Results 171 to 180 of about 20,845 (229)

Bimodal centromeres in pentaploid dogroses shed light on their unique meiosis. [PDF]

Nature
Herklotz V, Zhang M, Nascimento T, Kalfusová R, Lunerová J, Fuchs J, Harpke D, Huettel B, Pfordt U, Wissemann V, Kovařík A, Marques A, Ritz CM.   +12 more
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Pollen performance under controlled temperatures and chromosome stability of diploid and tetraploid citrus. [PDF]

BMC Plant Biol
Montalt R, Lora J, Garcia-Lor A, Mouret P, Navarro L, Ollitrault P, Aleza P.   +6 more
europepmc   +1 more source

On the way to diploidization and unexpected ploidy in the grass Sporobolus section Spartina mesopolyploids. [PDF]

Nat Commun
Salmon A, Hao Y, Milin M, Lima O, Cavé-Radet A, Giraud D, Cruaud C, Labadie K, Istace B, Belser C, Aury JM, Wincker P, Li B, Li LF, Ainouche M.   +14 more
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Tetraploid turnips ( Brassica rapa ssp. rapa ) are highly tolerant of tetravalent formation and aneuploidy

Lv Z, Schneider-Huether I, He F, Mason AS.   +3 more
europepmc   +1 more source

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Consequences of whole genome duplication for 2n pollen performance

Plant Reproduction, 2021
The vegetative cell of the angiosperm male gametophyte (pollen) functions as a free-living, single-celled organism that both produces and transports sperm to egg. Whole-genome duplication (WGD) should have strong effects on pollen because of the haploid to diploid transition and because of both genetic and epigenetic effects on cell-level phenotypes ...
openaire   +2 more sources

Meiotic aberrations during 2n pollen formation in Begonia

Heredity, 2009
Unreduced gametes are the driving force for the polyploidization of plants in nature, and are also an important tool for ploidy breeding. The final heterozygosity of a 2n pollen grain depends on the cytological mechanism behind 2n pollen formation.
A, Dewitte, T, Eeckhaut, J, Van Huylenbroeck, E, Van Bockstaele   +3 more
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The production of 2n pollen in rose

Euphytica, 2006
Based on the size differences found between haploid and diploid pollen produced by diploid and tetraploid rose cultivars, respectively, 2n pollen producers were identified in a population of 53 diploid hybrids from a cross between a dihaploid rose, derived from the haploidization of a tetraploid modern cultivar and the diploid species R.
L. Crespel, S. C. Ricci, S. Gudin
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Cytology of potato triploids producing 2N pollen

American Potato Journal, 1975
Parallel spindles (ps) were found in a spontaneously occurring triploid plant ofS. chacoense and two triploids ofS. commersonii. This may be the basis for the formation of plump, stainable pollen in these triploids, since ps at Ana II could confer male fertility to odd-ploids by forming pollen with the 2n chromosome number.
D. W. S. Mok, S. J. Peloquin, T. R. Tarn
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Phenotypic recurrent selection for 2n pollen and 2n egg production in diploid alfalfa

Euphytica, 1991
Cultivated alfalfa (Medicago sativa L.) is a polysomic polyploid with tetrasomic inheritance. In this crop the hybridization of gametes with the somatic chromosome number (2n gametes) produced by diploid hybrids is a valuable method to maximize heterozygosity.
S. Tavoletti, A. Mariani, F. Veronesi
openaire   +1 more source