Cytogenetic studies onQuercusL. (Fagaceae) species belonging toIlexandCerrissection in Turkey

Yılmaz, Aykut; Uslu, Emel; Babaç, M. Tekin

doi:10.1080/00087114.2011.10589795

Cited by 10 publications

(9 citation statements)

References 16 publications

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“…Also The chromosome number of Quercus libani was given previously as mostly 2n=24 but also reported 2n= 22 (Fedorov 1974). The most important finding is that the result of chromosomes number analysis was compatible with findings reported in other Quercus species in Europe including Q. frainetto Ten, Q. trojana Webb, Q. macrolepis Kotschy, Q. cerris L, Q. crenata LAM, Q. coccifera L, Q. virgiliana Mill and Q. dalechampii Ten (Demerico et al 1995;Aykut et al 2011) which indicated that the fixed chromosome number of Quercus genus is 2n=24. It also shows that the basic chromosome number in this genus is x=12 so all species are diploid and generally polyploidy is more rare in this genus (Dzialuk et al 2007).…”

Section: Resultssupporting

confidence: 79%

Karyological and Chromosome Analysis of Quercus libani in Iran

Asgharpour¹,

Seyedi

Najafi³

2019

Yüzüncü Yıl Üniversitesi Tarım Bilimleri Dergisi

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This study attempts to analyze the karyotype and chromosome structure in five populations of Quercus libani growing in Northern Zagros. Pre-treatment, fixation, hydrolysis and staining were conducted using root meristem and then microscopic samples were prepared and studied. The results showed that in all studied cells of each population, the basic chromosome number was x=12 and all of them were diploid. Karyotype analysis of each population was conducted separately and several indices (TL:

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Section: Resultssupporting

confidence: 79%

Karyological and Chromosome Analysis of Quercus libani in Iran

Asgharpour¹,

Seyedi

Najafi³

2019

Yüzüncü Yıl Üniversitesi Tarım Bilimleri Dergisi

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“…Each resulting stack is referred to hereafter as a locus. As triploids and tetraploids are believed to be uncommon in oaks [26], [59], [60], any locus possessing more than 2 haplotypes within individuals after correcting for sequencing errors was discarded, under the assumption that it was composed in part of paralogous sequences (rather than only homologous sequences). For each individual, each locus is summarized into a consensus sequence, and these consensus sequences are then clustered among individuals to generate a data matrix for each locus.…”

Section: Methodsmentioning

confidence: 99%

A Framework Phylogeny of the American Oak Clade Based on Sequenced RAD Data

et al. 2014

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Previous phylogenetic studies in oaks (Quercus, Fagaceae) have failed to resolve the backbone topology of the genus with strong support. Here, we utilize next-generation sequencing of restriction-site associated DNA (RAD-Seq) to resolve a framework phylogeny of a predominantly American clade of oaks whose crown age is estimated at 23–33 million years old. Using a recently developed analytical pipeline for RAD-Seq phylogenetics, we created a concatenated matrix of 1.40 E06 aligned nucleotides, constituting 27,727 sequence clusters. RAD-Seq data were readily combined across runs, with no difference in phylogenetic placement between technical replicates, which overlapped by only 43–64% in locus coverage. 17% (4,715) of the loci we analyzed could be mapped with high confidence to one or more expressed sequence tags in NCBI Genbank. A concatenated matrix of the loci that BLAST to at least one EST sequence provides approximately half as many variable or parsimony-informative characters as equal-sized datasets from the non-EST loci. The EST-associated matrix is more complete (fewer missing loci) and has slightly lower homoplasy than non-EST subsampled matrices of the same size, but there is no difference in phylogenetic support or relative attribution of base substitutions to internal versus terminal branches of the phylogeny. We introduce a partitioned RAD visualization method (implemented in the R package RADami; http://cran.r-project.org/web/packages/RADami) to investigate the possibility that suboptimal topologies supported by large numbers of loci—due, for example, to reticulate evolution or lineage sorting—are masked by the globally optimal tree. We find no evidence for strongly-supported alternative topologies in our study, suggesting that the phylogeny we recover is a robust estimate of large-scale phylogenetic patterns in the American oak clade. Our study is one of the first to demonstrate the utility of RAD-Seq data for inferring phylogeny in a 23–33 million year-old clade.

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“…Somatic metaphase chromosomes of the investigated Quercus species were very small and similar with a diploid chromosome number 2n = 24 (Table 2, Figures 1 and 2). Chromosome analyses of 16 Quercus species existing in Turkey has been therefore completed and it is confirmed that the 2n = 24 chromosome number is typical of the genus (Table 3) (Aykut et al 2008(Aykut et al , 2011Yilmaz 2017). These results are in agreement with previous studies based on chromosome number of the genus Quercus from different species and different parts of the world (Ohri and Ahuja 1990;D'emerico et al 1995, D'emerico et al 2000Zoldos et al 1998;Kurokawa and Yonezawa 2004).…”

Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

“…Chromosome analyses of all species from the section Ilex in Turkey have been completed in a previous study (Aykut et al 2011). Together with the present study, the karyotypes of all species of section Quercus and Cerris are made available, except Q. pontica from section Quercus and Q. brantii from section Cerris (Aykut et al 2008(Aykut et al , 2011Yılmaz 2017). The cytological analysis of the 16 oak taxa from three section occurring in Turkey will increase the available knowledge on Quercus biology, contribute to assessing taxonomic relationships with the Eurasian species, and facilitate further studies on oak chromosome structure, function and activity.…”

Section: Introductionmentioning

confidence: 99%

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Karyomorphology of someQuercusL. species from sectionQuercusandCerrisin Turkey

Yılmaz

2018

Caryologia

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Detailed karyotypic investigation of five species (Q. hartwissiana Steven., Q. frainetto Ten., Q. macranthera subsp. syspirensis (C. Koch.) Menitsky, Q. virgiliana Ten., and Q. trojana Webb) belonging to the genus Quercus was carried out in order to contribute to the taxonomic relationships of the genus. The somatic chromosome number was found to be 2n = 24 in all taxa examined. Q. hartwissiana, Q. frainetto and Q. macranthera subsp. syspirensis showed similar karyotypes, consisting of 22 metacentric and 2 submetacentric chromosomes. The karyotype of Q. virgiliana included all metacentric chromosomes and finally Q. trojana showed the highest variation according to karyotypic description (14 m + 10 sm), haploid complement and other morphometric parameters. The study results showed similarity with previous reports in Turkey, different to European oaks.

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Cytogenetic studies onQuercusL. (Fagaceae) species belonging toIlexandCerrissection in Turkey

Cited by 10 publications

References 16 publications

Karyological and Chromosome Analysis of Quercus libani in Iran

Karyological and Chromosome Analysis of Quercus libani in Iran

A Framework Phylogeny of the American Oak Clade Based on Sequenced RAD Data

Karyomorphology of someQuercusL. species from sectionQuercusandCerrisin Turkey

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