Independent genetic differentiation between upland and lowland rice ecotypes within japonica and indica subspecies during their adaptations to different soil-nitrogen conditions

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外文标题：Independent genetic differentiation between upland and lowland rice ecotypes within japonica and indica subspecies during their adaptations to different soil-nitrogen conditions

外文摘要：The soil-nitrogen condition,which differs greatly between paddy fields(mainly in the form of ammonium,NH4+)and dry fields(mainly in the form of nitrate,NO3-),is a main environmental factor that drives the adaptive differentiation between upland and lowland rice ecotypes.However,the adaptive differentiation in terms of the nitrogen use efficiency(NUE)between upland and lowland rice has not been well addressed.In this study,we evaluated NUE-related traits among rice landraces as well as the genetic differentiation between NUE-associated genes and quantitative trait loci(QTLs).The japonica upland and lowland rice ecotypes showed large differences in their NUE-related traits such as the absorption ability for NH4+and NO3-.The indica upland and lowland rice exhibited similar performances when cultivated in solutions containing NH4+or NO3-or when planted in paddy or dry fields.However,the indica upland rice possessed a greater ability to absorb NO3-.We identified 76 QTLs for 25 measured traits using genome-wide association analysis.The highly differentiated NUE-associated genes or QTLs between ecotypes were rarely shared by japonica and indica subspecies,indicating an independent genetic basis for their soil-nitrogen adaptations.We suggested four genes in three QTLs as the candidates contributing to rice NUE during the ecotypic differentiation.In summary,the soil-nitrogen condition drives the adaptive differentiation of NUE between upland and lowland rice independently within the japonica and indica subspecies.These findings can strengthen our understanding of rice adaptation to divergent soil-nitrogen conditions and have implications for the improvement of NUE.

外文关键词：

ecotypic adaptationnitrogen use efficiencyparallel evolutionupland rice

作者：

Heng-Ling Zhou、Lei Wang、Yun-Xia Yue、Zhi Luo、Shun-Jie Wang、Li-Guo Zhou、Li-Jun Luo、Hui Xia、Ming Yan

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作者单位：

Shanghai Agrobiological Gene Center,Shanghai 201106,China

College of Plant Sciences & Technology,Huazhong Agricultural University,Wuhan 430070,China

Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization,Ministry of Agriculture and Rural Affairs,Shanghai 201106,China

Shanghai Collaborative Innovation Center of Agri-Seeds,Shanghai 200240,China

National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research(Wuhan),Hubei Hongshan Laboratory,Huazhong Agricultura

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关键词：

ecotypic adaptation nitrogen use efficiency parallel evolution upland rice

出版年：

2024

DOI：

10.1111/jse.13046

植物分类学报

中国科学院植物研究所　中国植物学会

植物分类学报

CSTPCD

影响因子：0.322

ISSN：1674-4918

年,卷(期)：2024.62(5)