The genetic basis of drought tolerance in the high oil crop Sesamum indicum
Unlike most of the important food crops, sesame can survive drought but severe and repeated drought episodes, especially occurring during the reproductive stage, significantly curtail the productivity of this high oil crop. Genome‐wide association study was conducted for traits related to drought tolerance using 400 diverse sesame accessions, including landraces and modern cultivars. Ten stable QTLs explaining more than 40% of the phenotypic variation and located on four linkage groups were significantly associated with drought tolerance related traits. Accessions from the tropical area harboured higher numbers of drought tolerance alleles at the peak loci and were found to be more tolerant than those from the northern area, indicating a long‐term genetic adaptation to drought‐prone environments. We found that sesame has already fixed important alleles conferring survival to drought which may explain its relative high drought tolerance. However, most of the alleles crucial for productivity and yield maintenance under drought conditions are far from been fixed. This study also revealed that pyramiding the favourable alleles observed at the peak loci is of high potential for enhancing drought tolerance in sesame. In addition, our results highlighted two important pleiotropic QTLs harbouring known and unreported drought tolerance genes such as SiABI4, SiTTM3, SiGOLS1, SiNIMIN1 and SiSAM. By integrating candidate gene association study, gene expression and transgenic experiments, we demonstrated that SiSAM confers drought tolerance by modulating polyamine levels and ROS homeostasis, and a missense mutation in the coding region partly contributes to the natural variation of drought tolerance in sesame.
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Subjects: | F30 - Génétique et amélioration des plantes, H50 - Troubles divers des plantes, Sesamum indicum, résistance à la sécheresse, résistance génétique, expression des gènes, locus des caractères quantitatifs, allèle, tolérance à la sécheresse, http://aims.fao.org/aos/agrovoc/c_6992, http://aims.fao.org/aos/agrovoc/c_2392, http://aims.fao.org/aos/agrovoc/c_35130, http://aims.fao.org/aos/agrovoc/c_27527, http://aims.fao.org/aos/agrovoc/c_37974, http://aims.fao.org/aos/agrovoc/c_8724, http://aims.fao.org/aos/agrovoc/c_14914, http://aims.fao.org/aos/agrovoc/c_1556, |
Online Access: | http://agritrop.cirad.fr/592672/ http://agritrop.cirad.fr/592672/13/592672.pdf |
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dig-cirad-fr-5926722024-01-29T02:01:23Z http://agritrop.cirad.fr/592672/ http://agritrop.cirad.fr/592672/ The genetic basis of drought tolerance in the high oil crop Sesamum indicum. Dossa Komivi, Li Donghua, Zhou Rong, Yu Jingyin, Wang Linhai, Zhang Yanxin, You Jun, Liu Aili, Mmadi Marie Ali, Foncéka Daniel, Diouf Diaga, Cissé Ndiaga, Wei Xin, Zhang Xiurong. 2019. Plant Biotechnology Journal, 17 (9) : 1788-1803.https://doi.org/10.1111/pbi.13100 <https://doi.org/10.1111/pbi.13100> The genetic basis of drought tolerance in the high oil crop Sesamum indicum Dossa, Komivi Li, Donghua Zhou, Rong Yu, Jingyin Wang, Linhai Zhang, Yanxin You, Jun Liu, Aili Mmadi, Marie Ali Foncéka, Daniel Diouf, Diaga Cissé, Ndiaga Wei, Xin Zhang, Xiurong eng 2019 Plant Biotechnology Journal F30 - Génétique et amélioration des plantes H50 - Troubles divers des plantes Sesamum indicum résistance à la sécheresse résistance génétique expression des gènes locus des caractères quantitatifs allèle tolérance à la sécheresse http://aims.fao.org/aos/agrovoc/c_6992 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_35130 http://aims.fao.org/aos/agrovoc/c_27527 http://aims.fao.org/aos/agrovoc/c_37974 http://aims.fao.org/aos/agrovoc/c_8724 http://aims.fao.org/aos/agrovoc/c_14914 Chine http://aims.fao.org/aos/agrovoc/c_1556 Unlike most of the important food crops, sesame can survive drought but severe and repeated drought episodes, especially occurring during the reproductive stage, significantly curtail the productivity of this high oil crop. Genome‐wide association study was conducted for traits related to drought tolerance using 400 diverse sesame accessions, including landraces and modern cultivars. Ten stable QTLs explaining more than 40% of the phenotypic variation and located on four linkage groups were significantly associated with drought tolerance related traits. Accessions from the tropical area harboured higher numbers of drought tolerance alleles at the peak loci and were found to be more tolerant than those from the northern area, indicating a long‐term genetic adaptation to drought‐prone environments. We found that sesame has already fixed important alleles conferring survival to drought which may explain its relative high drought tolerance. However, most of the alleles crucial for productivity and yield maintenance under drought conditions are far from been fixed. This study also revealed that pyramiding the favourable alleles observed at the peak loci is of high potential for enhancing drought tolerance in sesame. In addition, our results highlighted two important pleiotropic QTLs harbouring known and unreported drought tolerance genes such as SiABI4, SiTTM3, SiGOLS1, SiNIMIN1 and SiSAM. By integrating candidate gene association study, gene expression and transgenic experiments, we demonstrated that SiSAM confers drought tolerance by modulating polyamine levels and ROS homeostasis, and a missense mutation in the coding region partly contributes to the natural variation of drought tolerance in sesame. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/592672/13/592672.pdf text cc_by info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ https://doi.org/10.1111/pbi.13100 10.1111/pbi.13100 info:eu-repo/semantics/altIdentifier/doi/10.1111/pbi.13100 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1111/pbi.13100 |
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F30 - Génétique et amélioration des plantes H50 - Troubles divers des plantes Sesamum indicum résistance à la sécheresse résistance génétique expression des gènes locus des caractères quantitatifs allèle tolérance à la sécheresse http://aims.fao.org/aos/agrovoc/c_6992 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_35130 http://aims.fao.org/aos/agrovoc/c_27527 http://aims.fao.org/aos/agrovoc/c_37974 http://aims.fao.org/aos/agrovoc/c_8724 http://aims.fao.org/aos/agrovoc/c_14914 http://aims.fao.org/aos/agrovoc/c_1556 F30 - Génétique et amélioration des plantes H50 - Troubles divers des plantes Sesamum indicum résistance à la sécheresse résistance génétique expression des gènes locus des caractères quantitatifs allèle tolérance à la sécheresse http://aims.fao.org/aos/agrovoc/c_6992 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_35130 http://aims.fao.org/aos/agrovoc/c_27527 http://aims.fao.org/aos/agrovoc/c_37974 http://aims.fao.org/aos/agrovoc/c_8724 http://aims.fao.org/aos/agrovoc/c_14914 http://aims.fao.org/aos/agrovoc/c_1556 |
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F30 - Génétique et amélioration des plantes H50 - Troubles divers des plantes Sesamum indicum résistance à la sécheresse résistance génétique expression des gènes locus des caractères quantitatifs allèle tolérance à la sécheresse http://aims.fao.org/aos/agrovoc/c_6992 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_35130 http://aims.fao.org/aos/agrovoc/c_27527 http://aims.fao.org/aos/agrovoc/c_37974 http://aims.fao.org/aos/agrovoc/c_8724 http://aims.fao.org/aos/agrovoc/c_14914 http://aims.fao.org/aos/agrovoc/c_1556 F30 - Génétique et amélioration des plantes H50 - Troubles divers des plantes Sesamum indicum résistance à la sécheresse résistance génétique expression des gènes locus des caractères quantitatifs allèle tolérance à la sécheresse http://aims.fao.org/aos/agrovoc/c_6992 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_35130 http://aims.fao.org/aos/agrovoc/c_27527 http://aims.fao.org/aos/agrovoc/c_37974 http://aims.fao.org/aos/agrovoc/c_8724 http://aims.fao.org/aos/agrovoc/c_14914 http://aims.fao.org/aos/agrovoc/c_1556 Dossa, Komivi Li, Donghua Zhou, Rong Yu, Jingyin Wang, Linhai Zhang, Yanxin You, Jun Liu, Aili Mmadi, Marie Ali Foncéka, Daniel Diouf, Diaga Cissé, Ndiaga Wei, Xin Zhang, Xiurong The genetic basis of drought tolerance in the high oil crop Sesamum indicum |
description |
Unlike most of the important food crops, sesame can survive drought but severe and repeated drought episodes, especially occurring during the reproductive stage, significantly curtail the productivity of this high oil crop. Genome‐wide association study was conducted for traits related to drought tolerance using 400 diverse sesame accessions, including landraces and modern cultivars. Ten stable QTLs explaining more than 40% of the phenotypic variation and located on four linkage groups were significantly associated with drought tolerance related traits. Accessions from the tropical area harboured higher numbers of drought tolerance alleles at the peak loci and were found to be more tolerant than those from the northern area, indicating a long‐term genetic adaptation to drought‐prone environments. We found that sesame has already fixed important alleles conferring survival to drought which may explain its relative high drought tolerance. However, most of the alleles crucial for productivity and yield maintenance under drought conditions are far from been fixed. This study also revealed that pyramiding the favourable alleles observed at the peak loci is of high potential for enhancing drought tolerance in sesame. In addition, our results highlighted two important pleiotropic QTLs harbouring known and unreported drought tolerance genes such as SiABI4, SiTTM3, SiGOLS1, SiNIMIN1 and SiSAM. By integrating candidate gene association study, gene expression and transgenic experiments, we demonstrated that SiSAM confers drought tolerance by modulating polyamine levels and ROS homeostasis, and a missense mutation in the coding region partly contributes to the natural variation of drought tolerance in sesame. |
format |
article |
topic_facet |
F30 - Génétique et amélioration des plantes H50 - Troubles divers des plantes Sesamum indicum résistance à la sécheresse résistance génétique expression des gènes locus des caractères quantitatifs allèle tolérance à la sécheresse http://aims.fao.org/aos/agrovoc/c_6992 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_35130 http://aims.fao.org/aos/agrovoc/c_27527 http://aims.fao.org/aos/agrovoc/c_37974 http://aims.fao.org/aos/agrovoc/c_8724 http://aims.fao.org/aos/agrovoc/c_14914 http://aims.fao.org/aos/agrovoc/c_1556 |
author |
Dossa, Komivi Li, Donghua Zhou, Rong Yu, Jingyin Wang, Linhai Zhang, Yanxin You, Jun Liu, Aili Mmadi, Marie Ali Foncéka, Daniel Diouf, Diaga Cissé, Ndiaga Wei, Xin Zhang, Xiurong |
author_facet |
Dossa, Komivi Li, Donghua Zhou, Rong Yu, Jingyin Wang, Linhai Zhang, Yanxin You, Jun Liu, Aili Mmadi, Marie Ali Foncéka, Daniel Diouf, Diaga Cissé, Ndiaga Wei, Xin Zhang, Xiurong |
author_sort |
Dossa, Komivi |
title |
The genetic basis of drought tolerance in the high oil crop Sesamum indicum |
title_short |
The genetic basis of drought tolerance in the high oil crop Sesamum indicum |
title_full |
The genetic basis of drought tolerance in the high oil crop Sesamum indicum |
title_fullStr |
The genetic basis of drought tolerance in the high oil crop Sesamum indicum |
title_full_unstemmed |
The genetic basis of drought tolerance in the high oil crop Sesamum indicum |
title_sort |
genetic basis of drought tolerance in the high oil crop sesamum indicum |
url |
http://agritrop.cirad.fr/592672/ http://agritrop.cirad.fr/592672/13/592672.pdf |
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