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Comparative DNA-methylome and transcriptome analysis reveals heterosis-and polyploidy-associated epigenetic changes in rice

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The Crop Journal 2023年第2期11卷 427-437页

作者： Xiaolan Rao Jun Ren Wei Wang Rongrong Chen Qian Xie Yanqing Xu Dongmei Li Zhaojian Song Yuchi He detian cai Pingfang Yang Shiyou Lyu Li Li Wei Liu Xianhua Zhang School of Life Sciences Hubei UniversityWuhan 430062HubeiChina Wuhan Polyploid Bio-Technology Limited Company Wuhan 430345HubeiChina State Key Laboratory of Hybrid Rice Hunan Hybrid Rice Research CenterChangsha 410125HunanChina Institute for Regenerative Medicine Shanghai East HospitalSchool of Life Sciences and TechnologyTongji UniversityShanghai 200123China

Heterosis and polyploidy have an overwhelming influence on plant ***,polyploid rice hybrids have been used to breed new rice varieties because they combine the advantages of both heterosis and *** this study,we generated six rice lines:autotetraploid rice hybrids and their autotetraploid parents,diploid donors,and hybrids of the diploid *** investigate the molecular mechanism controlling the effects of both hybridization and polyploidization,we performed bisulfite and RNA sequencing on young panicles at the pollen meiosis stage to compare the DNA metabolomes and transcriptomes among the six rice *** hybrids lines were hypermethylated compared to their corresponding parents and the autotetraploid lines showed globally increased DNA methylation of their transposable elements compared to the diploid *** alteration in DNA methylation level corresponded to the differential gene expressions among the rice genotypes,suggesting that methylation changes induced by polyploidization and hybridization may affect gene *** of gene candidates were identified that may be associated with heterosis and *** results provide DNA information that can be used to investigate epigenetic modification during heterosis and polyploidy in rice.

关键词： Oryza sativa Neotetraploid rice Heterosis Whole genome duplication Epigenetic changes

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Correlation, Regression and Path Analyses of Seed Yield Components in <i>Crambe abyssinica</i>, a Promising Industrial Oil Crop

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American Journal of Plant Sciences 2013年第1期4卷 42-47页

作者： Banglian Huang Yiming Yang Tingting Luo Shu Wu Xuezhu Du detian cai Eibertus N. van Loo Bangquan Huang College of Life Science Hubei University Wuhan China Plant Research International Wageningen the Netherlands

In the present study correlation, regression and path analyses were carried out to decide correlations among the agro- nomic traits and their contributions to seed yield per plant in Crambe abyssinica. Partial correlation analysis indicated that plant height (X1) was significantly correlated with branching height and the number of first branches (P 2) was significantly correlated with pod number of primary inflorescence (P 3) was significantly correlated with number of secondary branches (P -grain weight (P 4) was significantly correlated with seed yield per plant (P 7) was significantly correlated with seed yield per plant (P -grain weight (P -grain weight (X8) was significantly correlated with seed yield per plant (P -grain weight contributed significantly to seed yield per plant at P 7) and 1000-grain weight (X8) to seed yield per plant (Y) is Y = 0.006 X7 + 1.222 X8 - 7.191. The path coefficient of pod number per plant to seed yield per plant was 0.967 and that of 1000-grain weight was 0.194. The determination coefficient of pod number per plant and 1000-grain weight to seed yield per plant was 0.983 and the determination coefficient of other agronomic traits was 0.130. Coefficient of variance indicated that the length of primary inflorescence showed the greatest variation, followed by seed yield per plant, pod number per plant, number of secondary branches, branching height, pod number of primary inflorescence, number of first branches, seed yield per plot, 1000-grain weight and plant height. It was suggested that seed yield per plant in Crambe might be improved by increasing the pod number per plant through selection or cultivation, but the negative correlation between pod number per plant and 1000-grain weight also needs to be considered.

关键词： Correlation Crambe abyssinica Path Analysis Regression Seed Yield Components

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The Cloning of Meiotic Genes in Polyploid Rice

The Cloning of Meiotic Genes in Polyploid Rice

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湖北省遗传学会、江西省遗传学会2006年学术年会暨学术讨论会

作者： Hu Yaping, Zheng Sihua, Song Zhaojian, Chen Dongling, HeYuchi, cai detian (College of Life Science, Hubei University, Wuhan 430062)

Owing to the chromosomes imbalance distribution during the meiosis process, polyploidy rice has high frequency of multivalent and lagging chromosomes, resulting in partial sterile, and exhibiting low seed set rate, which eliminates the morphologic superiority and reduces their yields. By utilizing the strategy "breed super rice varieties via double superiority of distant hybridization and polyploidization", our lab has bred two lines of polyploid rice featured with meiosis stable lines of PMeS (Polyploid Meiosis Stability), which has high seed setting rate. While crossed with other polyploid rice lines, their seed setting rate generally increased, breaking through the bottleneck of polyploid rice breeding. Till up now, the reason for unstability of the molecular mechanism of polyploid rice meiosis is still unknown. Therefore, it's urgent to study the molecular mechanism of PMeS lines.

关键词： Meiotic genes, OsPHSl, OsMND1, RNAi, Gene transformation

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Molecular characterization of the OsSPO11-1 in rice

Molecular characterization of the OsSPO11-1 in rice

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湖北省植物生理学会第十五次学术研讨会

作者： Dong Qianhua Xu Ling Hu Yaping Song Zhaojian Chen Dongling cai detian~* College of Life Science,Hubei University,Wuhan 430062

The Spo11 protein of yeast has been found to be covalently bound to double-strand breaks (DSBs) during the early stages of meiosis,demonstrating a unique role of the protein in the formation of these *** of the SPO11 gene have been found in various eukaryotes,indicating that the machinery involved in meiotic recombination is conserved in *** take advantage of the sequence information of the SPO11-1,which already cloned in other plants to find out their homology in rice genome sequence database and full-length eDNA sequence *** we cloned the OsSPO11-1,which is constituted by fifteen exons,with 1146bp long CDS encode a 381 amino acid *** contains five conserved protein motifs that are homology to the family of SPO11 *** OsSPO11-1 gene over-express vector and RNAi vector were constructed in efforts to study its role in the meiosis process in both diploid rice and polyploid rice.

关键词： Osspo11-1 RNAi meiosis polyploid rice

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小麦和无融合生殖小麦草杂交后代(BC_2F_2)的生物学特性及根尖染色体数目变化研究

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华中农业大学学报 2001年第3期20卷 205-209页

作者：栗茂腾蔡得田黄利民马平福华中农业大学作物遗传改良国家重点实验室武汉430070 湖北大学生命科学院武汉430064

对小麦 (Triticumaestivum)和无融合生殖小麦草 (Elymusrectisetus)的杂种后代 (BC2 F2 )生物学特性和根尖染色体数目变化情况进行了的研究。结果表明 ,BC2 F2 的生物学特性处于小麦和小麦草之间 ,但更趋向于小麦 ,这是由于杂交后代经 ... 详细信息

对小麦 (Triticumaestivum)和无融合生殖小麦草 (Elymusrectisetus)的杂种后代 (BC2 F2 )生物学特性和根尖染色体数目变化情况进行了的研究。结果表明 ,BC2 F2 的生物学特性处于小麦和小麦草之间 ,但更趋向于小麦 ,这是由于杂交后代经 2次回交所致。根尖染色体检查发现 ,BC2 F2 的体细胞染色体数目存在 1个很大的变异范围 ,从 2 9条到 6 9条不等 ,但大部分细胞内的染色体数目是 42条。杂种后代的体细胞染色体数目的变化一方面与远缘杂交有关。

关键词：小麦小麦草无融合生殖生物学特性根尖染色体

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正常开颖授粉水稻T168和闭颖授粉水稻CL01的浆片结构比较

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华中农业大学学报 2005年第6期24卷 564-569页

作者：栗茂腾臧新刘建民余龙江蔡得田华中科技大学生命科学与技术学院武汉430074 郑州大学生物工程系郑州450001 湖北大学生命科学院武汉430062

用Olympus AH3显微镜和日立透射电镜对闭颖授粉水稻CL01和正常开颖授粉水稻T168浆片的显微和亚微结构进行了观察。显微观察结果表明,闭颖授粉水稻材料维管束的数目和结构与正常开颖授粉水稻材料都有明显差异,闭颖授粉水稻材料浆片小且... 详细信息

用Olympus AH3显微镜和日立透射电镜对闭颖授粉水稻CL01和正常开颖授粉水稻T168浆片的显微和亚微结构进行了观察。显微观察结果表明,闭颖授粉水稻材料维管束的数目和结构与正常开颖授粉水稻材料都有明显差异,闭颖授粉水稻材料浆片小且维管束数少,为8条左右,仅为正常开颖授粉水稻材料的一半。超微结构表明:开花前1 d、开花当天及开花后,闭颖授粉水稻不管是液泡的形成过程还是线粒体变化过程都与开颖授粉水稻有明显的不同。闭颖授粉水稻在开花过程中没有大量长形或椭圆形线粒体积累,再加上其浆片小且维管组织不发达,从而导致了闭颖。

关键词：闭颖授粉开颖授粉浆片

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Uniform arrays of carbon nanotubes applied in the field emission devices

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Science China(Physics,Mechanics & Astronomy) 2013年第11期56卷 2081-2084页

作者： LI detian CHENG YongJun cai Min YAO JinLi CHANG Peng Lanzhou Institute of Physics Key Laboratory for Magnetism and Magnetic Materials of MOE Lanzhou University

Carbon nanotubes(CNTs)were grown into anodic aluminum oxide(AAO)channels by chemical vapor deposition(CVD)using C2H2/N2mixtures as feeding gas,which can be used as field *** bottom surface of AAO template was etched slightly and the tips of CNTs were explored as the field emission arrays which were uniform and *** emission characterization showed a low turn-on field about 3.25 V/m and high emission current about 30 mA/cm2with the electric field about 4 V/*** superior field emission characteristics could be attributed to low density of vertical CNTs and higher conductivity of the substrate.

关键词： carbon nanotubes anodic aluminum oxide template field emission

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不同叶龄移栽对四倍体水稻T569农艺性状和产量的影响

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种业导刊 2019年第9期 14-17页

作者：郑明宋兆健张献华隗志松朱永生蔡得田武汉多倍体生物科技有限公司湖北武汉430345 孝感市农业科学院湖北孝感432000 湖北大学湖北武汉430062 武汉市农业科学院湖北武汉430345

为了探究不同叶龄四倍体水稻移栽对其产量构成因素和农艺性状的影响,选择3种叶龄(5.5、6.5、7.5叶龄)于2017年在海南省对四倍体水稻T569进行移栽试验。结果表明,移栽时叶龄对四倍体水稻T569产量的影响较大,表现为5.5叶龄移栽水稻>7.5叶... 详细信息

为了探究不同叶龄四倍体水稻移栽对其产量构成因素和农艺性状的影响,选择3种叶龄(5.5、6.5、7.5叶龄)于2017年在海南省对四倍体水稻T569进行移栽试验。结果表明,移栽时叶龄对四倍体水稻T569产量的影响较大,表现为5.5叶龄移栽水稻>7.5叶龄移栽水稻>6.5叶龄移栽水稻。与此同时,随着移栽叶龄增大,四倍体水稻T569的播始历期和全生育期延迟。3个处理T569四倍体水稻的产量构成因素呈曲线波动趋势,每穗粒数、每穗实粒数、结实率、千粒质量的波动趋势一致,均表现为5.5叶龄移栽水稻>7.5叶龄移栽水稻>6.5叶龄移栽水稻;有效穗数表现为7.5叶龄移栽水稻>5.5叶龄移栽水稻>6.5叶龄移栽水稻。

关键词：四倍体水稻叶龄移栽产量构成农艺性状

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Solution of the Bottleneck Problems in Polyploid Rice Breeding

Solution of the Bottleneck Problems in Polyploid Rice Breedi...

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湖北省遗传学会、江西省遗传学会2006年学术年会暨学术讨论会

作者： detian cai //, Jianguo Chen, Dongling Chen, Zhaojian Song, Wei Zhang, Chunhua Yang, Aiyun Wang, Youqi Liu, Chaoqun Du, Qin Peng, Yaping Hu, Lixia Zhang, Jianxin Liu, Zifan Yang, Guangcun He, Yunchun Song, Lijia Li, Longping Yuan, Xinggui Lu College of Life Sciences, Hubei University, Wuhan, 430062, China College of Life Sciences, Wuhan University, Wuhan, 430072, China National Hybrid Rice Research and Development Center in China, Changsha, 410125, China Hubei Agricultural Academy, Wuhan, 430070, China

To solve the potential crises of food shortage, strategies for the breeding of super rice have been suggested. They based on the rationale of intervarieties cross and diploidy. The best hybrid rice combination just increased yield 15% more than control varieties and did not reach the demand of resolving the crises of food shortage. However, the duplication increases of yield in wheat, cotton, rape-seed and other crops during their evolution from diploid to polyploid gives us inspiration. A new strategy used double heterosis of wide cross and polyploidization to breed super rice was developed by us. Its principle is different from conventional cross and hybrid rice breeding. Three key techniques including utilization of the parent with relative distance, wide compatibility and Ph (pairing homoeologous) genes were applied. Here we showed the results from using the strategy to break through two bottlenecks in polyploid rice breeding. A technique program of inducing polyploid rice in high frequency (46.7%) was established (Fig 1), and two lines of polyploid meiosis stability (PMeS) gene with high rate of seed set alike Ph functioned in wheat were selected (Fig 2,3). More than 150 combinations of polyploid intersubspecific rice with powerful heterosis have been developed. The demonstration culture also showed the more advantage than diploid (Fig 4). The fact has proved that the bottleneck problems have been dissolved. Polyploid rice breeding can be used in super rice breeding.

关键词： Ployploid rice Wide cross Heterosis Meiosis PMeS

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四倍体及二倍体毛泡桐截干再生特性研究

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湖北林业科技 2011年第3期40卷 22-25,54页

作者：梅辉王莉宋兆建王维张献华陈冬玲何玉池蔡得田湖北大学生命科学学院武汉430062 武汉生物工程学院生物技术系武汉430415

为掌握人工诱导四倍体毛泡桐保持多倍体特性情况及毛泡桐截干再生特性,笔者以5a生四倍体及二倍体毛泡桐截干再生苗为材料,对截干再生苗的倍性、出芽数、生长速率、叶片特性、叶绿素含量及光合特性等进行研究。结果表明:四倍体毛泡桐截... 详细信息

为掌握人工诱导四倍体毛泡桐保持多倍体特性情况及毛泡桐截干再生特性,笔者以5a生四倍体及二倍体毛泡桐截干再生苗为材料,对截干再生苗的倍性、出芽数、生长速率、叶片特性、叶绿素含量及光合特性等进行研究。结果表明:四倍体毛泡桐截干再生苗能很好地保持其多倍体倍性,相对于二倍体来说,出芽数较少,生长较缓慢;气孔增大,气孔密度降低;叶片叶绿素含量降低,但光合速率增大。叶片形状二者也有很大差异,四倍体为锯齿状卵圆形而二倍体为全缘五边形。另外,嵌合体很少见,显现了组织培养诱导多倍体的优势。而且多倍体毛泡桐节间变短、叶圆厚和花增大的特点很有利于园林观赏乔木花卉的培育。

关键词：毛泡桐多倍体生长习性光合特性

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