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Megaspore competition in F1 and F2 hybrids between Oenothera hookeri and Oe. suaveolens


 
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1. Title Title of document Megaspore competition in F1 and F2 hybrids between Oenothera hookeri and Oe. suaveolens
 
2. Creator Author's name, affiliation, country Renata Śnieżko; Maria Curie-Skłodowska University
 
3. Subject Discipline(s)
 
3. Subject Keyword(s) megaspore competition; hybrid Oenothera megasporogenesis
 
4. Description Abstract Megasporogenesis and development of the embryo sac were investigated in F1 and F2 hybrids from crosses of Oe. hookeri and Oe. suaveolens. All hybrids form heteropolar and homopolar magaspore tetrads; the embryo sac, however, usually develops from the micropylar megaspore. Its development may occur immediately after degeneration of three other megaspores or after a period of competition between both apical megaspores. They develop simultaneously for a relatively short time, after which the growth of the chalazal megaspore is inhibited, although the latter does not degenerate. The micropylar megaspore as a rule develops without disturbances into the embryo sac, but in some ovules it is formed from the chalazal megaspore or double ones arise from both apical megaspores of the tetrad. The frequency of the micropylar embryo sac formation seems to be dependent above all on the hybrid plant genome and not on the haploid genome of the megaspore.
 
5. Publisher Organizing agency, location Polish Botanical Society
 
6. Contributor Sponsor(s)
 
7. Date (YYYY-MM-DD) 1984
 
8. Type Status & genre Peer-reviewed Article
 
8. Type Type
 
9. Format File format PDF
 
10. Identifier Uniform Resource Identifier https://pbsociety.org.pl/journals/index.php/asbp/article/view/3145
 
10. Identifier Digital Object Identifier (DOI) https://doi.org/10.5586/asbp.1984.028
 
11. Source Title; vol., no. (year) Acta Societatis Botanicorum Poloniae; Vol 53, No 3 (1984)
 
12. Language English=en
 
13. Relation Supp. Files
 
14. Coverage Geo-spatial location, chronological period, research sample (gender, age, etc.)
 
15. Rights Copyright and permissions Copyright (c) 2014 Renata Śnieżko
http://creativecommons.org/licenses/by/3.0