Frontiers in Zoology, 2007 Background Unisexuality, or all female reproduction, is rare among vertebrates. Studying these exceptional organisms may give useful information with respect to the evolution and maintenance of sexual reproduction.
de León Francisco +4 more
doaj +1 more source
2n Gamete formation in the genus Brachiaria (Poaceae: Paniceae). [PDF]
, 2011 Microsporogenesis of several Brachiaria species of the Brazilian collection at Embrapa Beef Cattle has been analyzed in detail. This paper reports abnormal cytokinesis in three accessions of three different species (Brachiaria humidicola, 2n = 4x = 36 ...
BOLDRINI, K. R. +5 more
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The Two Faces of Introgression in Conservation Biology 基因渗入在保育生物学中的双重面貌
Integrative Conservation, Volume 4, Issue 3, Page 339-344, September 2025.Conservation biologist need to take into account the various aspects of introgression in their attempts to protect the species integrity and evolutionary potential of threatened species. To do so, they have to overcome the bias created by the Mayrian species concept that considers species as having distinct gene pools.
Harald Schneider, Charles H. Cannon
wiley +1 more source
GAMETAS NÃO REDUZIDOS NO MELHORAMENTO DE PLANTAS UNREDUCED GAMETES IN PLANT BREEDING
Ciência Rural, 2001 Nesta revisão são abordados o papel dos gametas não reduzidos (gametas 2n), ou seja, aqueles com o número somático de cromossomos, na origem dos poliplóides, e sua utilização no melhoramento genético de plantas.
Maria Teresa Schifino-Wittmann +1 more
doaj +1 more source
Multiple hybridization events in Cardamine (Brassicaceae) during the last 150 years: revisiting a textbook example of neoallopolyploidy [PDF]
, 2017 Background and Aims Recently formed allopolyploid species represent excellent subjects for exploring early stages of polyploid evolution. The hexaploid Cardamine schulzii was regarded as one of the few nascent allopolyploid species formed within the past
Krak, Karol +6 more
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Cold-induced male meiotic restitution in Arabidopsis thaliana is not mediated by GA-DELLA signaling [PDF]
, 2018 Short periods of cold stress induce male meiotic restitution and diploid pollen formation in Arabidopsis thaliana by specifically interfering with male meiotic cytokinesis.
De Storme, Nico +2 more
core +2 more sources
Actin filaments drive spindle positioning in Arabidopsis meiosis II
New Phytologist, Volume 248, Issue 5, Page 2187-2191, December 2025.
Yingrui Ma, Hua Jiang
wiley +1 more source
Analysis of a novel mutant allele of GSL8 reveals its key roles in cytokinesis and symplastic trafficking in Arabidopsis [PDF]
, 2018 Background Plant cell walls are mainly composed of polysaccharides such as cellulose and callose. Callose exists at a very low level in the cell wall; however, it plays critical roles at different stages of plant development as well as in defence against
Austin, Ryan S +7 more
core +3 more sources
Unraveling reticulate evolution in North American
BMC Evolutionary Biology, 2012 Background The thirteen species of Dryopteris in North America have long been suspected of having undergone a complicated history of reticulate evolution via allopolyploid hybridization. Various explanations for the origins of the allopolyploid taxa have
Sessa Emily B +2 more
doaj +1 more source
Nonrandom patterns of genetic admixture expose the complex historical hybrid origin of unisexual leaf beetle species in the genus Calligrapha [PDF]
, 2014 Many unisexual animal lineages supposedly arose from hybridization. However, support for their putative hybrid origins mostly comes from indirect methodologies, which are rarely confirmatory.
Gómez-Zurita, Jesús +1 more
core +2 more sources