Genetic diversity and population dynamics of weedy rice in France
Weedy rices have long been known, particularly in tropical areas, as the result of introgressions between wild and cultivated forms. More recently, new weedy forms in temperate regions where wild forms were never reported have invaded rice fields. These plants show many traits similar to true wild O. rufipogon (shattering, dormancy, awning, organ pigmentation). Their occurrence concerns many parts of the world practising intensive rice growing with direct seeding. Samples of weeds from France have been analysed with 15 microsatellite markers in comparison to a representative collection of 145 Asian rice varieties. Diversity of weedy rice is in agreement with the genetic structure of O. sativa separated in two main indica and japonica groups of varieties, Weeds from France showed a greater diversity than local Mediterranean varieties (temperate japonica) as well as original alleles or alleles more typical of indica varieties. Genetic structure of weed stands appeared more probably the consequence of a predominantly independent population dynamics allowed by seed conservation and dissemination and not the result of gene flow with varieties from which they are isolated by a much greater earliness. Results suggested that distant crosses between indica and japonica varieties and their possible effects on genome expression could be also a relevant explanation to weed origin.
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Subjects: | F30 - Génétique et amélioration des plantes, H60 - Mauvaises herbes et désherbage, Oryza sativa, variation génétique, mauvaise herbe, zone tempérée, microsatellite, marqueur génétique, génome, http://aims.fao.org/aos/agrovoc/c_5438, http://aims.fao.org/aos/agrovoc/c_15975, http://aims.fao.org/aos/agrovoc/c_8347, http://aims.fao.org/aos/agrovoc/c_7656, http://aims.fao.org/aos/agrovoc/c_36574, http://aims.fao.org/aos/agrovoc/c_24030, http://aims.fao.org/aos/agrovoc/c_3224, http://aims.fao.org/aos/agrovoc/c_3081, |
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dig-cirad-fr-5101452024-01-28T10:47:14Z http://agritrop.cirad.fr/510145/ http://agritrop.cirad.fr/510145/ Genetic diversity and population dynamics of weedy rice in France. Bres-Patry Cécile, Bangratz Martine, Ghesquière Alain. 2002. In : Rice genetic resources and breeding for Europe and other temperate areas : proceedings of Eurorice 2001 Symposium, Cirad, Ird, Ksau, Krasnodar Territory, Vniirisa, September, 3-8, 2001, Krasnodar, Russia. CIRAD, IRD, KSAU, Krasnodar. Montpellier : CIRAD ISBN 2-87614-504-9 Eurorice 2001 Symposium, Krasnodar, Russie, 3 Septembre 2001/8 Septembre 2001. Genetic diversity and population dynamics of weedy rice in France Bres-Patry, Cécile Bangratz, Martine Ghesquière, Alain eng 2002 CIRAD Rice genetic resources and breeding for Europe and other temperate areas : proceedings of Eurorice 2001 Symposium, Cirad, Ird, Ksau, Krasnodar Territory, Vniirisa, September, 3-8, 2001, Krasnodar, Russia F30 - Génétique et amélioration des plantes H60 - Mauvaises herbes et désherbage Oryza sativa variation génétique mauvaise herbe zone tempérée microsatellite marqueur génétique génome http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_8347 http://aims.fao.org/aos/agrovoc/c_7656 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_3224 France http://aims.fao.org/aos/agrovoc/c_3081 Weedy rices have long been known, particularly in tropical areas, as the result of introgressions between wild and cultivated forms. More recently, new weedy forms in temperate regions where wild forms were never reported have invaded rice fields. These plants show many traits similar to true wild O. rufipogon (shattering, dormancy, awning, organ pigmentation). Their occurrence concerns many parts of the world practising intensive rice growing with direct seeding. Samples of weeds from France have been analysed with 15 microsatellite markers in comparison to a representative collection of 145 Asian rice varieties. Diversity of weedy rice is in agreement with the genetic structure of O. sativa separated in two main indica and japonica groups of varieties, Weeds from France showed a greater diversity than local Mediterranean varieties (temperate japonica) as well as original alleles or alleles more typical of indica varieties. Genetic structure of weed stands appeared more probably the consequence of a predominantly independent population dynamics allowed by seed conservation and dissemination and not the result of gene flow with varieties from which they are isolated by a much greater earliness. Results suggested that distant crosses between indica and japonica varieties and their possible effects on genome expression could be also a relevant explanation to weed origin. conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/closedAccess http://agritrop.cirad.fr/509127/ |
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F30 - Génétique et amélioration des plantes H60 - Mauvaises herbes et désherbage Oryza sativa variation génétique mauvaise herbe zone tempérée microsatellite marqueur génétique génome http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_8347 http://aims.fao.org/aos/agrovoc/c_7656 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_3224 http://aims.fao.org/aos/agrovoc/c_3081 F30 - Génétique et amélioration des plantes H60 - Mauvaises herbes et désherbage Oryza sativa variation génétique mauvaise herbe zone tempérée microsatellite marqueur génétique génome http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_8347 http://aims.fao.org/aos/agrovoc/c_7656 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_3224 http://aims.fao.org/aos/agrovoc/c_3081 |
spellingShingle |
F30 - Génétique et amélioration des plantes H60 - Mauvaises herbes et désherbage Oryza sativa variation génétique mauvaise herbe zone tempérée microsatellite marqueur génétique génome http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_8347 http://aims.fao.org/aos/agrovoc/c_7656 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_3224 http://aims.fao.org/aos/agrovoc/c_3081 F30 - Génétique et amélioration des plantes H60 - Mauvaises herbes et désherbage Oryza sativa variation génétique mauvaise herbe zone tempérée microsatellite marqueur génétique génome http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_8347 http://aims.fao.org/aos/agrovoc/c_7656 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_3224 http://aims.fao.org/aos/agrovoc/c_3081 Bres-Patry, Cécile Bangratz, Martine Ghesquière, Alain Genetic diversity and population dynamics of weedy rice in France |
description |
Weedy rices have long been known, particularly in tropical areas, as the result of introgressions between wild and cultivated forms. More recently, new weedy forms in temperate regions where wild forms were never reported have invaded rice fields. These plants show many traits similar to true wild O. rufipogon (shattering, dormancy, awning, organ pigmentation). Their occurrence concerns many parts of the world practising intensive rice growing with direct seeding. Samples of weeds from France have been analysed with 15 microsatellite markers in comparison to a representative collection of 145 Asian rice varieties. Diversity of weedy rice is in agreement with the genetic structure of O. sativa separated in two main indica and japonica groups of varieties, Weeds from France showed a greater diversity than local Mediterranean varieties (temperate japonica) as well as original alleles or alleles more typical of indica varieties. Genetic structure of weed stands appeared more probably the consequence of a predominantly independent population dynamics allowed by seed conservation and dissemination and not the result of gene flow with varieties from which they are isolated by a much greater earliness. Results suggested that distant crosses between indica and japonica varieties and their possible effects on genome expression could be also a relevant explanation to weed origin. |
format |
conference_item |
topic_facet |
F30 - Génétique et amélioration des plantes H60 - Mauvaises herbes et désherbage Oryza sativa variation génétique mauvaise herbe zone tempérée microsatellite marqueur génétique génome http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_15975 http://aims.fao.org/aos/agrovoc/c_8347 http://aims.fao.org/aos/agrovoc/c_7656 http://aims.fao.org/aos/agrovoc/c_36574 http://aims.fao.org/aos/agrovoc/c_24030 http://aims.fao.org/aos/agrovoc/c_3224 http://aims.fao.org/aos/agrovoc/c_3081 |
author |
Bres-Patry, Cécile Bangratz, Martine Ghesquière, Alain |
author_facet |
Bres-Patry, Cécile Bangratz, Martine Ghesquière, Alain |
author_sort |
Bres-Patry, Cécile |
title |
Genetic diversity and population dynamics of weedy rice in France |
title_short |
Genetic diversity and population dynamics of weedy rice in France |
title_full |
Genetic diversity and population dynamics of weedy rice in France |
title_fullStr |
Genetic diversity and population dynamics of weedy rice in France |
title_full_unstemmed |
Genetic diversity and population dynamics of weedy rice in France |
title_sort |
genetic diversity and population dynamics of weedy rice in france |
publisher |
CIRAD |
url |
http://agritrop.cirad.fr/510145/ |
work_keys_str_mv |
AT brespatrycecile geneticdiversityandpopulationdynamicsofweedyriceinfrance AT bangratzmartine geneticdiversityandpopulationdynamicsofweedyriceinfrance AT ghesquierealain geneticdiversityandpopulationdynamicsofweedyriceinfrance |
_version_ |
1792495373948813312 |