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The OsWRKY72-OsAAT30/OsGSTU26 module mediates reactive oxygen species scavenging to drive heterosis for salt tolerance in Hybrid rice

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Journal of Integrative Plant Biology 2024年第4期66卷 709-730页

作者： Citao Liu Bigang Mao Yanxia Zhang Lei tian Biao Ma Zhuo Chen Zhongwei Wei Aifu Li Ye Shao Gongye Cheng Lingling Li Wenyu Li Di Zhang Xiaoping Ding Jiangxiang Peng Yulin Peng Jiwai He Nenghui Ye Dingyang Yuan Chengcai Chu Meijuan Duan Hunan Provincial Key Laboratory of Stress Biology College of AgricultureHunan Agricultural UniversityChangsha 410128China State Key Laboratory of Hybrid rice Hunan Hybrid Rice Research CenterChangsha 410125China College of Agriculture South China Agricultural UniversityGuangzhou 510642China State Key Laboratory of Wheat and Maize Crop Science Center for Crop Genome EngineeringCollege of AgronomyHenan Agricultural UniversityZhengzhou 450002China College of Horticulture Fujian Agriculture and Forestry UniversityFuzhou 350002China Department of Computational Medicine and Bioinformatics University of MichiganAnn ArborMI 48109 USA Biobin Data Science Co. Ltd.Changsha 410221China

Hybrid rice(Oryza sativa)generally outperforms its inbred parents in yield and stress tolerance,a phenomenon termed heterosis,but the underlying mechanism is not completely understood.Here,we combined transcriptome,proteome,physiological,and heterosis analyses to examine the salt response of super Hybrid rice Chaoyou1000(CY1000).In addition to surpassing the mean values for its two parents(mid-parent heterosis),CY1000 exhibited a higher reactive oxygen species scavenging ability than both its parents(over-parent heterosis or heterobeltiosis).Nonadditive expression and allele-specific gene expression assays showed that the glutathione S-transferase gene OsGSTU26 and the amino acid transporter gene OsAAT30 may have major roles in heterosis for salt tolerance,acting in an overdominant fashion in CY1000.Furthermore,we identified OsWRKY72 as a common transcription factor that binds and regulates OsGSTU26 and OsAAT30.The salt-sensitive phenotypes were associated with the OsWRKY72^(paternal)genotype or the OsAAT30^(maternal)genotype in core rice germplasm varieties.OsWRKY72^(paternal)specifically repressed the expression of OsGSTU26 under salt stress,leading to salinity sensitivity,while OsWRKY72^(maternal)specifically repressed OsAAT30,resulting in salinity tolerance.These results suggest that the OsWRKY72-OsAAT30/OsGSTU26 module may play an important role in heterosis for salt tolerance in an overdominant fashion in CY1000 Hybrid rice,providing valuable clues to elucidate the mechanism of heterosis for salinity tolerance in Hybrid rice.

关键词： allele-specific gene expression(ASE) heterosis Hybrid rice nonadditive effect(NAE) salt tolerance transcriptome and proteome

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Irrigating with cooler water does not reverse high temperature impact on grain yield and quality in Hybrid rice

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The Crop Journal 2023年第3期11卷 904-913页

作者： Wanju Shi Xinzhen Zhang Juan Yang Somayanda M.Impa De Wang Yusha Lai Zijin Yang Hang Xu Jinshui Wu Jianhua Zhang S.V.Krishna Jagadish College of Agronomy Hunan Agricultural UniversityChangsha 410128HunanChina Department of Biology Hong Kong Baptist UniversityKowloonHong KongChina State Key Laboratory of Agrobiotechnology The Chinese University of Hong KongShatinHong KongChina Department of Plant and Soil Sciences Texas Tech UniversityLubbockTX 79410USA International rice Research Institute DAPO Box 7777Metro ManilaPhilippines

rice grain yield and quality are negatively impacted by high temperature stress.Irrigation water temperature significantly affects rice growth and development,thus influencing yield and quality.The role of cooler irrigation water in counteracting high temperature induced damages in rice grain yield and quality are not explored.Hence,in the present study two rice hybrids,Liangyoupeijiu(LYPJ)and IIyou 602(IIY602)were exposed to heat stress and irrigated with water having different temperatures in a splitsplit plot experimental design.The stress was imposed starting from heading until maturity under field-based heat tents,over two consecutive years.The maximum day temperature inside the heat tents was set at 38℃.For the irrigation treatments,two different water sources were used including belowground water with cooler water temperature and pond water with relatively higher water temperature.Daytime mean temperatures in the heat tents were increased by 1.2–2.0℃ across two years,while nighttime temperature remained similar at both within and outside the heat tents.Cooler belowground water irrigation did have little effect on air temperature at the canopy level but decreased soil temperature(0.2–1.4℃)especially under control.Heat stress significantly reduced grain yield(33%to 43%),panicles m^(-2)(9%to 10%),spikelets m^(-2)(15%to 22%),grain-filling percentage(13%to 26%)and 1000-grain weight(3%to 5%).Heat stress significantly increased chalkiness and protein content and decreased grain length and amylose content.Grain yield was negatively related to air temperature at the canopy level and soil temperature.Whereas grain quality parameters like chalkiness recorded a significantly positive association with both air and soil temperatures.Irrigating with cooler belowground water reduced the negative effect of heat stress on grain yield by 8.8%in LYPJ,while the same effect was not seen in IIY602,indicating cultivar differences in their response to irrigation water temperature.Our findings reveal that irrigating with cooler bel

关键词： Grain quality Grain yield Hybrid rice High temperature Irrigation Water management

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Effect of Hybrid rice varieties on growth and development of broilers and ducks

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Animal Nutrition 2021年第1期7卷 127-133页

作者： Frederick M.LeMieux Courtney P.Villemarette Eddie K.Lyons Thomas H.Shields Norman German School of Agricultural Sciences McNeese State UniversityLake CharlesLA70609United States

Three experiments(Exp.1,n=144 broilers[Ross×Ross];Exp.2,n=118 mallard ducklings[Anas platyrhynchos];and Exp.3,n=75 mature mallard ducks)were conducted to determine the effects of 3 levels of unmilled Hybrid rice on growth performance and organ and gastrointestinal tract develop-ment.The dietary treatments were 1)corn-soybean meal(basal),2)basal+5%Hybrid rice,and 3)basal+10%Hybrid rice for Exp.1 to 3,respectively.One bird from each pen in Exp.1(n=24)and all the birds in Exp.2(n=118)and Exp.3(n=75)were randomly selected and euthanized to determine linear measurements and organ and gastrointestinal tract weight.In Exp.1 and 2,birds fed 10%rice experi-enced slower growth(Price did not affect growth performance.rice addition did not affect organ length or weight(P>0.05)in Exp.1.However,birds fed 5%rice had significantly increased(Price significantly increased(Price to broiler and duck diets may reduce growth performance.

关键词： Hybrid rice Broiler Mallard duckling Mallard duck

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An enhanced network of energy metabolism,lysine acetylation,and growth-promoting protein accumulation is associated with heterosis in elite Hybrid rice

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Plant Communications 2023年第4期4卷 146-159页

作者： Xuan Ma Qingxiao Jia Sheng Li Zhengting Chen Xin Ming Yu Zhao Dao-Xiu Zhou National Key Laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China Institute of Plant Science Paris-Saclay(IPS2) CNRSINRAEUniversity Paris-Saclay91405 OrsayFrance

Heterosis refers to the superior performance of a hybrid compared with its parental lines.Although several genetic and molecular models have been proposed to explain heterosis,it remains unclear how hybrid cells integrate complementary gene expression or activity to drive heterotic growth.In this work,we show that accumulation of growth-promoting and energy metabolism proteins,enhanced energy metabolism activities,and increased protein lysine acetylation were associated with superior growth of the panicle meristem in the elite Hybrid rice Shanyou 63 relative to its parental varieties.Metabolism of nuclear/cytosolic acetylcoenzyme A was also enhanced in the hybrid,which paralleled increases in histone H3 acetylation to selectively target the expression of growth-promoting and metabolic genes.Lysine acetylation of cellular proteins,including TARGET OF RAPAMYCIN complex 1,ribosomal proteins,and energy metabolism enzymes,was also augmented and/or remodeled to modulate their activities.The data indicate that an enhanced network of energy-producing metabolic activity and growth-promoting histone acetylation/gene expression in the hybrid could contribute to its superior growth rate and may constitute a model to explain heterosis.

关键词： heterosis TORC1 r-protein lysine acetylation energy metabolism Hybrid rice

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Innovation and development of the third-generation Hybrid rice technology

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The Crop Journal 2021年第3期9卷 693-701页

作者： Chancan Liao Wei Yan Zhufeng Chen Gang Xie Xing Wang Deng Xiaoyan Tang Guangdong Provincial Key Laboratory of Biotechnology for Plant Development School of Life SciencesSouth China Normal UniversityGuangzhou 510631GuangdongChina Shenzhen Institute of Molecular Crop Design Shenzhen 518107China Institute of Plant and Food Sciences Department of BiologySouthern University of Science and TechnologyShenzhen 518055China

The breeding and large-scale application of Hybrid rice contribute significantly to the food supply worldwide.Currently,hybrid seed production uses cytoplasmic male sterile(CMS)lines or photoperiod/thermo-sensitive genic male sterile(PTGMS)lines as female parent.Despite huge successes,both systems have intrinsic problems.CMS systems are mainly restricted by the narrow restorer resources that make it difficult to breed superior hybrids,while PTGMS systems are limited by conditional sterility of the male sterile lines that makes the propagation of both PTGMS seeds and hybrid seeds vulnerable to unpredictable climate changes.Recessive nuclear male sterile(NMS)lines insensitive to environmental conditions are widely distributed and are ideal for Hybrid rice breeding and production,but the lack of effective ways to propagate the pure NMS lines in a large scale renders it impossible to use them for Hybrid rice production.The development of"the third-generation Hybrid rice technology"enables efficient propagation of the pure NMS lines in commercial scale.This paper discusses the establishment of"the thirdgeneration Hybrid rice technology"and further innovations.This new technology breaks the limitations of CMS and PTGMS systems and will bring a big leap forward in Hybrid rice production.

关键词： Hybrid rice Nuclear male sterile line The third-generation Hybrid rice technology Pollen inactivation Seed sorting

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Why high grain yield can be achieved in single seedling machine-transplanted Hybrid rice under dense planting conditions?

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Journal of Integrative Agriculture 2018年第6期17卷 1299-1306页

作者： HUANG Min SHAN Shuang-lü XIE Xiao-bing CAO Fang-bo ZOU Ying-bin Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO) Hunan Agricultural University

This study was conducted to identify the factors associated with high grain yield in single seedling machine-transplanted Hybrid rice under dense planting conditions. Field experiments were done in Yong＇an Town, Hunan Province, China in 2015 and 2016. Two Hybrid rice cultivars were grown under single seedling machine transplanting （SMT） and conventional machine transplanting （CMT） at a high planting density in each year. Grain yield and yield attributes were compared between SMT and CMT. Averaged across cultivars and years, grain yield was 12％ higher under SMT than under CMT. Plant height, basal stem width, and shoot and root dry weights were higher in seedlings for SMT than those for CMT. SMT had less maximum tiller number per m2 and consequently less panicle number per m2 than did CMT. Branch number per panicle, especially the secondary branch number per panicle, and spikelet number per cm of panicle length were more under SMT than under CMT, which resulted in more spikelet number per panicle under SMT than under CMT. SMT had higher or equal spikelet filling percentage than did CMT. The difference in grain weight between SMT and CMT was relatively small and inconsistent cross years. SMT had higher or equal total biomass and harvest index than did CMT. Dry weight per stem under SMT was heavier than that under CMT. Larger leaf area per stem was partly responsible for the heavier dry weight per stem under SMT than under CMT. Our study suggests that improvement in seedling quality, panicle size, and dry weight per stem are critical to the high grain yield in single seedling machine-transplanted Hybrid rice under dense planting conditions.

关键词： grain yield Hybrid rice machine transplanting single seedling

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Synthetic apomixis enables stable transgenerational transmission of heterotic phenotypes in Hybrid rice

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Plant Communications 2023年第2期4卷 227-235页

作者： Chaolei Liu Zexue He Yan Zhang Fengyue Hu Mengqi Li Qing Liu Yong Huang Jian Wang Wenli Zhang Chun Wang Kejian Wang State Key Laboratory of rice Biology China National Rice Research InstituteHangzhou 310006China State Key Laboratory for Crop Genetics and Germplasm Enhancement CIC-MCPNanjing Agriculture UniversityNanjingJiangsu 210095China Hainan Yazhou Bay Seed Lab SanyaHainan 572025China

In hybrid plants,heterosis often produces large,vigorous plants with high yields;however,hybrid seeds are generated by costly and laborious crosses of inbred parents.Apomixis,in which a plant produces a clone of itself via asexual reproduction through seeds,may produce another revolution in plant biology.Recently,synthetic apomixis enabled clonal reproduction of F_(1) hybrids through seeds in rice(Oryza sativa),but the inheritance of the synthetic apomixis trait and superior heterotic phenotypes across generations remained unclear.Here,we propagated clonal plants to the T_(4) generation and investigated their genetic and molecular stability at each generation.By analyzing agronomic traits,as well as the genome,methylome,transcriptome,and allele-specific transcriptome,we showed that the descendant clonal plants remained stable.Unexpectedly,in addition to normal clonal seeds,the plants also produced a few aneuploids that had eliminated large genomic segments in each generation.Despite the identification of rare aneuploids,the observation that the synthetic apomixis trait is stably transmitted through multiple generations helps confirm the feasibility of using apomixis in the future.

关键词： synthetic apomixis Hybrid rice transgenerational heredity stability

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Mitigating risks of Hybrid rice use in terrace agriculture

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Geography and Sustainability 2023年第1期4卷 1-5页

作者： Joy D’Angelo Santosh S.Palmate Luc Descroix Department of Ethnic Languages Yunnan Nationalities UniversityKunming 650031China Texas A&M AgriLife Research Texas A&M University SystemEl PasoTexas 79927United States of America Hydrology at UMR PALOC IRD/MNHN 75231 Paris Cedex 05France

The Honghe Hani rice Terraces of Yunnan Province have become a national emblem for China and a UNESCO World Heritage Site,but some are beginning to crumble.This research attempts to address why this is happening and what can be done about it.Previous work has failed to adequately address the possible shortcomings of recently introduced seed and water management technologies,their particular effect on rice terraces and the people who depend upon them.In an effort to better understand the issue,field observation was triangulated with in-depth interviews with local people,and the examination of scientific literature.To do this,the authors spent time in China with a translator in a key village known to be first in the area to truly succeed in carving the rice terraces and in making the mountain slope irrigation system required actually working.Results validated by experts in each field indicate that while the new seed and technologies do save water and improve lives,paired with migration,they may also be threatening the long-term viability of rice terracing in the region.The authors conclude that an integrated approach is needed and put forward a strategic blueprint to reinforce ecological,social and economic longevity.They also call for more research into the applicability of these resilience measures in other Hybrid rice terracing regions,such as in the Philippines and Vietnam.

关键词： Hybrid rice rice terraces Agroecology Agroforestry Slope agriculture Landslides

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Location Distribution Characteristics in Leaf Lateral Asymmetry of hybrid Indica rice

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Phyton-International Journal of Experimental Botany 2020年第3期89卷 657-666页

作者： Jie Li Yuehua Feng Jinfeng Peng Xiaoke Wang Dinghua Yang Guiling Xu College of Agronomy Guizhou UniversityGuiyang550025China Qiandongnan Vocational and Technical College for Nationalities Kaili556000China Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education) Guizhou UniversityGuiyang550025China

rice leaves show lateral asymmetry.Differences in width,thickness,chlorophyll meter readings,nitrogen content,density,and yield on each asymmetrical have been reported.However,limited information is available on the distribution characteristics of the smooth side(SS)and rough side(RS)of rice leaves.The SS of rice leaves can be divided into two types according to its location in leaf:one is the smooth side appearing on the left(SSAL)of the leaf,while the smooth side of the other type appears on the right(SSAR).Through the investigation of four rice varieties,we identified that the proportion of SSAL or SSAR of flag leaves on main stems or tillers was close to 0.50 in the rice population.On the same tiller stem,SSAL and SSAR present alternately,and the SS always stretches ahead of the RS in the curled state.Among the tiller flag leaves of a single rice plant,the proportion of tiller flag leaves with SSAL or SSAR to the total number of tillers is a discrete random variable.Frequency distribution analysis of these proportions showed that the percent of frequency of some class limits was close to each other,and the ratios of percent of frequency of SSAL to SSAR were close to 1:1.To our knowledge,this is a novel finding in rice canopy morphology.According to this study,we can divide rice population into two groups in four Hybrid rice varieties.

关键词： Hybrid rice leaf lateral asymmetry rough side smooth side

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Heterosis Expression of Hybrid rice in Natural-and Short-Day Length Conditions

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rice science 2015年第2期22卷 81-88页

作者： HUANG Zhi-yuan ZHAO Bing-ran LV Qi-ming FU Xi-qin XIN Ye-yun YUAN Long-ping State Key Laboratory of Hybrid rice Hunan Hybrid Rice Research Center

Development of Hybrid rice is an important strategy to increase yields of irrigated rice in China. Day length is a highly important environmental factor for Hybrid rice adaptability, productivity and quality. Heterosis of Hybrid rice has been utilized under natural- （long） day length conditions in the middle and lower reaches plain of Yangtze River Valley in China for a long time. However, whether the Hybrid rice can show heterosis under short-day length conditions is unknown. In this study, we analyzed plant height, grain number per panicle, and other yield related traits of Hybrid rice Liangyoupeijiu （LYP9） and its parents （Pei＇ai 64S and 93-11） under natural- and short-day length conditions and compared the respective heterosis. Results showed that earlier heading, reduced plant height, and reduced grain number per panicle were found in these three varieties under short-day length conditions relative to those under natural-day length conditions. In either natural- or short-day length conditions, heterosis of LYP9 was mainly displayed in grain number per panicle and plant height. This study may help in breeding and selectina suitable Hybrid rice for different re qions with natural- or short-day length.

关键词： Hybrid rice heterosis photoperiod short-day length

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