Retracted: Screening of candidate genes and fine mapping of drought tolerance quantitative trait loci on chromosome 4 in rice (Oryza sativa L.) under drought stress

Ecology and Evolution

Yuan-Yuan Nie²  Lin Zhang²  Yun-Hua Wu²  Hao-Jie Liu²  Wei-Wei Mao²  Juan Du²  Hai-Lin Xiu²  Xiao-Yu Wu²  Xia Li³  Yu-Wei Yan¹  Guo-Lan Liu⁴  Hong-Yan Liu⁴ 

[1] Department of Plant and Microbial Biology, UC Berkeley, Berkeley, California;College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang, China;Jiangxi Super-rice Research and Development Center/National Engineering Laboratory for Rice, Nanchang, China;Shanghai Agrobiological Gene Center, Shanghai, China

关键词: Candidate genes;    drought stress;    drought tolerance;    fine mapping;    quantitative trait loci;    rice (Oryza sativa L.);   

DOI  :  10.1002/ece3.1786

来源: Wiley

【 摘 要 】

Abstract

Due to severe water resource shortage, genetics of and breeding for DT (drought tolerance) in rice (Oryza sativa L.) have become one of the hot research topics. Identification of grain yield QTLs (quantitative trait loci) directly related to the DT trait of rice can provide useful information for breeding new drought-resistant and water-saving rice varieties via marker-assisted selection. A population of 105 advanced BILs (backcross introgression lines) derived from a cross between Zhenshan97B and IRAT109 in Zhenshan97B background were grown under drought stress in a field experiment and phenotypic traits were investigated. The results showed that in the target interval of RM273-RM255 on chromosome 4, three main-effect QTLs related to panicle length, panicle number, and spikelet number per panicle were identified (LOD [logarithm of the odds] > 2.0). The panicle length-related QTL had two loci located in the neighboring intervals of RM17308-RM17305 and RM17349-RM17190, which explained 18.80% and 20.42%, respectively, of the phenotypic variation, while the panicle number-related QTL was identified in the interval of RM1354-RM17308, explaining 11.47% of the phenotypic variation. As far as the spikelet number per panicle-related QTL was concerned, it was found to be located in the interval of RM17308-RM17305, which explained 28.08% of the phenotypic variation. Using the online Plant-GE query system, a total of 13 matched ESTs (expressed sequence tags) were found in the target region, and of the 13 ESTs, 12 had corresponding predicted genes. For instance, the two ESTs CB096766 and CA765747 were corresponded to the same predicted gene LOC_Os04g46370, while the other four ESTs, CA754286, CB000011, CX056247, and CX056240, were corresponded to the same predicted gene LOC_Os04g46390.

【 授权许可】

CC BY   
© 2015 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.

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