Sequence divergence at the putative flowering time locus COL1 in Brassicaceae

Shavorskaya, Oksana; Lagercrantz, Ulf

doi:10.1016/j.ympev.2006.01.013

Cited by 4 publications

(5 citation statements)

References 48 publications

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“…Most probably the divergence of two COL1 loci preceded Solanum speciation. Similar conclusion was also reached on the basis of MR structures in the Brassicaceae (Shavorskaya and Lagercrantz, 2006).…”

Section: Two Variants Of Mr In Solanum Col Genessupporting

confidence: 82%

“…The crucial locus could reside in the non-coding sequence of the gene. Alternatively, a COL1 regulator or another quite independent gene would be located beyond COL1 sequence, in cis or trans (Shavorskaya and Lagercrantz, 2006). Recent studies of potato and tobacco (Rutitzky et al, 2009) and the range of Arabidopsis genotypes (Giakountis et al, 2010) provide convincing evidence that genes other than COL may run the photoperiodic control of development.…”

Section: Are Col1 Variants In Solanum the Functional Orthologues Of Amentioning

confidence: 99%

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The structure of two CONSTANS-LIKE1 genes in potato and its wild relatives

Drobyazina

Хавкин

2011

Gene

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Section: Two Variants Of Mr In Solanum Col Genessupporting

confidence: 82%

Section: Are Col1 Variants In Solanum the Functional Orthologues Of Amentioning

confidence: 99%

The structure of two CONSTANS-LIKE1 genes in potato and its wild relatives

Drobyazina

Хавкин

2011

Gene

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“…Although genomic repatterning and gene expression changes are more extensive in studies of allopolyploids, we have only limited information about how the extent of change depends on the genetic distance between the parental genomes. It may be that the changes in expression observed are particularly dramatic when the allopolyploids studied involve very divergent genomes (e.g., 7.5 million years [MY] in the case of the cotton studied by Adams et al, 2003;11 MY between the Brassica rapa and B. nigra studied by Song et al, 1995, as estimated by Shavorskaya and Lagercrantz, 2006). Indeed, Song et al (1995) observed that less extensive genomic rearrangements occurred in the allopolyploid formed from the more closely related B. rapa and B. oleracea (separated by ~6 MY, based on Figure 1 of Shavorskaya and Lagercrantz, 2006).…”

Section: Immediate Effects Of Polyploidizationmentioning

confidence: 99%

“…It may be that the changes in expression observed are particularly dramatic when the allopolyploids studied involve very divergent genomes (e.g., 7.5 million years [MY] in the case of the cotton studied by Adams et al, 2003;11 MY between the Brassica rapa and B. nigra studied by Song et al, 1995, as estimated by Shavorskaya and Lagercrantz, 2006). Indeed, Song et al (1995) observed that less extensive genomic rearrangements occurred in the allopolyploid formed from the more closely related B. rapa and B. oleracea (separated by ~6 MY, based on Figure 1 of Shavorskaya and Lagercrantz, 2006). There remains a need to explore how the extent of genomic repatterning and changes in gene expression depend on the divergence between the parental genomes.…”

Section: Immediate Effects Of Polyploidizationmentioning

confidence: 99%

The Evolutionary Consequences of Polyploidy

Otto

2007

Cell

1,038

883

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Polyploidization, the addition of a complete set of chromosomes to the genome, represents one of the most dramatic mutations known to occur. Nevertheless, polyploidy is well tolerated in many groups of eukaryotes. Indeed, the majority of flowering plants and vertebrates have descended from polyploid ancestors. This Review examines the short-term effects of polyploidization on cell size, body size, genomic stability, and gene expression and the long-term effects on rates of evolution.

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“…The genomic sequence of SaCO contained a single 196‐bp intron at a similar position to AtCO (Figure S1a in Supporting Information). The genomic sequence of SaCO (GenBank accession ) differed from a CO ‐ LIKE1 gene that was previously cloned from Sinapis (Shavorskaya and Lagercrantz, 2006); the distinct features were the intron in SaCO (absent in SaCOL1 ) and an 18‐bp deletion in SaCOL1 (absent in SaCO ).…”

Section: Resultsmentioning

confidence: 99%

Gene activation cascade triggered by a single photoperiodic cycle inducing flowering in Sinapis alba

et al. 2009

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SUMMARYMolecular genetic analyses in Arabidopsis disclosed a genetic pathway whereby flowering is induced by the photoperiod. This cascade is examined here within the time course of floral transition in the long-day (LD) plant Sinapis alba induced by a single photoperiodic cycle. In addition to previously available sequences, the cloning of CONSTANS (SaCO) and FLOWERING LOCUS T (SaFT) homologues allowed expression analyses to be performed to follow the flowering process step by step. A diurnal rhythm in SaCO expression in the leaves was observed and transcripts of SaFT were detected when light was given in phase with SaCO kinetics only. This occurred when day length was extended or when a short day was shifted towards a 'photophile phase'. The steady-state level of SaFT transcripts in the various physiological situations examined was found to correlate like a rheostat with floral induction strength. Kinetics of SaFT activation were also consistent with previous estimations of translocation of florigen out of leaves, which could actually occur after the inductive cycle. In response to one 22-h LD, initiation of floral meristems by the shoot apical meristem (SAM) started about 2 days after activation of SaFT and was marked by expression of APETALA1 (SaAP1). Meanwhile, LEAFY (SaLFY) was first up-regulated in leaf primordia and in the SAM. FRUITFULL (SaFUL) was later activated in the whole SAM but excluded from floral meristems. These patterns are integrated with previous observations concerning upregulation of SUPPRESSOR OF OVEREXPRESSION OF CO1 (SaSOC1) to provide a temporal and spatial map of floral transition in Sinapis.

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Sequence divergence at the putative flowering time locus COL1 in Brassicaceae

Cited by 4 publications

References 48 publications

The structure of two CONSTANS-LIKE1 genes in potato and its wild relatives

The structure of two CONSTANS-LIKE1 genes in potato and its wild relatives

The Evolutionary Consequences of Polyploidy

Gene activation cascade triggered by a single photoperiodic cycle inducing flowering in Sinapis alba

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