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| Content Provider | Springer Nature Link |
|---|---|
| Author | Mercati, F. Catarcione, G. Paolacci, A. R. Abenavoli, M. R. Sunseri, F. Ciaffi, M. |
| Copyright Year | 2015 |
| Abstract | The landraces are considered important sources of valuable germplasm for breeding activities to face climatic changes as well as to satisfy the requirement of new varieties for marginal areas. Runner bean (Phaseolus coccineus L.) is one of the most cultivated Phaseolus species worldwide, but few studies have been addressed to assess the genetic diversity and structure within and among landrace populations. In the present study, 20 different populations of a runner bean landrace from Central Italy named “Fagiolone,” together with 41 accessions from Italy and Mesoamerica, were evaluated by using 14 nuclear SSRs to establish its genetic structure and distinctiveness. Results indicated that “Fagiolone” landrace can be considered as a dynamic evolving open-pollinated population that shows a significant level of genetic variation, mostly detected within populations, and the presence of two main genetic groups, of which one distinguished from other Italian runner bean landraces. Results highlighted also a relevant importance of farmers’ management practices able to influence the genetic structure of this landrace, in particular the seed exchanges and selection, and the past introduction in cultivation of landraces/cultivars similar to seed morphology, but genetically rather far from “Fagiolone.” The most suitable on-farm strategies for seed collection, conservation and multiplication will be defined based on our results, as a model for threatened populations of other allogamous crop species. STRUCTURE and phylogenetic analyses indicated that Mesoamerican accessions and Italian landraces belong to two distinct gene pools confirming the hypothesis that Europe could be considered a secondary diversification center for P. coccineus. |
| Starting Page | 473 |
| Ending Page | 485 |
| Page Count | 13 |
| File Format | |
| ISSN | 00166707 |
| Journal | Genetica |
| Volume Number | 143 |
| Issue Number | 4 |
| e-ISSN | 15736857 |
| Language | English |
| Publisher | Springer International Publishing |
| Publisher Date | 2015-06-03 |
| Publisher Place | Cham |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Genetic variability Genetic resources Landrace distinctiveness Linkage disequilibrium Simple sequence repeat—SSR Open-pollinated population Life Sciences Animal Genetics and Genomics Plant Genetics & Genomics Human Genetics Microbial Genetics and Genomics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science Medicine Animal Science and Zoology Insect Science |
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