| Title |
The origin of intermediate species of the genus Sorbus
|
|---|---|
| Published in |
Theoretical and Applied Genetics, June 2002
|
| DOI | 10.1007/s00122-002-0957-6 |
| Pubmed ID | |
| Authors |
E. Nelson-Jones, D. Briggs, A. Smith |
| Abstract |
The genus Sorbus in Europe contains five diploid species, Sorbus aria, Sorbus aucuparia, Sorbus torminalis, Sorbus chamaemespilus and Sorbus domestica, classified into five different subgenera. The subgenus Aria (or the S. aria aggregate) contains apomictic triploid and tetraploid species. Within the genus there are, in addition, a number of species, morphologically intermediate between plants of the four main subgenera, which are considered to reproduce partly, or exclusively, by apomixis. These are believed to have originated by hybridisation between species in the S. aria aggregate and a species from another subgenus (either S. aucuparia, S. torminalis or S. chamaemespilus). We have used restriction fragment length polymorphism (RFLP) analysis on a total of 178 Sorbus accessions to test this model. The genome relationships of the different groups have been assessed, and the hybrid nature of the major intermediate groups is unequivocally demonstrated. Polyploid species in the S. aria aggregate show genetic variation, indicating the possibility of multiple origins and/or facultative apomictic breeding behaviour. A major finding, confirmed by microsatellite analysis, is that the 'intermediate' species S. intermedia is shown to have genomes from S aria, S aucuparia and S torminalis. Polymorphic mitochondrial DNA markers were used to determine the direction of the crosses that gave rise to new 'hybrid species'; in the majority of cases the pollen was provided by the parent from the S aria aggregate. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 79 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Turkey | 1 | 1% |
| United States | 1 | 1% |
| Germany | 1 | 1% |
| Romania | 1 | 1% |
| Unknown | 75 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 19 | 24% |
| Student > Ph. D. Student | 10 | 13% |
| Student > Bachelor | 7 | 9% |
| Student > Postgraduate | 6 | 8% |
| Student > Doctoral Student | 5 | 6% |
| Other | 17 | 22% |
| Unknown | 15 | 19% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 41 | 52% |
| Environmental Science | 9 | 11% |
| Biochemistry, Genetics and Molecular Biology | 6 | 8% |
| Pharmacology, Toxicology and Pharmaceutical Science | 2 | 3% |
| Unspecified | 1 | 1% |
| Other | 3 | 4% |
| Unknown | 17 | 22% |
Attention Score in Context
This research output has an Altmetric Attention Score of 4. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 04 July 2021.
All research outputs
#7,356,343
of 25,374,917 outputs
Outputs from Theoretical and Applied Genetics
#1,320
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Outputs of similar age
#15,182
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Outputs of similar age from Theoretical and Applied Genetics
#7
of 31 outputs
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