A COMPARISON BETWEEN SOMACLONAL VARIATION AND INDUCED MUTAGENESIS IN TISSUE CULTURE OF SUNFLOWER LINE Z-8-A (Helianthus annuus L.) / COMPARAISON ENTRE LA VARIATION SOMACLONÉE ET LA MUTAGÉNJÈSE DANS LA CULTURE DE TISSU DE LA LIGNE Z-8-A DE TOURNESOL (Helianthus annuus L.)
2014
Encheva, Julia | Tsvetkova, Fota | Ivanov, Peter
Immature zygotic embryos from the Spanish self-pollinated sunflower line Z-8-A (Helianthus annus L.) were used as donor material to induce direct organogenesis. A portion of the isolated immature embryos were treated with gamma radiation (¹³⁷Cs) at a dose of 5 Gy before plating. The range of the spontaneously induced somaclonal variation among the obtained regenerants was investigated and compared with that of the variants induced through irradiation. The genetic changes occurring during the regeneration procedure included sixteen morphological and biochemical characters. The most significant changes were observed for the following characters: plant height, number of leaves, stem diameter, head diameter, length of branches, oil content in seed (%) and 1000-seed weight.The study showed that the somaclonal- (R₉) and the radiation-induced (M₉R₉) variants revealed similar spectra of morphological and biochemical changes, thought with different frequency.
显示更多 [+] 显示较少 [-]