Better understanding of genotype-by-environment interaction （GEI） is expected to provide a solid foundation for genetic improvement of crop productivity especially under drought-prone environments. To elucidate the ...Better understanding of genotype-by-environment interaction （GEI） is expected to provide a solid foundation for genetic improvement of crop productivity especially under drought-prone environments. To elucidate the genetic basis of the plant and ear height, 2 F2：3 populations were derived from the crosses of Qi 319 × Huangzaosi （Q/H） and Ye 478 × Huangzaosi （Y/H） with 230 and 235 families, respectively, and their parents were evaluated under 3 diverse environments in Henan, Beijing, and Xinjiang, China during the year of 2007 and 2008, and all the lines were also evaluated under water stress environment. The mapping results showed that a total of 21 and 12 QTLs were identified for plant height in the Q/H and Y/H population, respectively, and 24 and 13 QTLs for ear height, respectively. About 56 and 73% of the QTLs for 2 traits did not present significant QTL-by-environment interaction （QE1） in the normal joint analyses for Q/H and Y/H population, respectively, and about 73% of the QTLs detected did not show significant QEI according to joint analyses for stress condition in Q/H. Most of the detected major QTLs exhibited high stability across different environments. Besides, several major QTLs were detected with large and consistent effect under normal condition （Chr. 6 and 7 in Q/H; Chr. 1, 3 and 9 in Y/H）, or across 2 water regimes （Chr. 1, 8 and 10 for in Q/H）. There were several constitutive QTLs （3 for Q/H and 1 for Y/H） with no or minor QTL-by-environment for the 2 populations. Finally, we found several genomic regions （Chr. 1, 10, etc.） to be co-located across the populations, which could provide useful reference for genetic improvement of these traits in maize breeding programs. Comparative genomic analysis revealed that 3 genes/genetic segments associated with plant height in rice were orthologous to these 3 identified genomic regions carrying the major QTLs for plant and ear height on Chr. 1, 6, and 8, respectively.展开更多
目的探讨在中国肺腺癌患者中,吸烟对组织形态学特征及预后的影响。方法 266例原发性肺腺癌患者按照2011年肺腺癌国际肺癌研究协会/美国胸科学会/欧洲呼吸学会(International Association for the Study of Lung Cancer/American Thoraci...目的探讨在中国肺腺癌患者中,吸烟对组织形态学特征及预后的影响。方法 266例原发性肺腺癌患者按照2011年肺腺癌国际肺癌研究协会/美国胸科学会/欧洲呼吸学会(International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society, IASLC/ATS/ERS)新分类方法进行组织学亚型重新分类,分析吸烟状况等各种临床病理特征与组织学亚型的关系以及对患者术后生存期的影响。结果组织学亚型主要为腺泡状为主型(30.1%)、乳头状为主型(26.7%)、实体状为主型(25.9%)、贴壁状为主型(11.7%)。吸烟状况与组织学亚型有关,实体状为主型患者组中,吸烟患者所占比例高于不吸烟患者,而其它亚型组中则均为不吸烟患者所占比例更高(P<0.05)。Cox比例风险回归模型分析显示,在整体患者中,组织学亚型及TNM分期是术后生存期的预测因子;将患者分为吸烟患者和不吸烟患者,TNM分期在两类患者中均为术后生存期的预测因子,而组织学亚型则只在吸烟患者中显示对预后有显著性影响[标准偏回归系数(B)=0.898,相对危险度(RR)=2.455],与非实体状为主型患者比较,实体状为主患者的预后明显较差。结论吸烟与实体状为主亚型关联,并进一步对预后造成影响。展开更多
基金supported by grants provided by the Ministry of Science and Technology of China(2006CB101700,2009CB118401,2006BAD13B03)National Natural Science Foundation of China(30730063)
文摘Better understanding of genotype-by-environment interaction （GEI） is expected to provide a solid foundation for genetic improvement of crop productivity especially under drought-prone environments. To elucidate the genetic basis of the plant and ear height, 2 F2：3 populations were derived from the crosses of Qi 319 × Huangzaosi （Q/H） and Ye 478 × Huangzaosi （Y/H） with 230 and 235 families, respectively, and their parents were evaluated under 3 diverse environments in Henan, Beijing, and Xinjiang, China during the year of 2007 and 2008, and all the lines were also evaluated under water stress environment. The mapping results showed that a total of 21 and 12 QTLs were identified for plant height in the Q/H and Y/H population, respectively, and 24 and 13 QTLs for ear height, respectively. About 56 and 73% of the QTLs for 2 traits did not present significant QTL-by-environment interaction （QE1） in the normal joint analyses for Q/H and Y/H population, respectively, and about 73% of the QTLs detected did not show significant QEI according to joint analyses for stress condition in Q/H. Most of the detected major QTLs exhibited high stability across different environments. Besides, several major QTLs were detected with large and consistent effect under normal condition （Chr. 6 and 7 in Q/H; Chr. 1, 3 and 9 in Y/H）, or across 2 water regimes （Chr. 1, 8 and 10 for in Q/H）. There were several constitutive QTLs （3 for Q/H and 1 for Y/H） with no or minor QTL-by-environment for the 2 populations. Finally, we found several genomic regions （Chr. 1, 10, etc.） to be co-located across the populations, which could provide useful reference for genetic improvement of these traits in maize breeding programs. Comparative genomic analysis revealed that 3 genes/genetic segments associated with plant height in rice were orthologous to these 3 identified genomic regions carrying the major QTLs for plant and ear height on Chr. 1, 6, and 8, respectively.
文摘目的探讨在中国肺腺癌患者中,吸烟对组织形态学特征及预后的影响。方法 266例原发性肺腺癌患者按照2011年肺腺癌国际肺癌研究协会/美国胸科学会/欧洲呼吸学会(International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society, IASLC/ATS/ERS)新分类方法进行组织学亚型重新分类,分析吸烟状况等各种临床病理特征与组织学亚型的关系以及对患者术后生存期的影响。结果组织学亚型主要为腺泡状为主型(30.1%)、乳头状为主型(26.7%)、实体状为主型(25.9%)、贴壁状为主型(11.7%)。吸烟状况与组织学亚型有关,实体状为主型患者组中,吸烟患者所占比例高于不吸烟患者,而其它亚型组中则均为不吸烟患者所占比例更高(P<0.05)。Cox比例风险回归模型分析显示,在整体患者中,组织学亚型及TNM分期是术后生存期的预测因子;将患者分为吸烟患者和不吸烟患者,TNM分期在两类患者中均为术后生存期的预测因子,而组织学亚型则只在吸烟患者中显示对预后有显著性影响[标准偏回归系数(B)=0.898,相对危险度(RR)=2.455],与非实体状为主型患者比较,实体状为主患者的预后明显较差。结论吸烟与实体状为主亚型关联,并进一步对预后造成影响。
