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  • Hyacinthaceae  (2)
  • Springer  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Pollenfertility and seed formation in theOrnithogalum umbellatum/angustifolium complex (Liliaceae/Scilloideae) (1985)
    Springer
    Plant systematics and evolution 149 (1985), S. 287-297 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Liliaceae ; Hyacinthaceae ; Scilloideae ; Ornithogalum ; O. umbellatum ; O. angustifolium ; Polyploid complex ; pollen shape ; pollen fertility ; seed formation ; seedlings ; weather circumstances
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The pollen fertility and seed formation of six species of theOrnithogalum umbellatum/angustifolium complex and of seven related species were studied. Four types of pollen grains could be recognized. The pollen fertility varied greatly in this complex and is not related to the ploidy level. The seed formation ofO. umbellatum showed an adaptation to a subcontinental-Mediterranean climate, that ofO. angustifolium to an Atlantic climate. In both cases raindrops seem to be important for pollination, in view of the absence of insect pollinators. After open pollination 113 seedlings were obtained in four species. Their chromosome numbers were determined. Nearly all the cultivated seedlings were aneuploid, which points to a positive selection of euploids in nature, because aneuploid individuals are rare in the wild.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983312
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  • 2
    Electronic Resource
    Electronic Resource
    Crossing and selfing experiments in theOrnithogalum umbellatum/augustifolium complex (1985)
    Springer
    Plant systematics and evolution 150 (1985), S. 179-190 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Liliaceae ; Scilloideae ; Hyacinthaceae ; Ornithogalum ; O. umbellatum ; O. angustifolium ; Polyploid complex ; self-pollination ; bulbil vs. seed production ; crossing experiments ; fertility relationship
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The fertility relationships ofOrnithogalum umbellatum, O. angustifolium and 9 related taxa were studied.O. umbellatum andO. angustifolium, which are not interfertile, are both recognized as a comparium. Pollination of five species belonging to theO. umbellatum/angustifolium polyploid complex, i.e.O. umbellatum, O. angustifolium, O. baeticum, O. monticolum andO. algeriense, resulted in a moderate seed set. However, the seeds obtained after these interspecific crosses did not germinate. Six related species, i.e.O. exscapum, O. nivale, O. comosum, O. collinum, O. gussonei andO. woronowii showed a very low seed set after being crossed. One exception occurs:O. nivale ×O. exscapum. The seed set was also low after the complex species had been crossed with some related species, but there was one exception: both reciprocal crosses betweenO. monticolum andO. woronowii yielded some viable seeds. No other interspecific crosses gave rise to viable seeds. Bulbil-producing species have a lower seed set after self-pollination than species which do not produce bulbils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984194
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    Paper (German National Licenses)
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