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Fine mapping and characterization of two novel quantitative trait loci for early seedling growth in rice
Cheng, Peng; Cao, Ling-Jie; Bai, Chen; Ashikari, Motoyuki1; Song, Xian-Jun
2021
发表期刊PLANTA
ISSN0032-0935
卷号253期号:2
摘要Main conclusionTwo novel QTLs for early seedling growth in rice were fine mapped, with one of which to a 4-kb identical to the known GW6a gene, and another one to a 43-kb region that contains six candidate genes.AbstractLeaves are extremely important for plant photosynthesis: the size and shape of which determine the rate of transpiration, carbon fixation and light interception, and their robust growth at seedling stage endow crops with the ability to compete with weeds. So far, many genes for the traits have been cloned with mutants; however, identification of those quantitative trait loci (QTLs) that control early seedling growth has seldom been reported. In this study, we report the identification of two QTLs, qLBL1 and qLBL2 on the rice chromosome 6 for leaf blade length at early seedling stage. Fine mapping revealed that qLBL1 was placed into a 4-kb, and qLBL2 was delimited to a 43-kb genomic interval. We further found that LBL1 was equivalent to the known grain-size gene GW6a and the qLBL2 region contains 6 candidate genes. Genetic analysis using nearly isogenic lines and transgenic rice plants revealed that both genetic factors were positive regulators. The genetic effects were mainly due to alterations of cell division by cytological observations. RT-qPCR results showed that LBL1 was preferentially expressed in leaf blades, and consistently, histochemical staining of pGW6a::GUS plants showed that GUS signal was strong in the vascular tissues of leaf blade of seedlings. Thus, we fine mapped and characterized two QTLs for early seedling growth and provided useful information to improve crop breeding.
关键词Early seeding growth Leaf size Oryza sativa QTL fine mapping Rice plant
学科领域Plant Sciences
DOI10.1007/s00425-021-03576-6
收录类别SCI
语种英语
WOS关键词FLAG LEAF SIZE ; GENETIC DISSECTION ; CANDIDATE GENES ; YIELD ; ENCODES ; ROOT ; PLASTOCHRON ; MUTATION ; WEIGHT ; ALLELE
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号WOS:000616149400002
出版者SPRINGER
文献子类Article
出版地NEW YORK
EISSN1432-2048
资助机构National Key Research and Development Program of China [2016YFD0100402] ; Chinese Academy of Sciences [XDA24010101-2] ; National Natural Science Foundation of China [91735302, 91435113, 31471466]
作者邮箱songxj@ibcas.ac.cn
引用统计
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/26762
专题中科院植物分子生理学重点实验室
作者单位1.Chinese Acad Sci, Inst Bot, Key Lab Plant Mol Physiol, Beijing 100093, Peoples R China
2.Nagoya Univ, Biosci & Biotechnol Ctr, Nagoya, Aichi 4648601, Japan
3.Univ Chinese Acad Sci, Coll Adv Agr Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Innovat Acad Seed Design, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714
Cheng, Peng,Cao, Ling-Jie,Bai, Chen,et al. Fine mapping and characterization of two novel quantitative trait loci for early seedling growth in rice[J]. PLANTA,2021,253(2).
APA Cheng, Peng,Cao, Ling-Jie,Bai, Chen,Ashikari, Motoyuki,&Song, Xian-Jun.(2021).Fine mapping and characterization of two novel quantitative trait loci for early seedling growth in rice.PLANTA,253(2).
MLA Cheng, Peng,et al."Fine mapping and characterization of two novel quantitative trait loci for early seedling growth in rice".PLANTA 253.2(2021).
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