African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12227

Full Length Research Paper

Detection of elevated CO2 responsive QTLs for yield and its components in rice

Guizhi Fan1, 2, Xiaocan Li2, Qingsheng Cai1* and Jianguo Zhu3
  1College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China. 2College of Life Sciences, Northeast Forestry University, Harbin 150040, China. 3Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
Email: [email protected]

  •  Accepted: 12 May 2008
  •  Published: 03 June 2008

Abstract

 

A mapping population of IR24 (indica) chromosome segment substitution lines (CSSLs) in Asominori (japonica) background was used to detect quantitative trait loci (QTLs) for response to elevated CO2 in yield and its components of rice in free air CO2 enrichment (FACE, atmospheric CO2 plus 200 µmol CO2• mol-1) and natural atmospheric CO2 (Ambient) conditions. Transgressive segregation and continuous distribution in the CSSLs were observed for elevated CO2 response values (the value in FACE minus that in Ambient), in panicle number per plant (PN), grain number per panicle (GN), 1000 grain weight (GW) and yield per plant (YD), suggesting that all the tested traits responding to elevated CO2were quantitatively inherited. Three (qYD-1, qYD-10, qYD-12), two (qPN-5, qPN-10) and one (qGN-1) QTLs were detected for CO2 response to YD, PN and GN, respectively, but non-QTL for GW. Interestingly, both qYD-1 and qGN-1 were located at the same marker interval of C112-C2340, on chromosome 1, and had all positive response values from IR24. The results might be useful for understanding the genetic basis for responding to elevated COand breeding new rice varieties adapted to the higher atmospheric CO2 environment in the future.

 

Key words: Free air CO2 enrichment (FACE), quantitative trait loci (QTLs), rice (Oryza Sativa L.), yield and its component.