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| 1 | Development and characterization of interspecific hybrids between Oryza sativa and O. latifolia by in situ hybridization显示文摘Oryza sativa and O. latifolia belong to the AA and CCDD genomes of Oryza, respectively. In this study, interspecific hybrids of these species were obtained using the embryo rescue technique. Hybrid panicle traits, such as long awns, small grain, exoteric large purple stigma, grain shattering and dispersed panicles, resemble that of the paternal parent, O. latifolia, whereas there is obvious heterosis in such respects as plant height, tillering ability and vegetative vigor. Chromosome pairing and the genomic components of the hybrid were subsequently investigated using genomic in situ hybridization (GISH) and fluorescent in situ hybridization (FISH) analysis. Based on the mitotic metaphase chromosome numbers of the root tips investigated, the hybrid is a triploid with 36 chromosomes. The genomic constitution of the hybrid is ACD. In the meiotic metaphase I of the hybrid pollen mother cell, poor chro- mosome pairing was identified and most of the chromosomes were univalent, which resulted in com- plete male sterility in the hybrid. | YI ChuanDeng TANG ShuZhu ZHOU Yong LIANG GuoHua GONG ZhiYun GU MingHong | 2008 | Chinese Science Bulletin2008，53，19： | 4 |
| 2 | 药用野生稻(CC)-栽培稻(AA)异源单体附加系MAAL8的遗传分析显示文摘[目的]通过对药用野生稻-栽培稻异源单体附加系MAAL8进行花药培养及其与栽培稻H1493回交,研究异源单体附加系的遗传特征。[方法]采用表型分析研究了后代分离比例,并采用SSR和甲基化分析研究了异源染色体的传递行为。[结果]在145个回交后代植株中有78株保留了MAAL8的卷叶标记性状,在32株花培植株中有5株为正常卷叶,2株为极端卷叶,其余为平叶植株。用14对SSR标记进行分析显示,在所有卷叶植株中可得到药稻特征带型,而在平叶植株中都没有。用11个多态性RFLP标记进行Methyla-tion-Sensitative Southern分析显示,有8个在AA和CC基因组之间的甲基化变异方式是不同的。[结论]MAAL8的异源染色体可经过减数分裂完整独立地传递给后代,并保持表型特征不变,且药稻的甲基化方式随着单条染色体的附加可在杂种后代中稳定遗传,甲基化的稳定性可能对异源染色体在栽培稻基因组环境中的相对独立遗传有一定作用。 | 刘如亮 刘虹 陈雁 覃瑞 李刚 | 2011 | 安徽农业科学2011，39，17： | 4 |
| 3 | Bph15在非洲栽培稻、药用野生稻和宽叶野生稻中的BAC-FISH比较物理定位显示文摘用覆盖抗褐飞虱基因Bph15的两个BAC克隆,即20M14(27kb)和64O9(36kb)作为探针,对非洲栽培稻、药用野生稻和宽叶野生稻体细胞染色体进行荧光原位杂交(FISH)。两个BAC克隆均被定位于非洲栽培稻和药用野生稻第4染色体的短臂上,杂交信号的百分距离分别为37.03±4.11和81.22±3.62,相应的信号检出率为41.18%和38.22%。在宽叶野生稻中,有两对同源染色体同时检出信号,分别定位于染色体的短臂和着丝粒区,信号距着丝粒平均百分距离分别为87.78±5.23和0,信号检出率为52.58%。由此推知,这两个BAC克隆在非洲栽培稻和药用野生稻的第4染色体分布同线且同区,并且在宽叶野生稻的DD基因组也存在Bph15基因的同源序列。在未封阻的情况下,BAC克隆在非洲栽培稻的多条染色体上有杂交信号,表明它和栽培稻C0t-1DNA在一定程度上具有同源性。上述结果初步显示Bph15在3个稻种染色体中的相对位置。文章讨论了Bph15在3个种间的关系,为有效分离和利用Bph15基因提供了有益的依据,对不同基因组及二倍体和四倍体中功能基因可能进化机制的分析提供了线索。 | 蓝伟侦 柳哲胜 李刚 覃瑞 | 2007 | 作物学报2007，33，4： | 1 |
| 4 | 药用野生稻(CC)-栽培稻(AA)异源单体附加系MAAL8的遗传分析(英文)显示文摘[目的]通过对药用野生稻-栽培稻异源单体附加系MAAL8进行花药培养及其与栽培稻H1493回交,研究异源单体附加系的遗传特征。[方法]采用表型分析研究了后代分离比例,并采用SSR和甲基化分析研究了异源染色体的传递行为。[结果]在145个回交后代植株中有78株保留了MAAL8的卷叶标记性状,在32株花培植株中有5株为正常卷叶,2株为极端卷叶,其余为平叶植株。用14对SSR标记进行分析显示,在所有卷叶植株中可得到药稻特征带型,而在平叶植株中都没有。用11个多态性RFLP标记进行Methylation-Sensitative Southern分析显示,有8个在AA和CC基因组之间的甲基化变异方式是不同的。[结论]MAAL8的异源染色体可经过减数分裂完整独立地传递给后代,并保持表型特征不变,且药稻的甲基化方式随着单条染色体的附加可在杂种后代中稳定遗传,甲基化的稳定性可能对异源染色体在栽培稻基因组环境中的相对独立遗传有一定作用。 | 刘如亮 刘虹 陈雁 覃瑞 李刚 | 2011 | Agricultural Science & Technology2011，12，5： | 0 |
| 5 | Comparative Analysis on Genomes from Oryza alta and Oryza latifolia by C_0t-1 DNA显示文摘In order to reveal the origin and evolutionary relationship between two CCDD genome species, Oryza alta and Oryza latifolia, fluorescence in situ hybridization (FISH) was adopted to analyze the genomes of the two species with C0t-1 DNA from O. alta as a probe. Karyotype was also comparatively analyzed between O. alta and O. latifolia based on their similar band patterns of the hybridization signals. There were a high homology and close relationship between O. alta and O. latifolia, however, the distinction between the hybridization signals was also clear. C0t-1 DNA was proved to be species- and genome type-specific. It is suggested that C0t-1 DNA-FISH could be more efficient to analyze the genomic relationship between different species. According to the comparative analysis of highly and moderately repetitive DNA sequences between the two allotetraploidy species, O. alta and O. latifolia, the possible origin and evolutionary mechanism of allotetraploidy of Oryza were discussed. | WANG De-bin WANG Yang Wu Qi ZHAO Hou-ming LI Gang QIN Rui WANG Chun-tai LIu Hong | 2010 | Rice science2010，17，3： | 0 |
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