Results 51 to 60 of about 577 (110)

Emergence of apospory and bypass of meiosis via apomixis after sexual hybridisation and polyploidisation

New Phytologist, Volume 204, Issue 4, Page 1000-1012, December 2014., 2014
Summary Hybridisation and polyploidy are major forces contributing to plant speciation. Homoploid (2x) and heteroploid (3x) hybrids, however, represent critical stages for evolution due to disturbed meiosis and reduced fertility. Apomixis – asexual reproduction via seeds – can overcome hybrid sterility, but requires several concerted alterations of ...
Diego Hojsgaard, Johann Greilhuber, Marco Pellino, Ovidiu Paun, Timothy F. Sharbel, Elvira Hörandl   +5 more
wiley   +1 more source

Sexual polyploidization in plants – cytological mechanisms and molecular regulation

New Phytologist, Volume 198, Issue 3, Page 670-684, May 2013., 2013
Summary In the plant kingdom, events of whole genome duplication or polyploidization are generally believed to occur via alterations of the sexual reproduction process. Thereby, diploid pollen and eggs are formed that contain the somatic number of chromosomes rather than the gametophytic number.
Nico De Storme, Danny Geelen
wiley   +1 more source

Comparative transcriptome analysis of the wild-type model apomict Hieracium praealtum and its loss of parthenogenesis (lop) mutant

BMC Plant Biology, 2018
Background Asexual seed formation (apomixis) has been observed in diverse plant families but is rare in crop plants. The generation of apomictic crops would revolutionize agriculture, as clonal seed production provides a low cost and efficient way to ...
Sophia Bräuning, Andrew Catanach, Janice M. Lord, Ross Bicknell, Richard C. Macknight   +4 more
doaj   +1 more source

Induction of Synthetic Apomixis in Two Sorghum Hybrids Enables Seed Yield and Genotype Preservation Over Multiple Generations

Plant Biotechnology Journal, Volume 24, Issue 3, Page 1712-1724, March 2026.
ABSTRACT Induction of apomixis, or clonal reproduction through seed, could economise commercial hybrid seed production and enable smallholder farmers to save and sow hybrid seed. Here, we demonstrate the synthetic induction of apomixis in two sorghum hybrids and show that the clonal hybrid seed can be maintained across multiple seed generations.
Marissa K. Simon, Li Yuan, Ping Che, Kevin Day, Todd Jones, Ian D. Godwin, Anna M. G. Koltunow, Marc C. Albertsen   +7 more
wiley   +1 more source

Prospects and limits of the flow cytometric seed screen – insights from Potentilla sensu lato (Potentilleae, Rosaceae)

New Phytologist, Volume 198, Issue 2, Page 605-616, April 2013., 2013
Summary The flow cytometric seed screen allows for identification of reproductive modes of seed formation and inference of the ploidy of contributing gametes. However, the lack of a mathematical formalization to infer male/female genomic contributions, and the prerequisite of a binucleate female contribution to the endosperm limits its applicability ...
Christoph Dobeš, Andrea Lückl, Karl Hülber, Juraj Paule   +3 more
wiley   +1 more source

Ecological and evolutionary implications of hybridization, polyploidy and apomixis in angiosperms

Botan‪ical Sciences
Hybridization, polyploidy, and apomixis are related to the diversification of angiosperms, generating complex taxonomic relationships between species. Despite the differences in the frequencies of these phenomena, apomixis, the asexual seed production ...
Cinthya I. Cervantes-Díaz, Ken Oyama, Eduardo Cuevas   +2 more
doaj   +1 more source

Role of paternal Oryza sativa Baby Booms (OsBBMs) in initiating de novo gene expression and regulating early zygotic development in rice

The Plant Journal, Volume 122, Issue 6, June 2025.
SUMMARY Oryza sativa BABY BOOM 1 (OsBBM1), a member of the AP2/ERF family of transcription factors, is expressed from paternal allele in rice zygote and plays a crucial role in initiating zygotic development. However, the mechanism how the paternal OsBBM1 drives this development remains unclear. Rice zygotes with four different gamete combinations with
Nargis Akter, Takumi Tezuka, Kasidit Rattanawong, Aya Satoh, Atsuko Kinoshita, Yutaka Sato, Takashi Okamoto   +6 more
wiley   +1 more source

Timing of megasporogenesis in Tripsacum species (Poaceae) as related to the control of apoximis and sexuality [PDF]

, 1994
Chez différentes espèces pseudogames aposporiques (#Panicum maximum, Ranunculus auricomus, Paspalumnotatum$), des différences pour la durée de la mégasporogenèse ont été observées entre les formes sexuées et aposporiques ; les gamétophytes femelles ...
Leblanc, Olivier, Savidan, Yves
core  

The Potential for Evolutionary Responses to Cell-Lineage Selection on Growth Form and Its Plasticity in a Red Seaweed [PDF]

, 2008
Despite much theoretical discussion on the evolutionary significance of intraclonal genetic variation, particularly for modular organisms whose lack of germ-soma segregation allows for variants arising in clonal growth to contribute to evolutionary ...
Monro, Keyne, Poore, Alistair G. B.
core   +1 more source

Pathways to polyploidy : indications of a female triploid bridge in the alpine species Ranunculus kuepferi (Ranunculaceae) [PDF]

, 2017
Polyploidy is one of the most important evolutionary processes in plants. In natural populations, polyploids usually emerge from unreduced gametes which either fuse with reduced ones, resulting in triploid offspring (triploid bridge), or with other ...
De Storme, Nico, Dullinger, Stefan, Geelen, Danny, Hörandl, Elvira, Kirchheimer, Bernhard, Schinkel, Christoph CF   +5 more
core   +2 more sources