Genetic Analysis of Early Generation Stability in Rice

来源 :城市道桥与防洪 | 被引量 : 0次 | 上传用户:xieqi_1314
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The mechanism of early generation stability (EGS) in rice was studied via genetic analysis. Three types of crosses were made, namely between EGS varieties, EGS and conventional rice variety, and conventional rice varieties. The genetic analysis was based on the stable lines in F2 population. The stable lines may appear from some combinations of EGS rice crossing with each other and EGS rice crossing with conventional varieties at different frequencies, but stable lines didnt appear in conventional varieties crossing with conventional varieties. Genetic analysis results indicated that the EGS phenomena should just exist in special rice materials, and the frequency of stable lines was closely related to the EGS traits of parents. The EGS traits were neither qualitative nor quantitative traits, and they were controlled by neither dominant genes nor recessive genes. The EGS traits might be inherited by F1 single plant, and the traits of F3 and F4 were corresponded to those of F2 population, i.e. F3 and F4 lines derived from non-segregating F2 showed uniform agronomic traits, and those from segregating F2.did not. The agronomic traits of EGS lines were consistent with those of F1 single plant. On the other hand, when EGS lines occurred, the segregating lines in Mendelian manner were also observed in all F2 population of the same combination. It was suggested that the reason why the stable strains occurred might be a special factor to control (open/close) gene at the beginning of cell division in zygote, resulting in closing mitosis and opening somatic reduction. The somatic reduction of zygote resulted in recombination and homozygosity forming in F1 single plant,and some lines with uniform agronomic traits were observed in some lines of F2 population.
其他文献
切沟是黄土高原常见的地貌形态,是流域产沙的主要来源,而植被常被看作抑制切沟发育的关键因子,为探究退耕还林(草)工程以来切沟发育速率的特征,本研究使用吴起研究区间隔6年
目的探究亚段性肝动脉介入化疗栓塞联合华蟾素治疗中晚期肝癌的临床疗效。方法选择中晚期肝癌患者47例,根据治疗情况分为STACE组和TACE组;两组病人术后均随机分为华蟾素联合
以萘为原料,采用AlCl3催化合成和热转化处理二步法制备了高软化点、低QI含量的优质萘系中间相沥青。通过分析表征不同条件下合成的萘沥青经热转化后所得中间相沥青的性质和中
不知不觉来协和医院普通内科已有10余天了。10余天之前我还是浙江大学附属第一医院的实习大夫,每天专心管着三四张病床,偶尔带上两三个见习大夫,问病史、查体、换药……如今,
他汀药物对心血管疾病的好处众所周知,几乎所有指南都会强烈推荐他汀治疗作为心血管疾病的一级或二级预防。然而,许多患者在服用他汀类药物出现不良反应,如肌肉疼痛和胃肠道或神经症状,便不顾医嘱中断治疗。事实上,若继续治疗或许效果会更好。  来自北京协和医学院的张化冰等在美国布列根和妇女医院以及麻省总医院进行了回顾性队列研究,旨在探讨持续他汀治疗(出现不良后12个月内)和临床预后之间的关系,该研究全文于7月
期刊
目的对剖腹产患者的手术护理措施进行深入研究.方法选取我院2011年10月~2012年5月收治的剖腹产患者126例,对其资料进行回顾性分析,并对手术室护理措施进行总结.结果126例患者
目的:分析我院2004年8月~2005年11月临床分离的543株铜绿假单胞菌对不同种类抗菌药物的耐药性,为临床合理用药提供参考。方法:收集临床分离出的543株铜绿假单胞菌,用K-B法进行
苏州农业职业技术学院(以下简称苏农),始创于1907年(苏州府官立农业学堂)。1912年苏农设立园艺科,开创了我国园艺职业教育的先河,培养了章守玉等一批园艺先驱、学术精英和推
微晶石墨的高纯化一直是制约其工业应用的一个技术难题。本文采用HCl-HF法对微晶石墨进行提纯,研究了盐酸、氢氟酸的浓度和反应时间等因素,确定了最佳工艺参数,探讨了纯化机理。