Cryptic Repeated Genomic Recombination During Speciation in Gossypium Gossypioides

Cronn, Richard; Small, Randall L.; Haselkorn, Tamara S.; Wendel, Jonathan F.

doi:10.1554/02-705

Cited by 20 publications

(31 citation statements)

References 56 publications

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“…The remaining subsections are in most cases, paraphyletic; however, section Houzingenia is monophyletic in the present study [contra (Alvarez et al 2005)]. The differences between the present data and those previously reported are likely attributable to both rapid radiation and hybridization/introgression at the base of the D-genome cottons, which makes phylogenetic reconstruction with strong support less probable (Alvarez et al 2005;Cronn et al 2003). The aim of the present study, however, was not to resolve relationships among D-genome species, but instead to test the hypothesis of a monophyletic origin of the polyploid species.…”

Section: Phylogenetic Inferences Of Monophylycontrasting

confidence: 80%

Assessing the monophyly of polyploid Gossypium species

et al. 2012

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The origin and monophyly of the polyploid cotton (Gossypium) species has been largely accepted, despite the lack of explicit phylogenetic evidence. Recent studies in other polyploid systems have demonstrated that multiple origins for polyploid species are much more common than once thought, raising the possibility that Gossypium polyploids also had multiple origins, as postulated by some authors. To test the monophyly of polyploid cotton, we sequenced a 2.8-kb intergenic region from all diploid species belonging to the genome groups from which the polyploid originates. The resulting phylogenetic analyses strongly support a single origin of polyploid cotton involving a D-genome ancestor related to Gossypium raimondii and an A-genome ancestor that was sister to both extant A-genome species.

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Section: Phylogenetic Inferences Of Monophylycontrasting

confidence: 80%

Assessing the monophyly of polyploid Gossypium species

et al. 2012

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“…Thirteen species of D genome containing six subsections, have received considerable phylogenetic attentions [30,38–40], but evolutionary relationships among these subsections still have not enough evidence [24]. Some evolutionary evidences could be obtained from the rDNA patterns which were revealed both conserved and changeable in ten species of six subsections studied here.…”

Section: Discussionmentioning

confidence: 84%

Chromosomal Locations of 5S and 45S rDNA in Gossypium Genus and Its Phylogenetic Implications Revealed by FISH

et al. 2013

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We investigated the locations of 5S and 45S rDNA in Gossypium diploid A, B, D, E, F, G genomes and tetraploid genome (AD) using multi-probe fluorescent in situ hybridization (FISH) for evolution analysis in Gossypium genus. The rDNA numbers and sizes, and synteny relationships between 5S and 45S were revealed using 5S and 45S as double-probe for all species, and the rDNA-bearing chromosomes were identified for A, D and AD genomes with one more probe that is single-chromosome-specific BAC clone from G. hirsutum (A1D1). Two to four 45S and one 5S loci were found in diploid-species except two 5S loci in G . incanum (E4), the same as that in tetraploid species. The 45S on the 7th and 9th chromosomes and the 5S on the 9th chromosomes seemed to be conserved in A, D and AD genomes. In the species of B, E, F and G genomes, the rDNA numbers, sizes, and synteny relationships were first reported in this paper. The rDNA pattern agrees with previously reported phylogenetic history with some disagreements. Combined with the whole-genome sequencing data from G . raimondii (D5) and the conserved cotton karyotype, it is suggested that the expansion, decrease and transposition of rDNA other than chromosome rearrangements might occur during the Gossypium evolution.

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“…was compiled using these new sequences, plus complete ndhF sequence data available for Malvaceae s.l. from GenBank Whitlock et al 2001;Whitlock et al 2003;Nyffeler and Baum 2000;Pfeil et al 2002;Seelanan et al 1997;Cronn et al 2003;Small 2004), and the outgroups Muntingia L., Rhopalocarpus Bojer, and Cochlospermum Kunth. The outgroups were chosen because they were determined to belong to the expanded Malvales, but are clearly placed outside Malvaceae s.l.…”

Section: Methodsmentioning

confidence: 99%