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Identification and fine mapping of qPH6, a novel major quantitative trait locus for plant height in rice

文献类型： 外文期刊

作者： Yuan, Yuan 1 ; Miao, Jun 1 ; Tao, Yajun 1 ; Ji, Chaoqiu; Du, Peina 1 ; Wang, Jun; Wang, Zhongde 1 ; Chen, Da 2 ; Gong, 1 ;

作者机构： 1.Yangzhou Univ, Jiangsu Key Lab Crop Genet & Physiol, Coinnovat Ctr Modern Prod Technol Grain Crops, Key Lab Plant Funct Genom,Minist Educ, Yangzhou 225009, Jiangsu, Peoples R China

2.Yangzhou Univ, Jiangsu Key Lab Crop Genet & Physiol, Coinnovat Ctr Modern Prod Technol Grain Crops, Key Lab Plant

关键词： Rice;Plant height;Quantitative trait loci;Fine mapping

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

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收录情况： SCI

摘要： Plant height is one of the determinants that influence rice plant architecture and grain yield. Identification of useful novel genes related to plant height is necessary for breeding high-yield rice. In this study, C33084, a backcross introgression line derived from a japonica cultivar (Balilla) as the recurrent parent and an indica cultivar (Dular) as the donor parent, was employed to characterize a novel major quantitative trait locus with a large effect on plant height in rice. C33084 showed a significantly higher plant height than Balilla. Genetic analysis of the F-2 and F-4 generations deriving from a cross between C33084 and Balilla revealed that this phenotypic variation was controlled by a single Mendelian factor, qPH6, which is located on the long arm of chromosome 6. The recessive allele, qph6, from Balilla has a negative effect on plant height. Fine mapping was carried out with a total of 1,791 recessive individuals from the F-2 and F-4 generations, and the gene was delimited to a similar to 41-kb region containing three annotated genes according to available sequence annotation databases. This information could be helpful for future identification and isolation of the candidate genes. Phenotypic evaluation of the near isogenic lines NIL (qPH6) and NIL (qph6) suggested that qPH6 has no pleiotropic effect on other traits. The discovery of qPH6 might be useful for the design and breeding of crops with high grain yield and quality.

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