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Identification and Validation of Aerobic Adaptation QTLs in Upland Rice

The aerobic adaptation of upland rice is considered as the key genetic difference between upland rice and lowland rice. Genetic dissection of the aerobic adaptation is important as the basis for improving drought tolerance and terrestrial adaptation by using the upland rice. We raised BC(1)-BC(3) in...

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Autores principales: Xu, Peng, Yang, Jun, Ma, Zhenbing, Yu, Diqiu, Zhou, Jiawu, Tao, Dayun, Li, Zichao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7281610/
https://www.ncbi.nlm.nih.gov/pubmed/32423169
http://dx.doi.org/10.3390/life10050065
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author Xu, Peng
Yang, Jun
Ma, Zhenbing
Yu, Diqiu
Zhou, Jiawu
Tao, Dayun
Li, Zichao
author_facet Xu, Peng
Yang, Jun
Ma, Zhenbing
Yu, Diqiu
Zhou, Jiawu
Tao, Dayun
Li, Zichao
author_sort Xu, Peng
collection PubMed
description The aerobic adaptation of upland rice is considered as the key genetic difference between upland rice and lowland rice. Genetic dissection of the aerobic adaptation is important as the basis for improving drought tolerance and terrestrial adaptation by using the upland rice. We raised BC(1)-BC(3) introgression lines (ILs) in lowland rice Minghui 63 (MH63) background. The QTLs of yield and yield-related traits were detected based on ILs under the aerobic and lowland environments, and then the yield-related QTLs were identified in a backcrossed inbred population of BC(4)F(5) under aerobic condition. We further verified phenotypes of QTL near-isogenic lines. Finally, three QTLs responsible for increasing yield in aerobic environment were detected by multiple locations and generations, which were designated as qAER1, qAER3, and qAER9 (QTL of aerobic adaptation). The qAER1 and qAER9 were fine-mapped. We found that qAER1 and qAER9 controlled plant height and heading date, respectively; while both of them increased yields simultaneously by suitable plant height and heading date without delay in the aerobic environment. The phenotypic differences between lowland rice and upland rice in the aerobic environment further supported the above results. We pyramided the two QTLs as corresponding molecular modules in the irrigated lowland rice MH63 background, and successfully developed a new upland rice variety named as Zhongkexilu 2. This study will lay the foundation for using aerobic adaptation QTLs in rice breeding programs and for further cloning the key genes involved in aerobic adaptation.
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spelling pubmed-72816102020-06-17 Identification and Validation of Aerobic Adaptation QTLs in Upland Rice Xu, Peng Yang, Jun Ma, Zhenbing Yu, Diqiu Zhou, Jiawu Tao, Dayun Li, Zichao Life (Basel) Article The aerobic adaptation of upland rice is considered as the key genetic difference between upland rice and lowland rice. Genetic dissection of the aerobic adaptation is important as the basis for improving drought tolerance and terrestrial adaptation by using the upland rice. We raised BC(1)-BC(3) introgression lines (ILs) in lowland rice Minghui 63 (MH63) background. The QTLs of yield and yield-related traits were detected based on ILs under the aerobic and lowland environments, and then the yield-related QTLs were identified in a backcrossed inbred population of BC(4)F(5) under aerobic condition. We further verified phenotypes of QTL near-isogenic lines. Finally, three QTLs responsible for increasing yield in aerobic environment were detected by multiple locations and generations, which were designated as qAER1, qAER3, and qAER9 (QTL of aerobic adaptation). The qAER1 and qAER9 were fine-mapped. We found that qAER1 and qAER9 controlled plant height and heading date, respectively; while both of them increased yields simultaneously by suitable plant height and heading date without delay in the aerobic environment. The phenotypic differences between lowland rice and upland rice in the aerobic environment further supported the above results. We pyramided the two QTLs as corresponding molecular modules in the irrigated lowland rice MH63 background, and successfully developed a new upland rice variety named as Zhongkexilu 2. This study will lay the foundation for using aerobic adaptation QTLs in rice breeding programs and for further cloning the key genes involved in aerobic adaptation. MDPI 2020-05-14 /pmc/articles/PMC7281610/ /pubmed/32423169 http://dx.doi.org/10.3390/life10050065 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Peng
Yang, Jun
Ma, Zhenbing
Yu, Diqiu
Zhou, Jiawu
Tao, Dayun
Li, Zichao
Identification and Validation of Aerobic Adaptation QTLs in Upland Rice
title Identification and Validation of Aerobic Adaptation QTLs in Upland Rice
title_full Identification and Validation of Aerobic Adaptation QTLs in Upland Rice
title_fullStr Identification and Validation of Aerobic Adaptation QTLs in Upland Rice
title_full_unstemmed Identification and Validation of Aerobic Adaptation QTLs in Upland Rice
title_short Identification and Validation of Aerobic Adaptation QTLs in Upland Rice
title_sort identification and validation of aerobic adaptation qtls in upland rice
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7281610/
https://www.ncbi.nlm.nih.gov/pubmed/32423169
http://dx.doi.org/10.3390/life10050065
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