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Int. J. Mol. Sci. 2018, 19(5), 1460; https://doi.org/10.3390/ijms19051460

Genomic Regions Analysis of Seedling Root Traits and Their Regulation in Responses to Phosphorus Deficiency Tolerance in CSSL Population of Elite Super Hybrid Rice

1
State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, Zhejiang, China
2
Rice Research and Training Center, Field Crops Research Institute, Agriculture Research Center, Kafr Elsheikh 33717, Egypt
3
Jiangxi Academy of Agricultural Sciences, Nanchang 210014, China
*
Authors to whom correspondence should be addressed.
Received: 22 February 2018 / Revised: 28 April 2018 / Accepted: 2 May 2018 / Published: 14 May 2018
(This article belongs to the Section Molecular Plant Sciences)
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Abstract

Phosphorus (P) is the essential macro-element supporting rice productivity. Quantitative trait loci (QTL) underlying related traits at the seedling stage under two different phosphorus levels was investigated in rice using a population of 76 Chromosomal Sequence Substitution Lines (CSSLs) derived from a cross between the maintainer variety XieqingzaoB (P stress tolerant) and the restorer variety Zhonghui9308 (P stress sensitive); the parents of super hybrid rice Xieyou9308. A genetic linkage map with 120 DNA marker loci was constructed. At logarithmic odd (LOD) value of 2.0, a total of seven QTLs were detected for studied traits under two P levels and their relative ratio. The LOD values ranged from 2.00 to 3.32 and explaining 10.82% to 18.46% of phenotypic variation. Three QTLs were detected under low phosphorus (P), one under normal (P+) and three under their relative ratio (P/P+) on the rice chromosomes 3, 5, 6, 8 and 10. No significant QTLs were found for shoot dry weight (SDW) and total dry weight (TDW). The pleiotropic QTLs influencing root number (qRN5) and root dry weight (qRDW5) as novel QTLs under P level were detected near marker RM3638 on chromosome 5, which considered to directly contributing to phosphorus deficiency tolerance in rice. These QTLs need further analysis, including the fine mapping and cloning, which may use in molecular marker assisted breeding. View Full-Text
Keywords: rice; phosphorus deficiency; genomic regions; CSSLs; root traits rice; phosphorus deficiency; genomic regions; CSSLs; root traits
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Anis, G.B.; Zhang, Y.; Wang, H.; Li, Z.; Wu, W.; Sun, L.; Riaz, A.; Cao, L.; Cheng, S. Genomic Regions Analysis of Seedling Root Traits and Their Regulation in Responses to Phosphorus Deficiency Tolerance in CSSL Population of Elite Super Hybrid Rice. Int. J. Mol. Sci. 2018, 19, 1460.

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