African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12487

Full Length Research Paper

Bayesian dissection for genetic architecture of traits associated with nitrogen utilization efficiency in rice

Zhongze Piao1, Maobai Li1, Peide Li3, Jianming Zhang1, Chunmei Zhu4, Hui Wang1, Zhixiang Luo5, Jungro Lee6 and Runqing Yang 2*
  1Crop Breeding and Cultivation Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China. 2School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China. 3Hubei Academy of Agricultural Sciences, Wuhan 430064, China. 4Haifeng Farm of Shanghai, Jiangsu Dafeng 224100. 5Rice Research Institute, Anhui Academy of Agricultural Sciences, Anhui 230031, China. 6National institute of agricultural biotechnology rural development administration Suwon 441707, Republic of Korea.
Email: [email protected]

  •  Accepted: 20 November 2009
  •  Published: 15 December 2009

Abstract

 

Nitrogen is one of the key important nutrients in rice production. High rice grain yield is greatly dependent upon economic nitrogen input and genetic factors. In order to locate quantitative loci for traits associated with nitrogen utilization efficiency in rice, F9 recombinant inbred lines derived from a Korean tongil type Dasanbyeo and a Chinese japonica variety TR22183 was genetically designed. The six traits of interest were observed on 155 RILs, along with 105 SSR and 103 STS markers. Bayesian model selection technique was used to dissect genetic architecture for traits of interest. A total of 28 main-effect QTLs and 23 pairs of epistatic QTLs were detected for traits associated with nitrogen utilization efficiency. The proportions of phenotypic variation explained by the detected QTLs ranged from 0.09 to 16.90% and from 0.19 to 12.76% for main-effect and epistatic QTLs, respectively. Sixteen of main-effect QTLs interacted with nitrogen level. One pleiotropic QTL was found, governing simultaneously nitrogen dry matter production efficiency and Nitrogen grain production efficiency.

 

Key words: Rice, nitrogen utilization efficiency, QTL, epistatic, interaction of QTL × nitrogen level.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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