Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation
Rice genetic diversity partitioning between farms, varieties and, within-variety diversity, were analysed in two villages of Maritime Guinea with contrasted agroecological conditions. One thousand and two hundred individual plants belonging to 45 accessions collected in eight farms were genotyped using 10 SSR markers. The molecular variance was evenly shared between and within accessions, while the farm effect was almost nil. Local varieties had a multi-line genetic structure. The number of multilocus genotypes was proportional to the utilisation rate of the variety in the village. The F ST values between different accessions of each variety were significant which indicated low genetic consistency in the variety names. This varietal structure could mainly be explained by the migration phenomenon and the high varietal turnover. Compared to allelic diversity, multilocus genotypic diversity seemed to be the most suitable indicator of the quantitative distribution of diversity at different management scales (accession, farm and village). The within- and between-farm F ST values were in the same order of magnitude. The within-farm diversity was not farm-specific but quantitatively high, i.e. up to 50% of the total genotypic diversity of a given village. Given the relative importance of the within-variety diversity, the in situ approach stands out as the most effective solution. As farms do not host specific diversity the in situ approach could be implemented by working with a small number of farms.
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Language: | eng |
Subjects: | F30 - Génétique et amélioration des plantes, F70 - Taxonomie végétale et phytogéographie, Oryza, Oryza sativa, Oryza glaberrima, conservation du matériel génétique, variété, marqueur génétique, variation génétique, biodiversité, microsatellite, génotype, http://aims.fao.org/aos/agrovoc/c_5435, http://aims.fao.org/aos/agrovoc/c_5438, http://aims.fao.org/aos/agrovoc/c_5436, http://aims.fao.org/aos/agrovoc/c_3250, http://aims.fao.org/aos/agrovoc/c_8157, http://aims.fao.org/aos/agrovoc/c_24030, http://aims.fao.org/aos/agrovoc/c_15975, http://aims.fao.org/aos/agrovoc/c_33949, http://aims.fao.org/aos/agrovoc/c_36574, http://aims.fao.org/aos/agrovoc/c_3225, http://aims.fao.org/aos/agrovoc/c_3423, |
Online Access: | http://agritrop.cirad.fr/542876/ http://agritrop.cirad.fr/542876/1/542876.pdf |
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dig-cirad-fr-5428762024-01-28T15:33:23Z http://agritrop.cirad.fr/542876/ http://agritrop.cirad.fr/542876/ Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation. Barry Mamadou Billo, Pham Jean Louis, Courtois Brigitte, Billot Claire, Ahmadi Nourollah. 2007. Genetic Resources and Crop Evolution, 54 : 1675-1690.https://doi.org/10.1007/s10722-006-9176-3 <https://doi.org/10.1007/s10722-006-9176-3> Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation Barry, Mamadou Billo Pham, Jean Louis Courtois, Brigitte Billot, Claire Ahmadi, Nourollah eng 2007 Genetic Resources and Crop Evolution F30 - Génétique et amélioration des plantes F70 - Taxonomie végétale et phytogéographie Oryza Oryza sativa Oryza glaberrima conservation du matériel génétique variété marqueur génétique variation génétique biodiversité microsatellite génotype http://aims.fao.org/aos/agrovoc/c_5435 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_5436 http://aims.fao.org/aos/agrovoc/c_3250 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_3225 Guinée http://aims.fao.org/aos/agrovoc/c_3423 Rice genetic diversity partitioning between farms, varieties and, within-variety diversity, were analysed in two villages of Maritime Guinea with contrasted agroecological conditions. One thousand and two hundred individual plants belonging to 45 accessions collected in eight farms were genotyped using 10 SSR markers. The molecular variance was evenly shared between and within accessions, while the farm effect was almost nil. Local varieties had a multi-line genetic structure. The number of multilocus genotypes was proportional to the utilisation rate of the variety in the village. The F ST values between different accessions of each variety were significant which indicated low genetic consistency in the variety names. This varietal structure could mainly be explained by the migration phenomenon and the high varietal turnover. Compared to allelic diversity, multilocus genotypic diversity seemed to be the most suitable indicator of the quantitative distribution of diversity at different management scales (accession, farm and village). The within- and between-farm F ST values were in the same order of magnitude. The within-farm diversity was not farm-specific but quantitatively high, i.e. up to 50% of the total genotypic diversity of a given village. Given the relative importance of the within-variety diversity, the in situ approach stands out as the most effective solution. As farms do not host specific diversity the in situ approach could be implemented by working with a small number of farms. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/542876/1/542876.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1007/s10722-006-9176-3 10.1007/s10722-006-9176-3 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=177794 info:eu-repo/semantics/altIdentifier/doi/10.1007/s10722-006-9176-3 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1007/s10722-006-9176-3 |
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F30 - Génétique et amélioration des plantes F70 - Taxonomie végétale et phytogéographie Oryza Oryza sativa Oryza glaberrima conservation du matériel génétique variété marqueur génétique variation génétique biodiversité microsatellite génotype http://aims.fao.org/aos/agrovoc/c_5435 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_5436 http://aims.fao.org/aos/agrovoc/c_3250 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_3225 http://aims.fao.org/aos/agrovoc/c_3423 F30 - Génétique et amélioration des plantes F70 - Taxonomie végétale et phytogéographie Oryza Oryza sativa Oryza glaberrima conservation du matériel génétique variété marqueur génétique variation génétique biodiversité microsatellite génotype http://aims.fao.org/aos/agrovoc/c_5435 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_5436 http://aims.fao.org/aos/agrovoc/c_3250 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_3225 http://aims.fao.org/aos/agrovoc/c_3423 |
spellingShingle |
F30 - Génétique et amélioration des plantes F70 - Taxonomie végétale et phytogéographie Oryza Oryza sativa Oryza glaberrima conservation du matériel génétique variété marqueur génétique variation génétique biodiversité microsatellite génotype http://aims.fao.org/aos/agrovoc/c_5435 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_5436 http://aims.fao.org/aos/agrovoc/c_3250 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_3225 http://aims.fao.org/aos/agrovoc/c_3423 F30 - Génétique et amélioration des plantes F70 - Taxonomie végétale et phytogéographie Oryza Oryza sativa Oryza glaberrima conservation du matériel génétique variété marqueur génétique variation génétique biodiversité microsatellite génotype http://aims.fao.org/aos/agrovoc/c_5435 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_5436 http://aims.fao.org/aos/agrovoc/c_3250 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_3225 http://aims.fao.org/aos/agrovoc/c_3423 Barry, Mamadou Billo Pham, Jean Louis Courtois, Brigitte Billot, Claire Ahmadi, Nourollah Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation |
description |
Rice genetic diversity partitioning between farms, varieties and, within-variety diversity, were analysed in two villages of Maritime Guinea with contrasted agroecological conditions. One thousand and two hundred individual plants belonging to 45 accessions collected in eight farms were genotyped using 10 SSR markers. The molecular variance was evenly shared between and within accessions, while the farm effect was almost nil. Local varieties had a multi-line genetic structure. The number of multilocus genotypes was proportional to the utilisation rate of the variety in the village. The F ST values between different accessions of each variety were significant which indicated low genetic consistency in the variety names. This varietal structure could mainly be explained by the migration phenomenon and the high varietal turnover. Compared to allelic diversity, multilocus genotypic diversity seemed to be the most suitable indicator of the quantitative distribution of diversity at different management scales (accession, farm and village). The within- and between-farm F ST values were in the same order of magnitude. The within-farm diversity was not farm-specific but quantitatively high, i.e. up to 50% of the total genotypic diversity of a given village. Given the relative importance of the within-variety diversity, the in situ approach stands out as the most effective solution. As farms do not host specific diversity the in situ approach could be implemented by working with a small number of farms. |
format |
article |
topic_facet |
F30 - Génétique et amélioration des plantes F70 - Taxonomie végétale et phytogéographie Oryza Oryza sativa Oryza glaberrima conservation du matériel génétique variété marqueur génétique variation génétique biodiversité microsatellite génotype http://aims.fao.org/aos/agrovoc/c_5435 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_5436 http://aims.fao.org/aos/agrovoc/c_3250 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_3225 http://aims.fao.org/aos/agrovoc/c_3423 |
author |
Barry, Mamadou Billo Pham, Jean Louis Courtois, Brigitte Billot, Claire Ahmadi, Nourollah |
author_facet |
Barry, Mamadou Billo Pham, Jean Louis Courtois, Brigitte Billot, Claire Ahmadi, Nourollah |
author_sort |
Barry, Mamadou Billo |
title |
Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation |
title_short |
Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation |
title_full |
Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation |
title_fullStr |
Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation |
title_full_unstemmed |
Rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation |
title_sort |
rice genetic diversity at farm and village levels and genetic structure of local varieties reveal need for in situ conservation |
url |
http://agritrop.cirad.fr/542876/ http://agritrop.cirad.fr/542876/1/542876.pdf |
work_keys_str_mv |
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_version_ |
1792496774132269056 |