoplast cultures, [tobacco]

clone clones crops cultivos dicotiledoneas dicotyledons economic plants formas de descendencia forme de descendance genetica genetics methode methods monocarpos ornamentales nicotiana nicotiana tabacum ornamental monocarps ornamental plants plantas plantas estimulantes plantas ornamentales plante plante de culture plante ornementale plante ornementale monocarpique plante stimulante plants progeny forms pure lines solanaceae stimulant crops tubiflorae