Results 31 to 40 of about 3,612 (210)

Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress

open access: yesFrontiers in Plant Science, 2023
Susceptibility of the reproductive system to temperature fluctuations is a recurrent problem for crop production under a changing climate. The damage is complex as multiple processes in male and female gamete formation are affected, but in general ...
Cédric Schindfessel   +4 more
doaj   +1 more source

Novel Approaches for Species Concepts and Delimitation in Polyploids and Hybrids

open access: yesPlants, 2022
Hybridization and polyploidization are important processes for plant evolution. However, classification of hybrid or polyploid species has been notoriously difficult because of the complexity of processes and different evolutionary scenarios that do not ...
Elvira Hörandl
doaj   +1 more source

A single polyploidization event at the origin of the tetraploid genome of Coffea arabica is responsible for the extremely low genetic variation in wild and cultivated germplasm [PDF]

open access: yes, 2020
The genome of the allotetraploid species Coffea arabica L. was sequenced to assemble independently the two component subgenomes (putatively deriving from C. canephora and C.
Al Hakimi, Amin   +28 more
core   +3 more sources

Establishment of Apomixis in Diploid F2 Hybrids and Inheritance of Apospory From F1 to F2 Hybrids of the Ranunculus auricomus Complex

open access: yesFrontiers in Plant Science, 2018
Hybridization and polyploidization play important roles in plant evolution but it is still not fully clarified how these evolutionary forces contribute to the establishment of apomicts.
Birthe H. Barke   +2 more
doaj   +1 more source

Introgression in interspecific hybrids of lily [PDF]

open access: yes, 2002
In order to introduce new desirable characters into the cultivar assortment of lily a range of interspecific crossing barriers has to be overcome. By using various pollination and embryo rescue techniques pre- and postfertilization barriers were overcome
Lim, K.B.   +2 more
core   +2 more sources

Reproductive differentiation into sexual and apomictic polyploid cytotypes in Potentilla puberula (Potentilleae, Rosaceae) [PDF]

open access: yesAnnals of Botany, 2013
Intraspecific reproductive differentiation into sexual and apomictic cytotypes of differing ploidy is a common phenomenon. However, mechanisms enabling the maintenance of both reproductive modes and integrity of cytotypes in sympatry are as yet poorly understood.
Dobes, C.   +5 more
openaire   +3 more sources

Does hybridization between divergent progenitors drive whole-genome duplication? [PDF]

open access: yes, 2009
This is the peer reviewed version of the following article: BUGGS, R. J. A., SOLTIS, P. S. and SOLTIS, D. E. (2009), Does hybridization between divergent progenitors drive whole-genome duplication?.
Buggs, RJA, Soltis, DE, Soltis, PS
core   +1 more source

Occurrence of Unreduced Female Gametes Leads to Sexual Polyploidization in Lantana [PDF]

open access: yesJournal of the American Society for Horticultural Science, 2009
Lantana camara , a member of the verbena family, is a popular ornamental yet highly invasive plant. It can escape from cultivation through seed dispersal and can contaminate native lantana species ( Lantana depressa ) through cross-pollination. Ploidy manipulation is being
David M. Czarnecki, Zhanao Deng
openaire   +1 more source

CENH3-GFP: a visual marker for gametophytic and somatic ploidy determination in Arabidopsis thaliana [PDF]

open access: yes, 2016
Background: The in vivo determination of the cell-specific chromosome number provides a valuable tool in several aspects of plant research. However, current techniques to determine the endosystemic ploidy level do not allow non-destructive, cell-specific
Angenon, Geert   +4 more
core   +5 more sources

Polyploidy breaks speciation barriers in Australian burrowing frogs Neobatrachus [PDF]

open access: yes, 2020
Polyploidy has played an important role in evolution across the tree of life but it is still unclear how polyploid lineages may persist after their initial formation.
Booker, William   +11 more
core   +4 more sources

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