摘要
以粳稻魔王谷和籼稻CO39配组衍生的280个重组自交系为材料, 2015年和2016年对其粒形、剑叶形态、株高性状进行了相关性分析和QTL检测。剑叶长分别与粒厚和株高存在极显著负相关和正相关,剑叶宽与粒宽存在极显著正相关。检测到17个粒形QTL,分布于第1、第2、第3、第4、第5、第6、第7、第9和第10染色体上,贡献率为3.51%～48.65%;其中,第3染色体RM6080-RM6283区间对粒长和千粒重兼具显著作用,第5染色体RM8211-RM3381区间同时影响粒宽和粒厚。检测到12个控制剑叶形态性状的QTL,分布于第1、第3、第4、第6、第7和第9染色体上,贡献率为4.26%～38.40%;有5个多效QTL区间,其中,第4染色体RM252-SFP4_6区间同时控制剑叶长、剑叶宽、剑叶面积和粒长,第9染色体RM257-RM3909区间同时影响剑叶面积和粒长。只检测到一个控制株高的QTL,位于第1染色体的RM6333-RM5536区间,是一个主效QTL,贡献率为28.76%。这些结果为进一步开展粒形、剑叶形态、株高基因的精细定位、克隆和分子辅助育种奠定了基础。
In this study,280 recombinant inbred lines(RIL)derived from a cross between japonica rice Mowanggu and indica CO39 were used to analyse correlations and detect QTLs for grain shape,flag leaf morphology and plant height in 2015 and 2016.The flag leaf length was significantly negatively and positively correlated with grain thickness and plant height,respectively.And there was a significant positive correlation between flag leaf width and grain width.Here,we identified 17 QTLs for grain shape traits distributed on chromosomes 1,2,3,4,5,6,7,9,and 10 respectively,which could explain 3.51%?48.65%of total phenotypic variance.Among of them,the region between markers RM6080 and RM6283 on chromosome 3 significantly influenced both grain length and thousand-grain weight,while RM8211?RM3381 interval on chromosome 5 influenced both grain width and grain thickness.On the other hand,12 QTLs controlling the flag leaf traits were identified on chromosomes 1,3,4,6,7,and 9,respectively,which explained 4.26%?38.40%of the phenotypic variance.In addition,five QTL regions showing pleiotropic effects were identified.For example,the marker RM252?SFP4_6 interval on chromosome 4 could control flag leaf length,flag leaf width,flag leaf area and grain length;and the RM257?RM3909 interval on chromosome 9 was responsible for flag leaf area and grain length.Furthermore,there was a major QTL controlling plant height was identified in the interval of RM6333?RM5536 on chromosome 1,which explained 28.76%of the phenotypic variance.All these results provide a foundation for fine mapping,cloning and marker assisted selection of favorable genes related to grain shape,flag leaf traits and plant height.
作者
彭伟业
孙平勇
潘素君
李魏
戴良英
PENG Wei-Ye;SUN Ping-Yong;PAN Su-Jun;LI Wei;DAI Liang-Ying(College of Plant Protection,Hunan Agricultural University,Changsha 410128,Hunan,China;State Key Laboratory of Hybrid Rice,Hunan Hybrid Rice Research Center,Changsha 410125,Hunan,China)
出处
《作物学报》
CAS
CSCD
北大核心
2018年第11期1673-1680,共8页
Acta Agronomica Sinica
基金
国家重点研发计划项目(2016YFD0300700)
湖南省自然科学基金项目(2016JJ3071)资助~~
关键词
水稻
粒形
剑叶
株高
QTL定位
rice
grain shape
flag leaf
plant height
QTL mapping
