中文摘要：极端气候事件（由不利气候变化导致）的气候模式改变和频率、强度增加会使稻田频遭水淹，并会引起褐飞虱的爆发，尤其是在泰国旱作区。泰国香米品种KDML105在泰国北部和东北部的旱作区广泛种植，该品种水稻不能抵抗洪水，且对褐飞虱极其敏感。本研究利用标记辅助回交法分别将两个主效QTL即Sub1和Qbph12从两种供体导入到KDML105中。本研究通过标记辅助选择将Sub1和Qbph12聚合到KDML105的遗传背景中，并对株型及籽粒品质特性进行严格的表型筛选。评估表明，相较于原来的KDML105来说最终筛选出的64个PLs的耐涝性及对褐飞虱的抗性均有显著提高。
外文摘要：Shifts in weather patterns and increases in the frequency and magnitude of extreme weather events resulting from unfavorable climate change have led to frequent flooding and brown planthopper outbreaks in rice fields, particularly those in rainfed lowland areas in Thailand. The traditional jasmine rice cultivar KDML105, which is popularly grown in rainfed lowland areas in north and northeast Thailand, is intolerant to flash flooding and is very susceptible to the brown planthopper. Two major QTL, Sub1 and Qbph12, were individually introgressed from two donors into KDML105 using the marker-assisted backcrossing method. In this study, we have pyramided Sub1 and Qbph12 in the genetic background of KDML105 via marker-assisted selection coupled with stringent phenotypic selection for plant type and physical grain quality traits. In total, sixty-four pyramid lines (PLs) were developed and characterized for submergence tolerance, brown planthopper resistance, important agronomic traits and physical and chemical grain quality. Evaluation of the PLs indicated their significantly enhanced submergence tolerance and brown planthopper resistance compared with the original KDML105 line. All PLs satisfied the KDML105 grain and cooking quality standards, although their agronomic characteristics showed significant variations in days to flowering, plant height and grain yield. These variations might allow breeders to select new versions of KDML105 that are suitable for different locations in rainfed lowland environments.
外文关键词：Pyramiding；Submergence tolerance；Brown planthopper resistance；Jasmine rice；KDML105；Sub1；Qbph12
作者：Korinsaka, Siriporn；Siangliwa, Meechai；Kotcharerk, Jate；等
作者单位：Kasetsart Univ
期刊名称：FIELD CROPS RESEARCH
期刊影响因子：2.927
出版年份：2016
出版刊次：3
点击下载：通过Sub1 与 Qbph12的基因聚合来改善泰国香米品种KDML105的耐涝性及其对褐飞虱的抗性