Results 31 to 40 of about 17,851 (240)

Synaptonemal complex formation in Avena polyploids [PDF]

Heredity, 1989
Avena maroccana (2n = 4x = 28) and A. sativa (2n = 6x = 42) are allopolyploids. Reconstructions from electron micrographs of synaptonemal complexes in serial sections of pollen mother cells showed that associations at zygotene and subsequent stages of meiosis are confined to homologous chromosomes only, with the result that only bivalents are generated.
M Jones, H Rees, G Jenkins
openaire   +1 more source

Untangling Complex Histories of Genome Mergings in High Polyploids [PDF]

Systematic Biology, 2007
Polyploidy, the duplication of entire genomes, plays a major role in plant evolution. In allopolyploids, genome duplication is associated with hybridization between two or more divergent genomes. Successive hybridization and polyploidization events can build up species complexes of allopolyploids with complicated network-like histories, and the ...
Brysting, Anne K., Oxelman, Bengt, Huber, Katharina T., Moulton, Vincent, Brochmann, Christian   +4 more
openaire   +3 more sources

Molecular evidence for multiple polyploidization and lineage recombination in the Chrysanthemum indicum polyploid complex (Asteraceae) [PDF]

New Phytologist, 2006
The Chrysanthemum indicum polyploid complex comprises morphologically differentiated diploids, tetraploids and hybrids between C. indicum and C. lavandulifolium. The relationships between species and cytotypes within this complex remain poorly understood.
Wenhua, Yang, Beverley J, Glover, Guang-Yuan, Rao, Ji, Yang   +3 more
openaire   +2 more sources

Induction of Synthetic Polyploids and Assessment of Genomic Stability in Lippia alba

Frontiers in Plant Science, 2020
Polyploidy is widely recognized as a major evolutionary force in plants and has been reported in the genus Lippia (Verbenaceae). Lippia alba, the most studied species, has been documented as a polyploid complex involving at least four ploidal levels.
Sirlei Aparecida Julião, Christiane do Valle Ribeiro, Juliana Mainenti Leal Lopes, Elyabe Monteiro de Matos, Aryane Campos Reis, Paulo Henrique Pereira Peixoto, Marco Antonio Machado, Ana Luisa Sousa Azevedo, Richard Michael Grazul, José Marcello Salabert de Campos, Lyderson Facio Viccini   +10 more
doaj   +1 more source

The effect of polyploidy and hybridization on the evolution of floral colour in Nicotiana (Solanaceae). [PDF]

, 2015
Speciation in angiosperms can be accompanied by changes in floral colour that may influence pollinator preference and reproductive isolation. This study investigates whether changes in floral colour can accompany polyploid and homoploid hybridization ...
Taylor, L, Arnold, Sarah E., Arnold, SE, Arnold, Sarah E. J., Chittka, Lars, Chittka, L, Kovařík, A, Le Comber, S., Knapp, S., Baldwin, Ian, Mhiri, C, Verity, Robert, Verity, R, Le Comber, SC, Taylor, Lin, Kelly, L., Le Comber, Steven C., Knapp, Sandra, Knapp, S, Leitch, A.R., Arnold, SEJ, Baldwin, I., Chase, M.W., Chittka, L., Leitch, AR, Leitch, Andrew R., Arnold, Sarah E.J., Mhiri, Corinne, McCarthy, E.W., Chase, Mark W., Kelly, LJ, Taylor, L., Arnold, S.E.J., Chase, M., Kovařík, Aleš, Kovařík, A., McCarthy, E., Leitch, A., Verity, R., McCarthy, Elizabeth W., Dodsworth, Steven, Kelly, L.J., Kelly, Laura J., Dodsworth, S., Mhiri, C., Dodsworth, S, Chase, MW, Arnold, S., Baldwin, I.T., Baldwin, Ian T., Le Comber, S.C., Baldwin, IT, McCarthy, EW   +52 more
core   +1 more source

DataSheet_1_Ecological niches in the polyploid complex Linum suffruticosum s.l..docx

, 2023
IntroductionThe high frequency of polyploidy in the evolutionary history of many plant groups occurring in the Mediterranean region is likely a consequence of its dynamic paleogeographic and climatic history.
Albano Figueiredo, Juan Arroyo (3260271), Juan Arroyo, Sara Lopes, Mariana Castro, Sara Lopes (10161661), Ana Afonso, Mariana Castro (664958), João Loureiro, Sílvia Castro, Ana Afonso (664960), Sílvia Castro (480402), Albano Figueiredo (8599500), João Loureiro (480403)   +13 more
core   +1 more source

Mining sequence variations in representative polyploid sugarcane germplasm accessions

BMC Genomics, 2017
Background Sugarcane (Saccharum spp.) is one of the most important economic crops because of its high sugar production and biofuel potential. Due to the high polyploid level and complex genome of sugarcane, it has been a huge challenge to investigate ...
Xiping Yang, Jian Song, Qian You, Dev R. Paudel, Jisen Zhang, Jianping Wang   +5 more
doaj   +1 more source

Development of an Agent-Based Model to Investigate Durability of Factor IX Activity in Hemophilia B Patients Treated With Etranacogene Dezaparvovec. [PDF]

CPT Pharmacometrics Syst Pharmacol
ABSTRACT Many currently approved gene therapies use adeno‐associated virus (AAV) to deliver DNA sequences encoding protein(s)‐of‐interest into cells. The AAV viral genome forms stable, circular DNA structures called episomes after entering the nuclei. Therapeutic proteins are then generated in vivo from transcription and translation of these episomes ...
Li Y, Nandy P, Jordie E, Knab T, Peppel K, Kirouac DC, Wilkins AK, Nuthalapati S.   +7 more
europepmc   +2 more sources

Genetic relationships and polyploid origins in the Lippia alba complex [PDF]

American Journal of Botany, 2020
PremisePlant genomes vary in size and complexity due in part to polyploidization. Latitudinal analyses of polyploidy are biased toward floras of temperate regions, with much less research done in the tropics. Lippia alba has been described as a tropical polyploid complex with diploid, triploid, tetraploid, and hexaploid accessions.
Juliana M L, Lopes, Humberto Henrique, de Carvalho, Cristiane, Zorzatto, Ana Luisa S, Azevedo, Marco Antonio, Machado, Fátima Regina G, Salimena, Richard M, Grazul, Matthew A, Gitzendanner, Douglas E, Soltis, Pamela S, Soltis, Lyderson F, Viccini   +10 more
openaire   +2 more sources

A first look at sea-lavenders genomics – can genome wide SNP information tip the scales of controversy in the Limonium vulgare species complex?

BMC Plant Biology, 2023
Background Sea-lavenders (Limonium Mill., Plumbaginaceae) are a cosmopolitan group of diploid and polyploid plants often adapted to extreme saline environments, with a mostly Tethyan distribution, occurring in the Mediterranean, Irano-Turanian, Euro ...
Francisco Pina-Martins, Ana D. Caperta, Sofia I. R. Conceição, Vera L. Nunes, Isabel Marques, Octávio S. Paulo   +5 more
doaj   +1 more source