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Sexual reproduction is the default mode in apomictic Hieracium subgenus Pilosella, in which two dominant loci function to enable apomixis
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SYSNO ASEP 0364645 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Sexual reproduction is the default mode in apomictic Hieracium subgenus Pilosella, in which two dominant loci function to enable apomixis Author(s) Koltunow, A. M. G. (AU)
Johnson, S. D. (AU)
Rodrigues, J. C. M. (AU)
Okada, T. (AU)
Hu, Y. (CN)
Tschuchiya, T. (JP)
Wilson, S. (NZ)
Fletcher, P. (NZ)
Ito, K. (JP)
Suzuki, G. (JP)
Mukai, Y. (JP)
Fehrer, Judith (BU-J) RID, ORCID
Bicknell, R. A. (NZ)Number of authors 13 Source Title Plant Journal. - : Wiley - ISSN 0960-7412
Roč. 66, č. 5 (2011), s. 890-902Number of pages 13 s. Language eng - English Country GB - United Kingdom Keywords apomixis ; Hieracium ; apospory Subject RIV EF - Botanics CEZ AV0Z60050516 - BU-J (2005-2011) UT WOS 000290952900015 DOI 10.1111/j.1365-313X.2011.04556.x Annotation Mutants of Hieracium subgen. Pilosella that had lost function in one or both dominant loci controlling apomixis (LOA, LOP) were examined to establish their developmental roles during seed formation. Developmental events leading to the completion of meiotic tetrad formation are required for AI cell formation. Sexual initiation may stimulate activity of the LOA locus, which was required for AI cell formation and subsequent suppression of the sexual pathway. AI cells undergo nuclear division to form embryo sacs, in which LOP functions gametophytically to stimulate fertilization independent embryo and endosperm formation. Loss of function in either locus results in partial reversion to sexual reproduction, and loss of function in both loci results in total reversion to sexual reproduction. Thus, sexual reproduction is the default reproductive mode upon which apomixis is superimposed. These loci may function to recruit the sexual machinery at specific time points to enable apomixis. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2012
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