Chromosome pairing in meiosis of partially fertile wheat/rye hybrids

Silkova, O. G.; Адонина, И. Г.; Krivosheina, E. A.; Shchapova, A. I.; Shumny, V. K.

doi:10.1007/s00497-012-0207-2

Cited by 23 publications

(17 citation statements)

References 21 publications

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“…Hybrids with a high capacity of ploidization, such as that between LDN and Ae. tauschii , show high FDR frequency with restitution nuclei ( Figure 4A ) ( Xu and Joppa 2000 ; Matsuoka and Nasuda 2004 ; Matsuoka et al 2013 ), while wide hybrids with low ploidization capacity, like rye hybrids with T. turgidum or T. aestivum , usually undergo FDR without restitution nuclei ( Silkova et al 2011 , 2013 ; Oleszczuk and Lukaszewski 2014 ). Environmental sensitivity of meiotic restitution in wide hybrids has also been reported ( Ramsey and Schemske 1998 ; Mable 2004 ; Brownfield and Kohler 2011 ; Pécrix et al 2011 ; Mason et al 2011 ).…”

Section: Discussionmentioning

confidence: 99%

“…However, they occur in polyhaploids and intergeneric hybrids involving wheat and the related species, in which asynapsis results from the absence of homologous chromosome ( Jauhar 2003 , 2007 ; Cai et al 2010 ; Silkova et al 2012 ). Asynapsis is the key feature of unreduced gamete formation ( Wang et al 2010 ; Ressurreição et al 2012 ; Silkova et al 2013 ); therefore, it is referred to as "univalent-dependent meiotic nonreduction" ( De Storme and Geelen 2013 ).…”

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confidence: 99%

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QTug.sau-3B Is a Major Quantitative Trait Locus for Wheat Hexaploidization

Hao

Luo

Zeng

et al. 2014

G3 Genes|Genomes|Genetics

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Meiotic nonreduction resulting in unreduced gametes is thought to be the predominant mechanism underlying allopolyploid formation in plants. Until now, however, its genetic base was largely unknown. The allohexaploid crop common wheat (Triticum aestivum L.), which originated from hybrids of T. turgidum L. with Aegilops tauschii Cosson, provides a model to address this issue. Our observations of meiosis in pollen mother cells from T. turgidum×Ae. tauschii hybrids indicated that first division restitution, which exhibited prolonged cell division during meiosis I, was responsible for unreduced gamete formation. A major quantitative trait locus (QTL) for this trait, named QTug.sau-3B, was detected on chromosome 3B in two T. turgidum×Ae. tauschii haploid populations. This QTL is situated between markers Xgwm285 and Xcfp1012 and covered a genetic distance of 1 cM in one population. QTug.sau-3B is a haploid-dependent QTL because it was not detected in doubled haploid populations. Comparative genome analysis indicated that this QTL was close to Ttam-3B, a collinear homolog of tam in wheat. Although the relationship between QTug.sau-3B and Ttam requires further study, high frequencies of unreduced gametes may be related to reduced expression of Ttam in wheat.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

QTug.sau-3B Is a Major Quantitative Trait Locus for Wheat Hexaploidization

Hao

Luo

Zeng

et al. 2014

G3 Genes|Genomes|Genetics

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“…Production of unreduced gametes in wide hybrids by modifications of meiosis has been observed and known for many decades (Karpechenko, 1928; Liljefors, 1936, Liljefors, 2010), but the subject has recently attracted renewed interest. Several restitution pathways have been described, discussed in considerable detail, and named or renamed, in different crops and different contexts (Karpechenko, 1928; Xu and Joppa, 2000; Jauhar, 2007; Cai et al, 2010; Kynast et al, 2012; Silkova et al, 2011a, b, 2013; for review see Ramanna and Jacobsen, 2003). Given the sheer number of detailed studies, it is somewhat surprising that we have learned only recently of unusual chromosome constitutions among newly formed allopolyploids.…”

Section: Discussionmentioning

confidence: 99%

“…The tendency for meiotic restitution appears to be genetically controlled, at least in wheat (Zhang et al, 2007), but it takes place preferentially in the absence of chromosome pairing (Wang et al, 2010; Silkova et al, 2011a, 2013) even though the relationship is not absolute. When designated pairs of homologues were present in a wide hybrid, restitution preferentially occurred in meiocytes where homologues failed to pair (Silkova et al, 2013). A similar relationship between pairing and restitution was observed here, but it is far from clear if it is the presence of one or more bivalents that directs a predisposed cell away from the restitution pathway, or if it is predisposition to the restitution pathway that reduces the chances for homoeologous pairing.…”

Section: Discussionmentioning

confidence: 99%

“…Many variants of meiotic restitution have been described recently in a broad range of wide hybrids (Bretagnolle and Thompson, 1995; Jauhar, 2007; Cai et al, 2010; Kynast et al, 2012; Silkova et al, 2011b, 2013; for review see Ramanna and Jacobsen, 2003). A variant common in wide hybrids of many Triticeae is the first division restitution (FDR) or single division meiosis (SDM).…”

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The origin of unusual chromosome constitutions among newly formed allopolyploids

Oleszczuk

Lukaszewski

2014

American J of Botany

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Heritability of meiotic restitution and fertility restoration in haploid triticale

et al. 2019

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Key messageA single division meiosis mechanism of meiotic restitution is incompletely penetrant but significantly associated with restored fertility in triticale haploids (n = 21, genome formula ABR).AbstractMeiotic restitution, or failure of meiosis to produce gametes with a reduced chromosome number, can lead to the restoration of fertility in allohaploids. Meiotic restitution is of major interest for producing doubled haploids, as haploid plants undergoing meiotic restitution can often form seeds without the need to apply mitosis inhibitors to double chromosome number. We aimed to characterize meiotic restitution in a population of 183 haploids (n = 21, genome formula ABR) derived from an F1 wheat-rye hybrid where one parent was known to carry factors responsible for restoration of fertility in wide-cross haploids. Based on cytological analysis, approximately half of the plants analyzed were characterized by normal meiosis, while half showed at least some cytological evidence of meiotic restitution. However, this mechanism was incompletely penetrant in the population, with no individual plant showing 100% unreduced gamete formation: restitution occurred sectorially within each anther and was not observed in all the anthers of a given plant. Hence, the absence of meiotic restitution could not be confirmed conclusively for any individual plant, confounding this analysis. However, cytological observation of meiotic restitution was significantly associated with seed set, further confirming the role of meiotic restitution in fertility restoration. Our results provide insight into this mechanism of unreduced gamete formation, and provide a basis for future work identifying the genetic factors responsible for this trait.

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Chromosome pairing in meiosis of partially fertile wheat/rye hybrids

Cited by 23 publications

References 21 publications

QTug.sau-3B Is a Major Quantitative Trait Locus for Wheat Hexaploidization

QTug.sau-3B Is a Major Quantitative Trait Locus for Wheat Hexaploidization

The origin of unusual chromosome constitutions among newly formed allopolyploids

Heritability of meiotic restitution and fertility restoration in haploid triticale

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