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直播早籼稻品种苗期耐冷性鉴定
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作者 武志峰 唐双勤 +6 位作者 李祖军 李辉婕 曾研华 曾勇军 潘晓华 石庆华 吴自明 《江西农业学报》 CAS 2021年第7期1-5,12,共6页
以在江西地区大面积种植的45个早籼稻品种为材料,设置5℃、8℃、11℃、25℃(对照)4个温度处理,对幼苗的生物量、最长根长、茎基宽、根数、苗高、叶长、根系体积等指标进行观察,并应用主成分分析、模糊数学的隶属函数法和聚类分析法探讨... 以在江西地区大面积种植的45个早籼稻品种为材料,设置5℃、8℃、11℃、25℃(对照)4个温度处理,对幼苗的生物量、最长根长、茎基宽、根数、苗高、叶长、根系体积等指标进行观察,并应用主成分分析、模糊数学的隶属函数法和聚类分析法探讨了直播早籼稻品种苗期耐冷性的鉴定方法,并筛选出了耐冷性品种。结果表明;水稻苗期在遭遇低温后各项生长指标较正常温度(CK)明显下降,其中5℃处理下各指标变异系数均明显高于其他低温处理的,因此5℃适合作为耐低温性鉴定的温度;苗高和生物量最能代表早稻幼苗对低温的响应状况,可作为苗期耐冷性鉴定的评价指标;初步将供试早稻品种分为3类:第Ⅰ类包括五丰优623、湘早籼6号、淦鑫203等15个品种,为耐冷性品种;第Ⅱ类包括陵两优661、陵两优7717、陵两优0516等17个品种,为中等耐冷性品种;第Ⅲ类包括两优287、中嘉早17及株两优819等13个品种,为冷敏感品种。 展开更多
关键词 直播早稻 苗期 低温 耐冷性 隶属函数 鉴定
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直播早籼稻品种芽期耐淹性鉴定研究 被引量:11
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作者 钟艳平 李祖军 +8 位作者 唐双勤 武志峰 舒金贵 曾研华 谭雪明 曾勇军 石庆华 潘晓华 吴自明 《江西农业大学学报》 CAS CSCD 北大核心 2020年第1期1-9,共9页
【目的】直播早稻在播种后常面临田间整地不平造成积水而影响成苗,筛选耐淹性品种以及鉴定水稻芽期耐淹性对直播水稻生产具有重要意义。【方法】本研究通过对41个早籼稻品种芽期进行淹水处理,调查不同品种的成苗率、胚芽鞘、苗高、根长... 【目的】直播早稻在播种后常面临田间整地不平造成积水而影响成苗,筛选耐淹性品种以及鉴定水稻芽期耐淹性对直播水稻生产具有重要意义。【方法】本研究通过对41个早籼稻品种芽期进行淹水处理,调查不同品种的成苗率、胚芽鞘、苗高、根长、根数、地上部生物量、根系生物量以及根冠比。通过主成分分析法和聚类分析来探讨直播早稻耐淹性评价标准和筛选耐淹品种。【结果】结果表明,水稻幼苗根冠比和根系生物量在主成分分析中所占贡献率最大,最能体现淹水胁迫的耐受力的差异。聚类分析将41个早籼稻品种划分为强耐淹、中度耐淹和不耐淹3种类型,其中株两优829、株两优35、株两优08、株两优22、陵两优7108、陵两优722、五丰优157、五丰优286、优I2009、优I2058、温229为强耐淹品种,陆两优996、优I651等20份为中度耐淹品种;淦鑫203、中嘉早17等10份为较敏感型品种。【结论】筛选出来芽期耐淹能力较强的11个水稻品种,可为水稻品种选育及指导生产提供参考。 展开更多
关键词 早籼稻 芽期耐淹性 主成分分析 聚类分析
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芽期低温胁迫对早籼稻生长特性及产量的影响 被引量:6
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作者 何汛锋 唐双勤 +7 位作者 田雪飞 武志峰 曾研华 曾勇军 石庆华 潘晓华 吴自明 李辉婕 《南方农业学报》 CAS CSCD 北大核心 2020年第12期2911-2918,共8页
【目的】研究芽期低温胁迫对早籼稻生长特性、生理特性及产量形成的影响,为其高产和稳产提供理论依据。【方法】以耐冷性品种陵两优7108和湘早籼6号,冷敏感品种株两优819和中嘉早17为试验材料,以自然条件下育秧为对照(CK),于芽期(芽长5 ... 【目的】研究芽期低温胁迫对早籼稻生长特性、生理特性及产量形成的影响,为其高产和稳产提供理论依据。【方法】以耐冷性品种陵两优7108和湘早籼6号,冷敏感品种株两优819和中嘉早17为试验材料,以自然条件下育秧为对照(CK),于芽期(芽长5 mm)进行低温(8℃)处理,处理10 d后将幼苗移至秧田恢复正常生长环境,移栽前1 d测定各处理不同品种的秧苗素质相关指标,并进行成熟期产量与产量构成因素分析。【结果】早籼稻在芽期遭受低温冷害导致各品种出苗率显著降低(P<0.05,下同),秧苗素质各指标不同程度下降,其中耐冷品种下降程度较小。低温胁迫处理下不同品种幼苗叶片的超氧化物歧化酶(SOD)及过氧化物酶(POD)活性均显著升高,可溶性蛋白含量及丙二醛(MDA)含量均显著增加,其中耐冷品种具有更强的保护性酶活性。与CK相比,芽期低温胁迫处理恢复生长后,不同品种的生育期延长,穗长和着粒密度降低,且耐冷品种降低幅度小于冷敏感品种。与CK相比,各品种芽期低温胁迫后的产量均降低,其中冷敏感品种株两优819和中嘉早17分别下降27.41%和20.90%,耐冷品种湘早籼6号和陵两优7108分别下降17.74%和12.82%。有效穗数和结实率下降是导致冷敏感品种减产的主要原因。【结论】芽期低温胁迫可降低早稻出苗率及秧苗素质,使植株生长受损,生育期延长,产量下降。综合生长特性和产量表现,耐冷品种陵两优7108和湘早籼6号受芽期低温影响较小,可作为耐低温双季直播早稻的推荐品种。 展开更多
关键词 早籼稻 低温胁迫 生长特性 产量
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Phenotypic analysis of a dwarf and deformed flower3 (ddf3) mutant in rice (Oryza sativa L.) and characterization of candidate genes 被引量:2
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作者 WANG Yu-peng tang shuang-qin +2 位作者 WU Zhi-feng SHI Qing-hua WU Zi-ming 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第5期1057-1065,共9页
Dwarf mutants are the crucial resources for molecular biology research and rice breeding. Here, a rice mutant, dwarf and deformed flower3(ddf3), was identified in tissue culture of Oryza sativa cv. Dongjin. Compared... Dwarf mutants are the crucial resources for molecular biology research and rice breeding. Here, a rice mutant, dwarf and deformed flower3(ddf3), was identified in tissue culture of Oryza sativa cv. Dongjin. Compared with wild type, the ddf3 mutant exhibited severe dwarfism, a greater number of tillers and significantly decreased fertility. In addition, leaf length, panicle length, and grain length, were significantly shorter. All internodes of ddf3 were shorter than those of wild type, and histological analysis revealed that internode cell elongation was significantly inhibited in ddf3. In the ddf3 mutant, pollen activity was significantly decreased, and the development of most stigmas was abnormal. Genetic analysis indicated that the ddf3 mutant phenotypes are controlled by a single or tightly linked nuclear genes. Using an F2 mapping population generated from a cross between ddf3 and Yangdao 6(9311), the DDF3 gene was mapped to a 45.21-kb region between insertion-deletion(In Del) markers M15 and M16 on the long arm of chromosome 7. Sequencing revealed a 13.98-kbdeletion in this region in the ddf3 mutant genome that resulted in the complete or partial deletion of ZF(DHHC type zinc finger protein), EP(expressed protein), and FH2(actin-binding FH2 domain-containing protein) genes. Quantitative RT-PCR analyses revealed that in wild type, the transcript levels of FH2 were almost the same in all organs, while ZF was mainly expressed in the panicle, and no expression of EP was detected in any organ. Based on these results, ZF and FH2 could be potential DDF3 candidate genes involved in the regulation of rice morphology and flower organ development. Our work has laid the foundation for future functional analysis of these candidate genes and has provided a profitable gene resource for rice breeding for increased fertility in the future. 展开更多
关键词 rice dwarf and deformed flower 3 mapping DHHC-type actin-binding FH2 domain
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Silencing of Os XDH reveals the role of purine metabolism in dark tolerance in rice seedlings
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作者 HAN Rui-cai Adnan Rasheed +5 位作者 WANG Yu-peng WU Zhi-feng tang shuang-qin PAN xiao-hua SHI Qing-hua WU Zi-ming 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第8期1736-1744,共9页
Xanthine dehydrogenase(XDH) is a crucial enzyme involved in purine metabolism. To evaluate the effect of XDH deficiency on rice growth during dark treatment, wild type(WT) Nipponbare(Oryza sativa L.) and two independe... Xanthine dehydrogenase(XDH) is a crucial enzyme involved in purine metabolism. To evaluate the effect of XDH deficiency on rice growth during dark treatment, wild type(WT) Nipponbare(Oryza sativa L.) and two independent transgenic lines with severe RNAi suppression(xdh3 and xdh4) were used in the present experiment. Under normal growth conditions, chlorophyll levels and biomass were indistinguishable between WT and the two RNAi transgenic lines, but XDH enzyme activity and ureide levels were suppressed in XDH RNAi transgenic lines. When XDH RNAi transgenic lines were subjected to dark treatment, chlorophyll content and biomass were significantly decreased, while O~–· production rate and malonaldehyde(MDA) were significantly increased compared to WT. The spraying test of exogenous allantoin raised chlorophyll content and biomass and reduced O~–· production rate and MDA in WT and both transgenic lines, and it also simultaneously reduced differences between RNAi and WT plants caused by XDH deficiency in growth potential and anti-oxidative capacity under dark treatment. These results suggested that fully functional purine metabolism plays an important role in reducing the sensitivity of rice seedlings to dark stress. 展开更多
关键词 xanthine dehydrogenase rice seedlings dark tolerance ALLANTOIN purine metabolism
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