Genetic Diversity and Structure of the Portuguese Pear (Pyrus communis L.) Germplasm
A rich heritage of traditional pear varieties is kept in national Portuguese collections. Out of these varieties, “Rocha” dominates national pear production. Although a noticeable phenotypic variation among clones of this variety has been reported, little is known about its genetic variability, as t...
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| Veröffentlicht in: | Sustainability 2019-10, Vol.11 (19), p.5340 |
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| creator | Queiroz, Álvaro Bagoin Guimarães, Joana Sánchez, Claudia Simões, Fernanda Maia de Sousa, Rui Viegas, Wanda Veloso, Maria Manuela |
| description | A rich heritage of traditional pear varieties is kept in national Portuguese collections. Out of these varieties, “Rocha” dominates national pear production. Although a noticeable phenotypic variation among clones of this variety has been reported, little is known about its genetic variability, as to date molecular studies have been performed on a single “Rocha” clone. Eleven Simple Sequence Repeats (SSR) markers were used to assess the genetic diversity of 130 local cultivars, 80 of them being “Rocha” clones. The results allowed the differentiation of 75 genotypes of which 29 are “Rocha”. Three synonyms groups and four homonymous groups of other local varieties were confirmed. A Bayesian model-based clustering approach identified two distinct clusters. Using flow cytometry, six cultivars were found to be triploids. These results show high genetic variability among “Rocha” clones. In conclusion, there is a need for different “Rocha” clones to be preserved to enable the correct selection of the multiplication material. |
| doi_str_mv | 10.3390/su11195340 |
| format | Article |
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Eleven Simple Sequence Repeats (SSR) markers were used to assess the genetic diversity of 130 local cultivars, 80 of them being “Rocha” clones. The results allowed the differentiation of 75 genotypes of which 29 are “Rocha”. Three synonyms groups and four homonymous groups of other local varieties were confirmed. A Bayesian model-based clustering approach identified two distinct clusters. Using flow cytometry, six cultivars were found to be triploids. These results show high genetic variability among “Rocha” clones. 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| subjects | Bayesian analysis Cloning Clustering Cultivars Data analysis Deoxyribonucleic acid DNA Flow cytometry Fruits Genetic diversity Genetic variability Genomes Genotypes Germplasm Multiplication Phenotypic variations Polyploidy Simple sequence repeats Software Sustainability |
| title | Genetic Diversity and Structure of the Portuguese Pear (Pyrus communis L.) Germplasm |
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