Studies in Festuca. II. Fertility relationships between species of sections bovinae and scariosae, and their affinities with Lolium

Chandrasekharan, P.; Lewis, E. J.; Borrill, Martin

doi:10.1007/bf00156133

Cited by 24 publications

(22 citation statements)

References 10 publications

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“…glaucescens (4x) and the hexaploid varieties of F. arundinacea. The results of Chandrasekharan et a!., (1972) support the view that the Moroccan fescues are more closely related among themselves than to fescues from other regions. This contradicts the traditional classification of the three Moroccan types in which F. arundinacea var.…”

Section: Methodssupporting

confidence: 72%

“…arundinacea (6x) Chandrasekharan and Thomas (1971a) proposed, on the basis of morphological data, that F. arundinacea var. glaucescens (4x) and F. pratensis (2x) were the progenitors of the hexaploid F. arundinacea.…”

Section: Methodsmentioning

confidence: 99%

“…The Thomas (1971a and1971b). Borrill (1972), on morphological grounds, suggested that the three Moroccan polyploids had each incorporated at least one genome from the diploid F. scariosa.…”

Section: Methodsmentioning

confidence: 99%

“…Information contributing to an understanding of species relationships within the genus would be of use to breeders wishing to incorporate the desirable characteristics of many wild species into the agronomically important varieties (Chandrasekharan and Thomas, 1971a).…”

Section: Introductionmentioning

confidence: 99%

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DNA variation in Festuca

Seal

1983

Heredity

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SUMMARYThere is substantial interspecific variation in nuclear DNA content in Festuca much of which cannot be accounted for by variation in chromosome number.The distribution of species DNA contents closely matches the taxonomic divisions within the genus. Polyploid taxa, especially high polyploids, tend to have less DNA than expected.(a) There may be errors in the proposed modes of origin of polyploid forms. In particular, the distinction between European and Moroccan forms may have been underestimated, and/or (b) polyploid species may have undergone a reduction in nuclear DNA content since their divergence, relative to their progenitor species of lower ploidy.

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Section: Methodssupporting

confidence: 72%

Section: Methodsmentioning

confidence: 99%

“…The Thomas (1971a and1971b). Borrill (1972), on morphological grounds, suggested that the three Moroccan polyploids had each incorporated at least one genome from the diploid F. scariosa.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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DNA variation in Festuca

Seal

1983

Heredity

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“…fenas, which were fertile and morphologically close to F. arundinacea subsp. atlantigena (Chandrasekharan & Thomas, 1971). Similarly, Charmet & al.…”

Section: In Search Of the Ancestry Of Polyploid Speciesmentioning

confidence: 96%

Cytogenetic relationships within the Maghrebian clade of <em>Festuca</em> subgen. <em>Schedonorus</em> (Poaceae), using flow cytometry and FISH

Ezquerro-López

Kopecký

Inda

2017

Anal. Jard. Bot. Madr.

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Festuca subgen. Schedonorus is a group of broad-leaved fescues, which can be divided into two clades: European and Maghrebian. We employed fluorescent in situ hybridization —FISH— with probes specific for 5S and 35S ribosomal DNA and genome size estimation using flow cytometry to shed light on the determination of possible parental genomes of polyploid species of the Maghrebian clade. Our results indicate that octoploid F. arundinacea subsp. atlantigena probably originated from crossing of the tetraploids F. arundinacea subsp. fenas —2n = 4x = 28— and F. mairei —2n = 4x = 28— followed by whole genome duplication. However, a large reconstruction of karyotype and genome downsizing has been revealed. Similarly, hexaploid F. arundinacea subsp. corsica presumably resulted from the interspecific hybridization of the diploid F. pratensis and tetraploid F. arundinacea subsp. fenas. Several scenarios on the origin of decaploid F. arundinacea var. letourneuxiana are discussed. This study contributed to our knowledge on the phylogeny of broad-leaved fescues and provided new information on the karyotypes —chromosome numbers, ploidy levels and numbers and positions of rDNA loci— using FISH and genome size estimations using flow cytometry in selected taxa of this important grass genus.

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