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Features of the regulation of meiotic restitution in androgenic haploids of wheat-rye substitution lines 2R(2D)1, 2R(2D)3, and 6R(6A) (Triticum aestivum L., cultivar Saratovskaya 29/Secale cereale L., cultivar Onokhoiskaya)

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Abstract

Regulation of meiotic restitution in androgenic haploids generated by cultivation of isolated anthers of three wheat-rye substitution lines 2R(2D)1, 2R(2D)3, and 6R(6A) (Triticum aestivum L., cultivar Saratovskaya 29/Secale cereale L., cultivar Onokhoiskaya) was studied. The presence of rye chromosomes and the absence of homeologous wheat chromosomes in the haploid plant genome was shown to cause meiotic restitution, as observed in the case of androgenic haploids 6R(6A), or to inhibit it—in meiosis of haploids 2R(2D)1 and 2R(2D)3. In haploids of lines 2R(2D)1 and 2R(2D)3, the reductional type of division of univalent chromosomes was observed, leading to preferential formation of tetrads. In haploids of line 6R(6A), the equational type of division of univalents into sister chromatids, resulting in the block of the second division and formation of diads in approximately 50% of cells, was detected. These results confirm data on the effect of the genotype of line 2R(2D)1 on the induction of reductional type division of univalents and two-phase meiosis, which were earlier obtained in studies of meiosis in polyhaploids 2R(2D)1 × S. cereale L., cultivar Onokhoiskaya.

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Authors and Affiliations

  1. Institute of Cytology and Genetics, Russian Academy of Sciences, Siberian Branch, Novosibirsk, 630090, Russia

    O. G. Silkova, O. B. Dobrovolskaya, A. I. Shchapova & V. K. Shumny

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  1. O. G. Silkova
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  2. O. B. Dobrovolskaya
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  3. A. I. Shchapova
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  4. V. K. Shumny
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Correspondence to O. G. Silkova.

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Original Russian Text © O.G. Silkova, O.B. Dobrovolskaya, A.I. Shchapova, V.K. Shumny, 2009, published in Genetika, 2009, Vol. 45, No. 9, pp. 1211–1216.

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Silkova, O.G., Dobrovolskaya, O.B., Shchapova, A.I. et al. Features of the regulation of meiotic restitution in androgenic haploids of wheat-rye substitution lines 2R(2D)1, 2R(2D)3, and 6R(6A) (Triticum aestivum L., cultivar Saratovskaya 29/Secale cereale L., cultivar Onokhoiskaya). Russ J Genet 45, 1062–1066 (2009). https://doi.org/10.1134/S1022795409090063

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  • DOI: https://doi.org/10.1134/S1022795409090063

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