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13. Novel QTLs from Wild Rice Oryza longistaminata Confer Strong Tolerance to High Temperature at Seedling Stage

Author

Fan Fengfeng, Cai Meng, Luo Xiong, Liu Manman, Yuan Huanran, Cheng Mingxing, Ayaz Ahmad, Li Nengwu, and Li Shaoqing

Subjects
wild rice, Oryza longistaminata, heat tolerance, QTL, Plant culture, SB1-1110
Abstract

Global warming poses a threat to rice production. Breeding heat-tolerant rice is an effective and economical approach to address this challenge. African rice is a valuable genetic resource for developing heat-tolerant crops due to its intricate mechanism for adapting to high temperatures. Oryza longistaminata, a widely distributed wild rice species in Africa, may harbor an even richer gene pool for heat tolerance, which remains untapped. In this study, we identified three heat tolerance QTLs from O. longistaminata at the seedling stage, including novel heat tolerance loci qTT4 and qTT5. Our findings demonstrated that the O. longistaminata alleles for these two QTLs can enhance the heat tolerance of rice seedlings. Remarkably, qTT5 was mapped to a region spanning approximately 287.2 kb, which contains 46 expressing genes. Through the analysis of Gene Ontology and expression differences under heat induction, we identified four candidate genes. Our results lay the foundation for discovering heat tolerance genes underlying O. longistaminata and developing new genetic resources for heat-tolerant rice breeding.

Published
2023
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21. Exploring the High-Quality Development of Smart City Tourism in the Information Age

Author

Liu Manman

Subjects
bp neural network, entropy weight method, smart city tourism, informatization, 68m11, Mathematics, QA1-939
Abstract

This article discusses the high-level guidance strategy and deep-level value embodiment of tourism informatization construction for smart city tourism. Based on the existing evaluation system of intelligent city tourism development, the article utilizes BP neural network for data screening. It combines the entropy weight method to complete the index assignment, and evaluates and analyzes the development of innovative tourism services in six intelligent cities. In the area of brilliant tourism information service, Beijing scored 94%. In clever catering and accommodation services, Beijing leads with a score of 90%, while Nanjing and Chengdu rank second and third with scores of 81% and 80% respectively. Regarding overall innovative tourism development, Beijing scored 0.4731, 0.1762, and 0.1168 in terms of scientific and technological innovation, economic development, and general development security, respectively. In addition, the intelligent tourism development trend from 2018 to 2022 shows that Beijing’s tourism revenue will reach 622.46 billion yuan in 2022, which is 30.36 billion yuan more than the previous year. By evaluating the development of intelligent city tourism services through BP neural network, this paper effectively identifies the critical factors for developing clever tourism construction. It puts forward effective strategies to improve the level of intelligent services. These findings have important theoretical and practical significance for the development of intellectual city tourism field, and provide an essential reference for the further optimization of smart city tourism services.

Published
2024
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30. Amorphization‐Driven RhRu Bimetallene Enhances Water Dissociation Kinetics.

Author

Wu, Jiandong, Liu, Manman, Fan, Jinchang, Qiu, Yu, Lu, Wenting, Fan, Xiaofeng, Zhang, Wei, Zhang, Lei, and Cui, Xiaoqiang

Abstract

Phase engineering holds great promise in enhancing the functionalities of nanomaterials by enabling precise control over their phase and morphology. However, achieving this level of control in synthesis remains a significant challenge. In this study, the synthesis of a highly amorphous RhRu (a‐RhRu) bimetallene using a one‐pot wet‐chemical approach is presented. The introduction of a highly amorphous structure allows for the optimization of electron configurations overall structure of a‐RhRu. This catalyst demonstrates exceptional activity in the alkaline hydrogen evolution reaction, with a low overpotential of 32 mV at 10 mA cm−2 and a high turnover frequency (TOF) of 3.06 H2 s−1 at an overpotential of 50 mV, surpassing the performance of most reported Rh‐based electrocatalysts. The findings underscore the potential of phase engineering strategies in electrocatalysis. [ABSTRACT FROM AUTHOR]

Published
2024
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