Article
Plant Sciences
Na-Hyun Shin, O. New Lee, Jae-Hyuk Han, Kihwan Song, Hee-Jong Koh, Soo-Cheul Yoo, Joong Hyoun Chin
Summary: Pyramiding useful QTLs into an elite variety is a promising strategy for developing tolerant varieties against multiple abiotic stresses. However, testing the functional compatibility of different QTLs, such as Pup1 and Sub1, is crucial for ensuring their effectiveness in the target variety. In this study, it was found that while Pup1 and Sub1 were functionally compatible under submerged conditions, they exhibited incompatibility under P-non-supplied conditions, suggesting the need for further investigation into the underlying mechanisms.
Article
Multidisciplinary Sciences
Sandhya Rani Kuanar, Ramani Kumar Sarkar, Rashmi Panigrahi, Pravat Kumar Mohapatra
Summary: Identification and introgression of the Sub1 gene is important for ensuring yield stability in flood-prone rice agro-ecosystems. This study tested the response of Sub1 gene introgression in two rice varieties under stagnant flooding conditions and found that it did not influence the plants' tolerance to flooding. Stagnant flooding decreased the functional ability of the flag leaf and induced ethylene-mediated senescence, negatively affecting yield stability.
SCIENTIFIC REPORTS
(2023)
Article
Agronomy
Krishna Prasad Devkota, Koichi Futakuchi, Valere Cesse Mel, E. Humphreys
Summary: Early season flooding and submergence greatly affect rice production in West Africa. This study evaluated the performance of submergence tolerant rice varieties (Sub1) under different establishment methods. The results showed that wet seeding combined with Sub1 varieties can reduce yield losses, labor requirements, and increase profitability and resilience to flash flooding.
FIELD CROPS RESEARCH
(2022)
Article
Agriculture, Multidisciplinary
Asmuni Mohd Ikmal, Abd Aziz Shamsudin Noraziyah, Ratnam Wickneswari, Ismail Amira, Zulkafli Puteri Dinie Ellina
Summary: Climate change has led to increased instances of extreme flooding globally, affecting rice production. The study demonstrates that introgressing submergence tolerance QTL into drought-tolerant lines can improve morpho-physiological traits and increase survival rates.
ANNALS OF APPLIED BIOLOGY
(2021)
Article
Plant Sciences
Meenu M. Nair, K. S. Shylaraj
Summary: Marker Assisted Backcross Breeding (MABB) was used to introgress the Saltol QTL and Sub1 gene into the high yielding rice variety Aiswarya for developing a dual stress tolerant rice variety. The study aims to pyramid both target QTLs into the elite background of Aiswarya for cultivation in flood prone saline coastal agroecosystems.
PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
(2021)
Article
Agronomy
Nino P. M. C. Banayo, Noriko Kanno, Raymond E. Rahon, Pompe C. Sta. Cruz, Crisanta S. Bueno, Roel S. Suralta, Yoichiro Kato
Summary: This study evaluated nutrient management practices for dry direct-seeded rice (DDSR) and found that the impact on yield varied depending on soil types and timing of fertilizer application.
EUROPEAN JOURNAL OF AGRONOMY
(2022)
Review
Agronomy
Debabrata Panda, Jijnasa Barik
Summary: Flooding is a major stress constraint to rice production globally, with approximately one-fourth of rice crops grown in flood-prone areas. Significant progress has been made in understanding the mechanisms of adaptation and tolerance to flooding in rice over the past two decades. This review summarizes the physiological and molecular mechanisms of flooding tolerance in rice and discusses the implications for future crop improvement programs.
Article
Plant Sciences
Chaopu Zhang, Min Li, Jessica Domingo Rey, Ting Feng, Renee Lafitte, Tianqing Zheng, Yamei Lv, Fengcai Wu, Binying Fu, Jianlong Xu, Fan Zhang, Wei Zeng, Erbao Liu, Jauhar Ali, Wensheng Wang, Zhikang Li
Summary: This study aims to develop rice varieties with good tolerances to drought and submergence. By screening and genetic characterization, 124 introgression lines with improved submergence tolerance (ST) were identified out of 260 lines selected for drought tolerance (DT). The results provide valuable insights into the complex cross-talks between different phytohormone-mediated signaling pathways and the strategy of selective introgression for multiple complex traits.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
K. V. Arya, K. S. Shylaraj
Summary: The study successfully introgressed the submergence tolerance gene Sub1 into the rice variety Jaya using Marker-Assisted Backcross Breeding. The physiological responses of the introgressed lines were also investigated, showing improved shoot elongation and higher superoxide dismutase activity. These findings confirm the presence of the Sub1 gene and suggest the potential release of these lines as a new variety to help farmers in flood-prone areas.
PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
(2023)
Article
Plant Sciences
Mariam Barro, Abalo Itolou Kassankogno, Issa Wonni, Drissa Sereme, Irenee Somda, Hilaire Kouka Kabore, Gilles Bena, Christophe Brugidou, Didier Tharreau, Charlotte Tollenaere
Summary: This study in West Africa found that different irrigation and rainfed lowland rice growing systems exhibit distinct spatial and temporal patterns of rice disease occurrence and incidence, influenced by cultivation practices and pathogen types. Infection rates were significantly higher in irrigated areas compared to rainfed lowlands, with various diseases sometimes co-occurring in the same field or even on the same plant.
Article
Biochemistry & Molecular Biology
Yong-Pei Wu, Shu-Mei Wang, Yu-Chi Chang, Chi Ho, Yu-Chia Hsu
Summary: This study utilizes marker-assisted backcross breeding method to develop rice varieties with enhanced submergence stress tolerance by selecting progenies carrying Sub1A gene. The resulting genotypes show good agronomic traits and eating quality, providing a promising strategy for developing climate-resilient rice varieties suitable for flood-prone regions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Agronomy
Nino P. M. Banayo, Raymond E. Rahon, Pompe Sta Cruz, Yoichiro Kato
Summary: Recent advancements in rice breeding in tropical Asia have led to the development of high-yielding drought-tolerant rice cultivars, which have shown promising results in improving rice productivity under nutrient management in rainfed lowland ecosystems. The study aimed to evaluate the performance of different rice cultivars in response to fertilizer application regimes, showing that the drought-tolerant cultivar NSIC Rc282 was responsive to fertilizers and achieved similar yields to the high-yielding cultivar NSIC Rc222 under all conditions, with further confirmation of its drought adaptation in a follow-up experiment. The findings suggest that incorporating high-yielding drought-tolerant rice cultivars could enhance productivity and nutrient-use efficiency in rainfed environments.
PLANT PRODUCTION SCIENCE
(2021)
Review
Agronomy
Shuai Tong, Motoyuki Ashikari, Keisuke Nagai, Ole Pedersen
Summary: Considering the intensification of climate change, the urgent development of resilient rice that can endure abiotic stresses is necessary. Wild relatives of rice possess diverse mechanisms to shield themselves from environmental pressures. These wild plants may provide an untapped source of genetic diversity essential for improving abiotic stress tolerance in cultivated rice. However, traditional breeding methods such as backcrossing and transgenesis pose difficulties in transferring resilience traits between plants. On the other hand, genome editing allows for quick de novo domestication to produce rice with high yields from wild relatives, like O. longistaminata, which exhibits tolerance to multiple abiotic stresses and valuable traits for sustainable rice production.
Article
Agronomy
Goutam Das, Banshidhar Pradhan, Debendranath Bastia, Sanghamitra Samantaray, Debarchana Jena, Diptibala Rout, Paduranga Bhagwan Arsode, Vineeta Singh, Arup Kumar Mukherjee, Chander Mohan, Ramlakhan Verma
Summary: This study demonstrates the utility of marker-assisted backcross-breeding in improving submergence tolerance and bacterial blight resistance, and successfully develops sustainable rice varieties by introgressing tolerant genes and disease-resistant genes.
Article
Plant Sciences
Keisuke Nagai, Yusuke Kurokawa, Yoshinao Mori, Anzu Minami, Stefan Reuscher, Jianzhong Wu, Takashi Matsumoto, Motoyuki Ashikari
Summary: This study compared normal cultivated rice and deepwater rice and found complex genome changes in the region containing SK genes. The study also identified four new SK-like genes (SKL genes) in normal cultivated rice, but these genes were not expressed during submergence except for SKL3.