Abstract
A total of 59 Solanum tuberosum androgenetic plants have been obtained through anther culture, 47 of which derived from a tetraploid clone, seven from a diploid hybrid, and five from an anther-derived clone. About two thirds of the anther-derived plants were dihaploids, a few were monohaploids (5.08%) or aneuploids (6.78%), whereas the tetraploid genotype generated about a third of tetraploids. Seven hundred twenty seven R1 plants arisen from tubers of the androgenetic potatoes were mechanically inoculated with the necrotic strain of the potato Y potyvirus (PVYN) and grown in a glasshouse. Fifty days after inoculation, the presence of PVYN in R1 plants was detected by DAS-ELISA (Double Autibody Sandwich). Only three plants (0.4%) of genotype H2-258 exhibited local necrotic symptoms (hypersensitivity reaction) suggesting the presence of the N y gene, and this extreme resistance is epistatic to hypersensitive resistance. The immunity (R y-gene) to PVYN was retained through anther culturing and present at all levels of ploidy. The pattern of segregation for immunity was differentiated according to the ploidy level of the anther-derived plants. This changed segregation pattern may be due to a loss of resistance during the culturing, when an endoreduplication has taken place or to the possible regeneration from Second-division restituted unreduced microspores. Anyway, this segregation pattern must be taken into account when gametoclones are used in genetic studies.
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Abbreviations
- DAS:
-
double antibody sandwich
- MS:
-
Murashighe and Skoog nutrient medium
- PVYN :
-
necrotic strain of potato Y potyvirus
- SDR:
-
second-division restitution
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Published in Russian in Fiziologiya Rastenii, 2007, Vol. 54, No. 4, pp. 572–578.
The text was submitted by the authors in English.
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Grammatikaki, G., Avgelis, A. & Sonnino, A. Behavior of potato gametoclonal plants against the necrotic strain of potato Y potyvirus. Russ J Plant Physiol 54, 507–512 (2007). https://doi.org/10.1134/S1021443707040115
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DOI: https://doi.org/10.1134/S1021443707040115