caa a22 4500 445323868 CHVBK 20180317142713.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10681-010-0325-6 doi (NATIONALLICENCE)springer-10.1007/s10681-010-0325-6 Patterns of meiosis in ABDR amphihaploids depend on the specific type of univalent chromosome division [Elektronische Daten] [O. Silkova, A. Shchapova, V. Shumny] Meiosis in wide F1 hybrids in the tribe Triticeae is complex and irregular. Despite extensive research, the meiotic pathways in such hybrids remain largely unknown. In this study, the effect of the genotypes of disomic wheat-rye substitution lines on the regulation of meiosis in ABDR amphihaploids was analysed by comparing microsporogenesis and seed set under self pollination in hybrids of normal bread wheat (Triticum aestivum L.) and wheats with single chromosome substitutions 1R(1A), 1Rv(1A), 2R(2D)1, 2R(2D)2, 2R(2D)3, 5R(5D), 5R(5A), 6R(6A) with rye (Secale cereale L.). Three types of meiotic pathways were identified in the hybrids: reductional, equational, and equational+reductional. During the reductional type division, chromosomes randomly moved toward the poles at Anaphase I (AI) and separated sister chromatids at AII. Meiosis ended with tetrad formation, and the resulting plants were sterile ((2R(2D)1×R, 2R(2D)2×R). In the equational type division, the chromosomes aligned along the equator at Metaphase I and at AI separated into chromatids that moved toward the poles. This meiotic pathway led to dyad formation and partial fertility (especially in hybrids of 1Rv(1A) and 6R(6A)). In the equational+reductional pathway, some chromosomes divided in an equational manner while others were segregated reductionally within the same microsporocyte and this led to formation of tetrads with groups of uncoiled chromosomes. Comparison of the frequencies of each of the three meiotic pathways in different hybrid combinations suggests differences in contributions of individual chromosomes to the control of the entire meiotic process. Springer Science+Business Media B.V., 2010 Triticum aestivum nationallicence Secale cereale nationallicence Wheat-rye amphihaploids nationallicence Unreduced gametes nationallicence Univalent division nationallicence Meiotic pathways in amphihaploids nationallicence Silkova O. Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Lavrentiev aven. 10, 630090, Novosibirsk, Russia aut Shchapova A. Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Lavrentiev aven. 10, 630090, Novosibirsk, Russia aut Shumny V. Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Lavrentiev aven. 10, 630090, Novosibirsk, Russia aut Euphytica Springer Netherlands 178/3(2011-04-01), 415-426 0014-2336 178:3<415 2011 178 10681 https://doi.org/10.1007/s10681-010-0325-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10681-010-0325-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Silkova O. Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Lavrentiev aven. 10, 630090, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Shchapova A. Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Lavrentiev aven. 10, 630090, Novosibirsk, Russia aut NATIONALLICENCE 700 1- Shumny V. Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, Lavrentiev aven. 10, 630090, Novosibirsk, Russia aut NATIONALLICENCE 773 0- Euphytica Springer Netherlands 178/3(2011-04-01), 415-426 0014-2336 178:3<415 2011 178 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer