Geographical Distribution of Wild Lactuca Species (Asteraceae, Lactuceae)

Lebeda, A.; Doležalová, Ivana; Feráková, Viera; Astley, D.

doi:10.1663/0006-8101(2004)070[0328:gdowls]2.0.co;2

Cited by 104 publications

(105 citation statements)

References 23 publications

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“…Our data suggested that eastern Turkey and Armenia (or surrounding regions) might be the center of diversity of L. serriola and possibly its center of origin. The IranTurkey region is the distribution center of L. serriola and several other closely related species such as L. aculeata, L. scarioloides, and L. georgica (Zohary 1991;Lebeda et al 2004). Further sampling of the genetic diversity of L. serriola from other eastern Mediterranean areas, particularly the Iran-Turkey region, would provide better definition of the geographical limits of its center of diversity and origin.…”

Section: Discussionmentioning

confidence: 99%

Evolution and Genetic Population Structure of Prickly Lettuce (Lactuca serriola) and Its RGC2 Resistance Gene Cluster

et al. 2008

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Genetic structure and diversity of natural populations of prickly lettuce (Lactuca serriola) were studied using AFLP markers and then compared with the diversity of the RGC2 disease resistance gene cluster. Screening of 696 accessions from 41 populations using 319 AFLP markers showed that eastern Turkish and Armenian populations were the most diverse populations and might be located in the origin and center of diversity of L. serriola. Screening 709 accessions using the microsatellite MSATE6 that is located in the coding region of most RGC2 homologs detected 366 different haplotypes. Again, the eastern Turkish and Armenian populations had the highest diversities at the RGC2 cluster. The diversities at the RGC2 cluster in different populations were significantly correlated with their genomewide diversities. There was significant variation of copy number of RGC2 homologs in different populations, ranging from 12 to 22 copies per genome. The nucleotide diversities of two conserved lineages (type II) of RGC2 genes (K and L) were not correlated with diversities calculated using the MSATE6 or AFLP data. We hypothesize that the high genomewide diversity and diversity of the RGC2 cluster in eastern Turkish and Armenian populations resulted from high abiotic and biotic stresses in the regions of origin of L. serriola.

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Section: Discussionmentioning

confidence: 99%

Evolution and Genetic Population Structure of Prickly Lettuce (Lactuca serriola) and Its RGC2 Resistance Gene Cluster

et al. 2008

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“…These risks are thought to be higher if the wild plants show already weedy tendencies (Snow and Palma, 1997). In this context, Lactuca serriola is already described as an invasive weed in Canada and in Argentina, where it occurs in a variety of crops where notill or conservation tillage systems are used (Weaver and Downs, 2003), and in many European countries, where it occupies ruderal places (Lebeda et al, 2004). Interestingly enough, herbicide-resistant weedy populations * Corresponding author: luigi.dandrea@natucom.ch of prickly lettuce have already been found in the United States and in Australia (International Survey of Herbicide Resistant Weeds, http://www.weedscience.org/in.asp).…”

Section: Introductionmentioning

confidence: 99%

Hybridization rates between lettuce (Lactuca sativa) and its wild relative (L. serriola) under field conditions

D’Andrea

Felber

Guadagnuolo

2008

Environ. Biosafety Res.

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. Progeny was screened morphologically for detecting natural hybrids. Prior to the experiment, specific RAPD markers were used to confirm that morphological characters were reliable for hybrid identification. Hybridization occurred up to the maximal distance tested (40 m), and hybridization rates varied between 0 to 26%, decreasing with distance. More than 80% of the wild plants produced at least one hybrid (incidence of hybridization, IH) at 0 m and 1 m. It equaled 4 to 5% at 40 m. In sympatric crop-wild populations, cross-pollination between cultivated lettuce and its wild relative has to be seen as the rule rather than the exception for short distances.

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“…Material is also compared with herbarium specimens preserved in the herbarium collection of the Institute of Plant Sciences in Graz. Due to the diverse taxonomic treatments of Micromeria and Steptorhamphus genera a short taxonomic overview is given (BALL and GETLIFFE 1972;CHATER and GUINEA 1972;[ILI] 1979;DAVIS 1982;GREUTER et al 1986;WAGSTAFF et al 1995;PRATHER et al 2002;TRUSTY et al 2004;BRÄUCHLER et al 2005;KOOPMAN et al 1998;STEBBINS 1937;TUISL 1968;FERÁKOVA 1977;KILIJAN 2001;LEBEDA et al 2001LEBEDA et al , 2004. In order to avoid confusion with similar plants in our flora, some important morphometric features are specified, such as length of the flower and verticillaster peduncle (Micromeria) and the presence of an outer minute pappus row (Steptorhamphus).…”

Section: Methodsmentioning

confidence: 99%

“…Despite this, GREUTER et al (2008) included the genus Steptorhamphus into Lactuca. In the recent publications on the distribution and ecology of Lactuca species in Europe (LEBEDA et al 2001, LEBEDA et al, 2004, the taxon L. tuberosa Jacq. is not treated within this genera.…”

Section: Taxonomic Position Of Steptorhamphus Tuberosus (Jacq) Grosshmentioning

confidence: 99%

Shift of the western boundary of the distribution area of Micromeria cristata (Hampe) Griseb. and Steptorhamphus tuberosus (Jacq.) Grossh

Petrovic¹,

Stešević²

2011

Acta Botanica Croatica

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Shift of the western boundary of the distribution area of Micromeria cristata (Hampe) Griseb. and Steptorhamphus tuberosus (Jacq.) Grossh.DANKA PETROVI]*, DANIJELA STE [EVI] Biology Deptartment, Faculty of Natural Sciences and Mathematics, University of Montenegro, D`ord`a Va{ingtona bb, 81 000 Podgorica, Montenegro Abstract -During field investigations of Mt Rumija, two new taxa for the flora of Montenegro were recorded: Micromeria cristata (Hampe) Griseb. and Steptorhamphus tuberosus (Jacq.) Grossh. From the phytogeographic point of view these data indicate a change in the distribution area of both taxa, which have shifted to the west. A short overview of the taxonomic treatment of both genera is given.

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Geographical Distribution of Wild Lactuca Species (Asteraceae, Lactuceae)

Cited by 104 publications

References 23 publications

Evolution and Genetic Population Structure of Prickly Lettuce (Lactuca serriola) and Its RGC2 Resistance Gene Cluster

Evolution and Genetic Population Structure of Prickly Lettuce (Lactuca serriola) and Its RGC2 Resistance Gene Cluster

Hybridization rates between lettuce (Lactuca sativa) and its wild relative (L. serriola) under field conditions

Shift of the western boundary of the distribution area of Micromeria cristata (Hampe) Griseb. and Steptorhamphus tuberosus (Jacq.) Grossh

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