Apomixis

Forschungsgebiete

Leitung: Prof. Dr. Timothy F. Sharbel

Wenn im Rahmen der Fortpflanzung durch Samen der Embryo auf asexuelle Weise entsteht, wird dafür der Begriff Apomixis verwendet. 

Die Arbeitsgruppe Apomixis befasste sich anhand von in der Natur vorkommenden Pflanzenpopulationen mit den Ursprüngen und der evolutionären Entwicklung dieser speziellen Art der Fortpflanzung. 

Aus praktischer Sicht wird der Apomixis aufgrund des enormen Nutzens, der für die züchterische Entwicklung von Kulturpflanzen verfügbar werden könnte, das Potenzial für eine landwirtschaftliche Revolution zugesprochen. Aus theoretischer Sicht hingegen wird Apomixis als ein evolutionär instabiler Reproduktionsmodus betrachtet, da dauerhafte Asexualität zu genetischer Vereinheitlichung und zur Anreicherung von Mutationen führen kann. Apomixis (sowie Parthenogenese bei Tieren) hat sich jedoch in vielen Fällen im jeweiligen biogeographischen Kontext als eine außerordentlich erfolgreiche reproduktionsbiologische Strategie erwiesen. 

Unsere wissenschaftlichen Studien sind daher auf die selbst innerhalb von kleineren Populationen apomiktischer Wildarten evidente Variabilität gerichtet, wobei wir verstehen wollen, wie und warum ein Umschalten zwischen Sexualität (Mixis) und Apomixis erfolgt. Darüber hinaus, ist Apomixis sehr häufig mit Polyploidie, Bastardierung und genomischer Instabilität assoziiert, was uns dazu veranlasst, diese Phänomene und insbesondere deren Zusammenhang mit apomiktischen Phänotypen zu untersuchen.

Derzeitig etablieren und nutzen wir zwei Modellsysteme der Apomixisforschung, die beide innerhalb ihrer natürlichen Populationen sowohl sexuelle als auch apomiktische Vertreter umfassen.

Publikationen

Autor
Titel
2022

Mau M, Mandáková T M, Ma X, Ebersbach J, Zou L, Lysak M A, Sharbel T F:

Evolution of an apomixis-specific allele class in supernumerary chromatin of apomictic Boechera. Front. Plant Sci. 13 (2022) 890038. https://dx.doi.org/10.3389/fpls.2022.890038

Paczesniak D, Pellino M, Goertzen R, Guenter D, Jahnke S, Fischbach A, Lovell J T, Sharbel T F:

Seed size, endosperm and germination variation in sexual and apomictic Boechera. Front. Plant Sci. 13 (2022) 991531. https://dx.doi.org/10.3389/fpls.2022.991531

2021

Mau M, Liiving T, Fomenko L, Goertzen R, Paczesniak D, Böttner L, Sharbel T F:

The spread of infectious asexuality through haploid pollen. New Phytol. 230 (2021) 804-820. https://dx.doi.org/10.1111/nph.17174

Otto L-G, Sonnenschein M, Faehnrich B, Franz C, Ruzicka J, Novak J, Fraust B, He S, Himmelbach A, Plocharski B, Bubner U, Albrecht S, Plescher A, Sharbel T:

Entwicklung einer sterilen Kamillensorte zur Erweiterung der Anbaufläche in Deutschland. J. Kulturpfl. 73 (2021) 173-174.

2020

Pellino M, Hojsgaard D, Hörandl E, Sharbel T F:

Chasing the apomictic factors in the Ranunculus auricomus complex: exploring gene expression patterns in microdissected sexual and apomictic ovules. Genes 11 (2020) 728. https://dx.doi.org/10.3390/genes11070728

2019

Duszynska D, Vilhjalmsson B, Castillo Bravo R, Swamidatta S, Juenger T E, Donoghue M T A, Comte A, Nordborg M, Sharbel T F, Brychkova G, McKeown P C, Spillane C:

Transgenerational effects of inter-ploidy cross direction on reproduction and F2 seed development of Arabidopsis thaliana F1 hybrid triploids. Plant Reprod. 32 (2019) 275-289. https://dx.doi.org/10.1007/s00497-019-00369-6

Navarro-Domínguez B, Martín-Peciña M, Ruiz-Ruano F J, Cabrero J, Corral J M, López-León M D, Sharbel T F, Camacho J P M:

Gene expression changes elicited by a parasitic B chromosome in the grasshopper Eyprepocnemis plorans are consistent with its phenotypic effects. Chromosoma 128 (2019) 53-67. https://dx.doi.org/10.1007/s00412-018-00689-y

Rizzo P, Altschmied L, Stark P, Rutten T, Guendel A, Scharfenberg S, Franke K, Baeumlein H, Wessjohann L, Koch M, Borisjuk L, Sharbel T F:

Discovery of key regulators of dark glands development and hypericin biosynthesis in St. Johns wort (Hypericum perforatum). Plant Biotechnol. J. 17 (2019) 2299-2312. https://dx.doi.org/10.1111/pbi.13141

2017

Galla G, Zenoni S, Avesani L, Altschmied L, Rizzo P, Sharbel T F, Barcaccia G:

Pistil transcriptome analysis to disclose genes and gene products related to Aposporous apomixis in Hypericum perforatum L. Front. Plant Sci. 8 (2017) 79. https://dx.doi.org/10.3389/fpls.2017.00079

Lovell J T, Williamson R J, Wright S I, McKay J K, Sharbel T F:

Mutation accumulation in an asexual relative of Arabidopsis. PLoS Genet. 13 (2017) e1006550. https://dx.doi.org/10.1371/journal.pgen.1006550

Milker S:

Untersuchung von männlicher Sterilität und Selbstinkompatibilität bei Matricaria chamomilla L. zur Bestäubungslenkung. (Bachelor Thesis) Jena, Ernst-Abbe-Hochschule Jena, Fachbereich Medizintechnik und Biotechnologie, Studiengang Biotechnologie (2017) 56 pp.

Navarro-Domínguez B, Ruiz-Ruano F J, Cabrero J, Corral J M, López-León M D, Sharbel T F, Camacho J P:

Protein-coding genes in B chromosomes of the grasshopper Eyprepocnemis plorans. Sci. Rep. 7 (2017) 45200. https://dx.doi.org/10.1038/srep45200

Otto L-G, Mondal P, Brassac J, Preiss S, Degenhardt J, He S, Reif J C, Sharbel T F:

Use of genotyping-by-sequencing to determine the genetic structure in the medicinal plant chamomile, and to identify flowering time and alpha-bisabolol associated SNP-loci by genome-wide association mapping. BMC Genomics 18 (2017) 599. https://dx.doi.org/10.1186/s12864-017-3991-0

Šarhanová P, Sharbel T F, Sochor M, Vašut R J, Dančák M, Trávníček B:

Hybridization drives evolution of apomicts in Rubus subgenus Rubus: evidence from microsatellite markers. Ann. Bot. 120 (2017) 317-328. https://dx.doi.org/10.1093/aob/mcx033

Scheriau C L, Nuerk N M, Sharbel T F, Koch M A:

Cryptic gene pools in the Hypericum perforatum - H. maculatum complex: diploid persistence versus trapped polyploid melting. Ann. Bot. 120 (2017) 955-966. https://dx.doi.org/10.1093/aob/mcx110

Tedeschi F, Rizzo P, Rutten T, Altschmied L, Bäumlein H:

RWP-RK domain-containing transcription factors control cell differentiation during female gametophyte development in Arabidopsis. New Phytol. 213 (2017) 1909–1924. https://dx.doi.org/10.1111/nph.14293

2016

Rizzo P:

Novel insights on female gametophyte development in the apomictic model species Boechera spp. and Hypericum spp. (PhD Thesis) Halle/S., Martin-Luther-Universität Halle-Wittenberg, Naturwissenschaftliche Fakultät I Biowissenschaften (2016) 182 pp.

Róis A S, Sadio F, Paulo O S, Teixeira G, Paes A P, Espírito-Santo D, Sharbel T F, Caperta A D:

Phylogeography and modes of reproduction in diploid and tetraploid halophytes of Limonium species (Plumbaginaceae): evidence for a pattern of geographical parthenogenesis. Ann. Bot. 117 (2016) 37-50. https://dx.doi.org/10.1093/aob/mcv138

Valverde J, Gomez J M, Garcia C, Sharbel T F, Jimenez M N, Perfectti F:

Inter-annual maintenance of the fine-scale genetic structure in a biennial plant. Sci. Rep. 6 (2016) 37712. https://dx.doi.org/10.1038/srep37712

2015

Galla G, Vogel H, Sharbel T F, Barcaccia G:

De novo sequencing of the Hypericum perforatum L. flower transcriptome to identify potential genes that are related to plant reproduction sensu lato. BMC Genomics 16 (2015) 254. https://dx.doi.org/10.1186/s12864-015-1439-y

He S, Zhao Y, Mette M F, Bothe R, Ebmeyer E, Sharbel T F, Reif J C, Jiang Y:

Prospects and limits of marker imputation in quantitative genetic studies in European elite wheat (Triticum aestivum L.). BMC Genomics 16 (2015) 168. https://dx.doi.org/10.1186/s12864-015-1366-y

Mandáková T, Sharbel T F, Schranz M E, de Jong H, Lysak M A:

Karyotype evolution in apomictic Boechera and the origin of the aberrant chromosomes. Plant J. 82 (2015) 785-793. https://dx.doi.org/10.1111/tpj.12849

Marques A, Ribeiro T, Neumann P, Macas J, Novák P, Schubert V, Pellino M, Fuchs J, Ma W, Kuhlmann M, Brandt R, Vanzela A L L, Beseda T, Šimková H, Pedrosa-Harand A, Houben A:

Holocentromeres in Rhynchospora are associated with genome-wide centromere-specific repeat arrays interspersed amongst euchromatin. Proc. Natl. Acad. Sci. U.S.A. 112 (2015) 13633–13638. https://dx.doi.org/10.1073/pnas.1512255112

Mau M, Lovell J T, Corral J M, Kiefer C, Koch M A, Aliyu O M, Sharbel T F:

Hybrid apomicts trapped in the ecological niches of their sexual ancestors. Proc. Natl. Acad. Sci. U.S.A. 112 (2015) E2357-E2365. https://dx.doi.org/10.1073/pnas.1423447112

Otto L-G, Junghanns W R, Plescher A, Sonnenschein M, Sharbel T F:

Towards breeding of triploid chamomile (Matricaria recutita L.) – Ploidy variation within German chamomile of various origins. Plant Breed. 134 (2015) 485–493. https://dx.doi.org/10.1111/pbr.12285

Pellino M:

Gene expression analysis and transcriptome evolution in apomixis: A case study in Boechera and Ranunculus. (PhD Thesis) Heidelberg, Ruprecht-Karls-Universität, Fakultäten für Naturwissenschaften und Mathematik (2015) 134 pp.

Raggi L, Bitocchi E, Russi L, Marconi G, Sharbel T F, Veronesi F, Albertini E:

Understanding genetic diversity and population structure of a Poa pratensis worldwide collection through morphological, nuclear and chloroplast diversity analysis. PLoS One 10 (2015) e0124709. https://dx.doi.org/10.1371/journal.pone.0124709

Sochor M, Vašut R J, Sharbel T F, Trávníček B:

How just a few makes a lot: Speciation via reticulation and apomixis on example of European brambles (Rubus subgen. Rubus, Rosaceae). Mol. Phylogenet. Evol. 89 (2015) 13-27. https://dx.doi.org/10.1016/j.ympev.2015.04.007

2014

Demidov D, Lermontova I, Weiss O, Fuchs J, Rutten T, Kumke K, Sharbel T F, van Damme D, de Storme N, Geelen D, Houben A:

Altered expression of Aurora kinases in Arabidopsis results in aneu- and polyploidization. Plant J. 80 (2014) 449-461. https://dx.doi.org/10.1111/tpj.12647

Hojsgaard D, Greilhuber J, Pellino M, Paun O, Sharbel T F, Hörandl E:

Emergence of apospory and bypass of meiosis via apomixis after sexual hybridisation and polyploidisation. New Phytol. 204 (2014) 1000-1012. https://dx.doi.org/10.1111/nph.12954

Lovell J T, Grogan K, Sharbel T F, McKay J K:

Mating system and environmental variation drive patterns of adaptation in Boechera spatifolia (Brassicaceae). Mol. Ecol. 23 (2014) 4486-4497. https://dx.doi.org/10.1111/mec.12879

Neiman M, Sharbel T F, Schwander T:

Genetic causes of transitions from sexual reproduction to asexuality in plants and animals. J. Evol. Biol. 27 (2014) 1346-1359. https://dx.doi.org/10.1111/jeb.12357

Puente Molins M, Corral J M, Aliyu O M, Koch M A, Betzin A, Maron J L, Sharbel T F:

Biogeographic variation in genetic variability, apomixis expression and ploidy of St. Johns wort (Hypericum perforatum) across its native and introduced range. Ann. Bot. 113 (2014) 417-427. https://dx.doi.org/10.1093/aob/mct268

Seeber E, Winterfeld G, Hensen I, Sharbel T F, Durka W, Liu J, Yang Y-P, Wesche K:

Ploidy in the alpine sedge Kobresia pygmaea (Cyperaceae) and related species: combined application of chromosome counts, new microsatellite markers and flow cytometry. Bot. J. Linn. Soc. 176 (2014) 22-35. https://dx.doi.org/10.1111/boj.12189

Sharbel T F, Corral Garcia J:

Improved methods for inducing apomixis in plants. (Patent), Veröffentlichung: 05.06.2014, IPK-Nr. 2012/13. WO 2014/083047 (2014).

2013

Aliyu O M, Seifert M, Corral J M, Fuchs J, Sharbel T F:

Copy number variation in transcriptionally active regions of sexual and apomictic Boechera demonstrates independently-derived apomictic lineages. Plant Cell 25 (2013) 3808-3823. https://dx.doi.org/10.1105/tpc.113.113860

Amiteye S, Corral J M, Vogel H, Kuhlmann M, Mette M F, Sharbel T F:

Novel microRNAs and microsatellite-like small RNAs in sexual and apomictic Boechera species. MicroRNA 2 (2013) 45-62. https://dx.doi.org/10.2174/2211536611302010006

Corral J M, Vogel H, Aliyu O M, Hensel G, Thiel T, Kumlehn J, Sharbel T F:

A conserved apomixis-specific polymorphism is correlated with exclusive exonuclease expression in premeiotic ovules of apomictic Boechera species. Plant Physiol. 163 (2013) 1660-1672. https://dx.doi.org/10.1104/pp.113.222430

de Storme N, Zamariola L, Mau M, Sharbel T F, Geelen D:

Volume-based pollen size analysis: an advanced method to assess somatic and gametophytic ploidy in flowering plants. Plant Reprod. 26 (2013) 65-81. https://dx.doi.org/10.1007/s00497-012-0209-0

Dobeš C, Milosevic A, Prohaska D, Scheffknecht S, Sharbel T F, Hülber K:

Reproductive differentiation into sexual and apomictic polyploid cytotypes in Potentilla puberula (Potentilleae, Rosaceae). Ann. Bot. 112 (2013) 1159-1168. https://dx.doi.org/10.1093/aob/mct167

Galla G, Volpato M, Sharbel T F, Barcaccia G:

Computational identification of conserved microRNAs and their putative targets in the Hypericum perforatum L. flower transcriptome. Plant Reprod. 26 (2013) 209-229. https://dx.doi.org/10.1007/s00497-013-0227-6

Hofrichter J, Krohn M, Schumacher T, Lange C, Feistel B, Walbroel B, Heinze H J, Crockett S, Sharbel T F, Pahnke J:

Reduced Alzheimer’s disease pathology by St. John’s wort treatment is independent of hyperforin and facilitated by ABCC1 and microglia activation in mice. Curr. Alzheimer Res. 10 (2013) 1057-1069. https://dx.doi.org/10.2174/15672050113106660171

Koch M A, Scheriau C, Betzin A, Hohmann N, Sharbel T F:

Evolution of cryptic gene pools in Hypericum perforatum: the influence of reproductive system and gene flow. Ann. Bot. 111 (2013) 1083-1094. https://dx.doi.org/10.1093/aob/mct065

Lovell J:

What are the factors that constrain or promote adaptation in Arabidopsis thaliana and its close relative, Boechera? (PhD Thesis) Fort Colins/USA, Colorado State University (2013) 138 pp.

Lovell J T, Aliyu O M, Mau M, Schranz M E, Koch M, Kiefer C, Song B H, Mitchell-Olds T, Sharbel T F:

On the origin and evolution of apomixis in Boechera. Plant Reprod. 26 (2013) 309-315. https://dx.doi.org/10.1007/s00497-013-0218-7

Mau M:

Identification, molecular analysis and phylogeographic distribution of the chimeric UPGRADE-2 gene, a candidate for the initiation of unreduced pollen formation in apomictic Boechera (Brassicaceae). (PhD Thesis) Jena, Ruprecht-Karls-Universität, Heidelberg und International Max Planck Research School (IMPRS) (2013) 168 pp.

Mau M, Corral J M, Vogel H, Melzer M, Fuchs J, Kuhlmann M, de Storme N, Geelen D, Sharbel T F:

The conserved chimeric transcript UPGRADE2 is associated with unreduced pollen formation and is exclusively found in apomictic Boechera species. Plant Physiol. 163 (2013) 1640-1659. https://dx.doi.org/10.1104/pp.113.222448

Pellino M, Hojsgaard D, Schmutzer T, Scholz U, Hörandl E, Vogel H, Sharbel T F:

Asexual genome evolution in the apomictic Ranunculus auricomus complex: examining the effects of hybridization and mutation accumulation. Mol. Ecol. 22 (2013) 5908-5921. https://dx.doi.org/10.1111/mec.12533

Piwczyński M, Ponikierska A, Puchalka R, Corral J M:

Expression of anatomical leaf traits in homoploid hybrids between deciduous and evergreen species of Vaccinium. Plant Biol. 15 (2013) 522-530. https://dx.doi.org/10.1111/j.1438-8677.2012.00656.x

2012

Amiteye S:

MicroRNAs profiling and analysis in floral tissues of sexual and apomictic Boechera species. (PhD Thesis) Jena, Ruprecht-Karls-Universität, Heidelberg und International Max Planck Research School (IMPRS) (2012) 153 pp.

Cockram J, Thiel T, Steuernagel B, Stein N, Taudien S, Bailey P C, OSullivan D M:

Genome dynamics explain the evolution of flowering time CCT domain gene families in the Poaceae. PLoS One 7 (2012) e45307. https://dx.doi.org/10.1371/journal.pone.0045307

Róis A S, Teixeira G, Sharbel T F, Fuchs J, Martins S, Espírito-Santo D, Caperta A D:

Male fertility versus sterility, cytotype, and DNA quantitative variation in seed production in diploid and tetraploid sea lavenders (Limonium sp., Plumbaginaceae) reveal diversity in reproduction modes. Sex. Plant Reprod. 25 (2012) 305-318. https://dx.doi.org/10.1007/s00497-012-0199-y

Voigt-Zielinski M L, Piwczynski M, Sharbel T F:

Differential effects of polyploidy and diploidy on fitness of apomictic Boechera. Sex. Plant Reprod. 25 (2012) 97-109. https://dx.doi.org/10.1007/s00497-012-0181-8

2011

Amiteye S, Corral J M, Sharbel T F:

Overview of the potential of microRNAs and their target gene detection for cassava (Manihot esculenta) improvement. Afr. J. Biotechnol. 10 (2011) 2562-2573. https://dx.doi.org/10.5897/AJB10.017

Amiteye S, Corral J M, Vogel H, Sharbel T F:

Analysis of conserved microRNAs in floral tissues of sexual and apomictic Boechera species. BMC Genomics 12 (2011) 500. https://dx.doi.org/10.1186/1471-2164-12-500

Bringezu T G G, Sharbel T F, Weber W E:

Grain development and endoreduplication in maize and the impact of heat stress. Euphytica 182 (2011) 363-376. https://dx.doi.org/10.1007/s10681-011-0506-y

Corral J M, Molins M P, Aliyu O M, Sharbel T F:

Isolation and characterization of microsatellite loci from apomictic Hypericum perforatum (Hypericaceae). Am. J. Bot. 98 (2011) e167-e169. https://dx.doi.org/10.3732/ajb.1100059

Galla G, Barcaccia G, Schallau A, Puente Molins M, Bäumlein H, Sharbel T F:

The cytohistological basis of apospory in Hypericum perforatum L. Sex. Plant Reprod. 24 (2011) 47-61. https://dx.doi.org/10.1007/s00497-010-0147-7

Galla G, Zenoi S, Marconi G, Marino G, Botton A, Pinosa F, Citterio S, Collani S, Ruperti B, Palme K, Albertini E, Pezzotti M, de Jong H, Mau M, Sharbel T F, de Sorme N, Geelen D, Barcaccia G:

Sporophytic and gametophyitic functions of the cell cycle-associated Mob1 gene in Arabidopsis thaliana L. Gene 484 (2011) 1-12. https://dx.doi.org/10.1016/j.gene.2011.05.009

Muñoz-Pajares A J, Herrador M B, Abdelaziz M, Picó F X, Sharbel T F, Gómez J M, Perfectti F:

Characterization of microsatellite loci in Erysimum mediohispanicum (Brassicaceae) and cross-amplification in related species. Am. J. Bot. 98 (2011) e287-289. https://dx.doi.org/10.3732/ajb.1100181

Paule J, Sharbel T F, Dobes C:

Apomictic and sexual lineages of the Potentilla argentea L. group (Rosaceae): Cytotype and molecular genetic differentiation. Taxon 60 (2011) 721-732.

Pellino M, Sharbel T F, Mau M, Amiteye S, Corral J M:

Selection of reference genes for quantitative real-time PCR expression studies of microdissected reproductive tissues in apomictic and sexual Boechera. BMC Res. Notes 4 (2011) 303. https://dx.doi.org/10.1186/1756-0500-4-303

2010

Albertini E, Barcaccia G, Mazzucato A, Sharbel T F, Falcinelli M:

Apomixis in the era of biotechnology. In: Pua E-C, Davey M R (Eds.): Plant developmental biology - biotechnological perspectives. Vol. 1. Heidelberg [u.a.]: Springer (2010) ISBN 978-3-642-02300-2, 405-436. https://dx.doi.org/10.1007/978-3-642-02301-9_20

Aliyu O M, Schranz M E, Sharbel T F:

Quantitative variation for apomixis components in the genus Boechera. Am. J. Bot. 97 (2010) 1719-1731. https://dx.doi.org/10.3732/ajb.1000188

Ambrosi D, Galla G, Purelli M, Barbi T, Fabbri A, Lucretti S, Sharbel T F, Barcaccia G:

DNA Markers and FCSS analyses shed light on the genetic diversity and reproductive strategy of Jatropha curcas L. Diversity 2 (2010) 810-836. https://dx.doi.org/10.3390/d2050810

Sharbel T F, Voigt M L, Corral J M, Galla G, Kumlehn J, Klukas C, Schreiber F, Vogel H, Rotter B:

Apomictic and sexual ovules of Boechera display heterochronic global gene expression patterns (Hofmann, N.R.: Apomixis and gene expression in Boechera. Plant Cell (2010) 22:539. Highlight of Sharbel et al. 2010 by Plant Cell scientific editor). Plant Cell 22 (2010) 655-671. https://dx.doi.org/10.1105/tpc.109.072223

2009

Anssour S, Krugel T, Sharbel T F, Saluz H P, Bonaventure G, Baldwin I T:

Phenotypic, genetic and genomic consequences of natural and synthetic polyploidization of Nicotiana attenuata and Nicotiana obtusifolia. Ann. Bot. 103 (2009) 1207-1217. https://dx.doi.org/10.1093/aob/mcp058

Corral J M, Piwgzynski M, Sharbel T F:

Allelic sequence divergence in the apomictic Boechera holboellii complex. In: Schön I, Martens K, Van Dijk P (Eds.): Lost sex. The evolutionary biology of parthenogenesis. Dordrecht [u.a.]: Springer (2009) ISBN 978-90-481-2769-6, 495-516. https://dx.doi.org/10.1007/978-90-481-2770-2_23

Kiefer C, Dobeŝ C, Sharbel T F, Koch M A:

Phylogeographic structure of the chloroplast DNA gene pool in North American Boechera - A genus and continental-wide perspective. Mol. Phylogenet. Evol. 52 (2009) 303-311. https://dx.doi.org/10.1016/j.ympev.2009.03.016

Nyabuga F N, Loxdale H D, Sharbel T F, Todd M, Weisser W W:

Microsatellites from Lysiphlebus hirticornis Mackauer (Hymenoptera: Braconidae), a specialist primary parasitoid attacking the specialist tansy aphid, Metopeurum fuscoviride Stroyan (Hemiptera: Aphididae). Mol. Ecol. Resour. 9 (2009) 931-934. https://dx.doi.org/10.1111/j.1755-0998.2008.02488.x

Pellio M:

Apomixis: a revolutionary tool for agriculture. Tested housekeeping genes in Boechera for gene expression studies. (Diploma Thesis) Padova, University of Padova (2009) 55 pp.

Sharbel T F, Voigt M L, Corral J M, Thiel T, Varshney A, Kumlehn J, Vogel H, Rotter B:

Molecular signatures of apomictic and sexual ovules in the Boechera holboellii complex. Plant J. 58 (2009) 870-882. https://dx.doi.org/10.1111/j.1365-313X.2009.03826.x

Voigt M L:

From a phenotype to transcriptomics, apomixis initiation in the genus Boechera. (PhD Thesis) Heidelberg, Ruprecht-Karls-Universität (2009) 150 pp.

2008

Aliyu O M:

Compatibility and fruit-set in cashew (Anacardium occidentale L.). Euphytica 160 (2008) 25-33. https://dx.doi.org/10.1007/s10681-007-9517-0

Prodanovic S, Matzk F, Zoric D:

Effect of dicamba on wheat haploid embryo development. Cereal Res. Commun. 36 (2008) 43-51. https://dx.doi.org/10.1556/CRC36.2008.1.5

2007

Barcaccia G, Bäumlein H, Sharbel T F:

Apomixis in St. Johns wort (Hypericum perforatum L.): an overview and glimpse towards the future. In: Hörandl E, Grossniklaus U, van Dijk P J, Sharbel T F (Eds.): Apomixis: evolution, mechanisms and perspectives. (Series: Regnum vegetabile, Vol. 147) Rugell, Liechtenstein: Gantner (2007) ISBN 978-3-906166-60-5, 259-280.

Dobeš C, Sharbel T F, Koch M:

Towards understanding the dynamics of hybridization and apomixis in the evolution of genus Boechera (Brassicaceae). Syst. Biodivers. 5 (2007) 321-331. https://dx.doi.org/10.1017/S1477200007002423

Hörandl E, Grossniklaus U, Sharbel T F (Eds.):

Apomixis: evolution, mechanisms and perspectives. (Series: Regnum vegetabile, Vol. 147) Rugell, Liechtenstein: Gantner (2007) ISBN 978-3-906166-60-5, 424 pp.

Kantama L, Sharbel T F, Schranz M E, Mitchell-Olds T, de Vries S, de Jong H:

Diploid apomicts of the Boechera holboellii complex display large-scale chromosome substitutions and aberrant chromosomes. Proc. Natl. Acad. Sci. USA 104 (2007) 14026-14031. https://dx.doi.org/10.1073/pnas.0706647104

Matzk F:

Reproduction mode screening. In: Doležel J, Greilhuber J, Suda J (Eds.): Flow cytometry with plant cells: analysis of genes, chromosomes and genomes. Weinheim: WILEY-VCH Verlag (2007) ISBN 978-3-527-31487-4, 131-152. https://dx.doi.org/10.1002/9783527610921.ch6

Matzk F, Prodanovic S, Czihal A, Tiedemann J, Arzenton F, Blattner F R, Kumlehn J, Altschmied L, Schubert I, Johnston A, Grossniklaus U, Bäumlein H:

Genetic control of apomixis: preliminary lessons from Poa, Hypericum and wheat egg cells. In: Hörandl E, Grossniklaus U, van Dijk P J, Sharbel T F (Eds.): Apomixis: evolution, mechanisms and perspectives. (Series: Regnum vegetabile, Vol. 147) Rugell, Liechtenstein: Gantner (2007) ISBN 978-3-906166-60-5, 159-166.

Voigt M-L, Melzer M, Rutten T, Mitchell-Olds T, Sharbel T F:

Gametogenesis in the apomictic Boechera holboellii complex: the male perspective. In: Hörandl E, Grossniklaus U, Sharbel T F (Eds.): Apomixis: evolution, mechanisms and perspectives. (Series: Regnum vegetabile, Vol. 147) Rugell, Liechtenstein: Gantner (2007) ISBN 978-3-906166-60-5, 235-257.

2006

Barcaccia G, Arzenton F, Sharbel T F, Varotto S, Parrini P, Lucchin M:

Genetic diversity and reproductive biology in ecotypes of the facultative apomict Hypericum perforatum L. Heredity 96 (2006) 322-334. https://dx.doi.org/10.1038/sj.hdy.6800808

Dobes C, Koch M, Sharbel T F:

Embryology, karyology, and modes of reproduction in the North American genus Boechera (Brassicaceae): A compilation of seven decades of research. Ann. Missouri Bot. Garden 93 (2006) 517-534. https://dx.doi.org/10.3417/0026-6493(2007)93[517:EKAMOR]2.0.CO;2