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Showing 1 to 7 of 7 for “"microsporogenesis"”.
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Microsporogenesis in Male Fertile and S-Type Cytoplasmic Male-Sterile Maize
Made available in DSpace on 2014-12-14T15:38:05Z (GMT). No. of bitstreams: 1 8009056.pdf: 5244110 bytes, checksum: 0260ee2fe584a90c4dc5ef340014deb9 (MD5) Previous issue date: 1979
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Self-incompatibility in Cosmos atrosanauineus: a rare Mexican endemic species of Asteraceae
… of closely related or identical genotypes. Microsporogenesis within the species appears normal, with no discernible differences between microsporogenesis in C. atrosanguineus and two seed-producing Cosmos species. The C. atrosanguineus karyotype and chromosome associations at meiosis …
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The embryology of Prionium serratum (L.f.) Drege ex E.Mey. (Juncaceae:Cyperales) and its implications for the phylogeny of Cyperales
… The tapetum is glandular-secretory and microsporogenesis is simultaneous. Pollen is united in tetrahedral and cross tetrads and is tri-nucleate at release. The ovary is trilocular, there are three stigmata and the style is absent. There are many ovules per locule and placentation is …
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Studies of in vitro flowering and de novo flowers of Nicotiana tabacum
… abnormalities from both in vivo and de novo microsporogenesis of haploids.
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Chromosome pairing and its relationship to fertility in cytotypes of prairie cordgrass (Spartina pectinata Link)
… study, chromosome pairing during meiosis I of microsporogenesis was analyzed in tetraploid, hexaploid, and octoploid prairie cordgrass cytotypes. Normal chromosome pairing and segregation was observed in tetraploids and octoploids whereas abnormality was observed in hexaploids. Chromosome …
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Genetic and Physiological Bases of Heat-Induced Floret Sterility in Wheat
The global temperature is increasing at an alarming rate, which is a major concern for wheat growers due to the adverse effects of these temperatures on crop productivity. The current study focussed on the impact of brief episodes of high temperatures during the booting stage on floret fertility in …
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Isolation in Tragopogon (Compositae)
… of the three taxa. (3) Cytologic studies of microsporogenesis in the two parental species and their interspecific hybrid were made to compare chromosome homologies by determining whether synapsis was regular in the spore mother cells. (4) Paper chromatographic analysis of amino acids and …