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New CMS-associated phenotypes in cybrids Nicotiana tabacum L. (+Hyoscyamus niger L.)

Lookup NU author(s): Dr Mikhajlo Zubko


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Morphological characteristics were studied in cytoplasmic male sterile (CMS) cybrids possessing the tobacco nuclear genome, Hyoscyamus niger plastome and recombinant mitochondria. After backcrosses with tobacco, new flower modifications were found, including: conversions of stamens into branched filamentous structures; alterations in the shape of petals and the corolla limb; and high degrees of reduction in most flower organs. Vegetative alterations (leaf elongation and stem branching) occurred in some cybrids. Results confirmed that a protoplast fusion-based alloplasmic cytoplasm transfer, followed by conventional backcrosses, is a useful tool for generating alternative CMS sources with novel nucleo-cytoplasmic compositions. These alterations in the genetic status were accompanied by modified floral and vegetative phenotypes.

Publication metadata

Author(s): Zubko MK; Zubko EI; Adler K; Grimm B; Gleba YY

Publication type: Article

Publication status: Published

Journal: Annals of Botany

Year: 2003

Volume: 92

Issue: 2

Pages: 281-288

ISSN (print): 0305-7364

ISSN (electronic): 1095-8290

Publisher: Oxford University Press