Journal of Experimental Botany, Vol. 52, No. 362, pp. 1827-1833,
September 1, 2001
© 2001 Oxford University Press
Original Papers |
Are contents of Rubisco, soluble protein and nitrogen in flag leaves of rice controlled by the same genetics?
1 National Institute of Agrobiological Sciences, 2-1-2, Kannondai, Tsukuba, Ibaraki 305-8602, Japan
2 Rice Genome Research Program, National Institute of Agrobiological Sciences/Institute of Society for Techno-Innovation of Agriculture, Forestry, and Fisheries, 2-1-2, Kannondai, Tsukuba, Ibaraki 305-8602, Japan
Genetic relations among the contents of Rubisco, soluble protein and total leaf nitrogen (N) in leaves of rice (Oryza sativa L.) were studied by quantitative trait loci (QTL) analysis with a population of backcross inbred lines (BILs) of japonica Nipponbarexindica Kasalath. The ratio of Rubisco to total leaf N in leaves is the main target in improving photosynthetic N-use efficiency in plants. QTLs controlling Rubisco content were not detected near QTLs for total leaf N content. These results indicate that contents of Rubisco and total leaf N are controlled by different genetics. QTLs that controlled the ratio of Rubisco to total leaf N (CORNs) were detected. These results suggest that some mechanism(s) may be involved in determining this ratio, while the contents of Rubisco and total leaf N are controlled in other ways. In elite BILs, the ratios of Rubisco to total leaf N were higher than those of both parents. These results suggest a good possibility of improving N-use efficiency by CORNs in cultivated rice. A QTL controlling Rubisco content was mapped near a QTL for soluble protein content on chromosome 8 at 5 d after heading and on chromosome 9 at 25 d. In each chromosome region, the peaks of both QTLs overlapped accurately, giving a high possibility of pleiotropic effects by the same genes. Different QTLs controlling soluble protein or Rubisco were detected from those detected at 5 d or 25 d after heading. This suggests that these traits are genetically controlled depending on the growth stages of leaves.
Key words: Nitrogen, Oryza sativa (rice), quantitative trait loci (QTL), Rubisco.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  M. Frei, J. P. Tanaka, and M. Wissuwa Genotypic variation in tolerance to elevated ozone in rice: dissection of distinct genetic factors linked to tolerance mechanisms J. Exp. Bot., October 1, 2008; 59(13): 3741 - 3752. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 L. C. Brouillette, D. M. Rosenthal, L. H. Rieseberg, C. Lexer, R. L. Malmberg, and L. A. Donovan Genetic Architecture of Leaf Ecophysiological Traits in Helianthus J. Hered., March 1, 2007; 98(2): 142 - 146. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Ma. R. Laza, M. Kondo, O. Ideta, E. Barlaan, and T. Imbe Identification of Quantitative Trait Loci for {delta}13C and Productivity in Irrigated Lowland Rice Crop Sci., February 24, 2006; 46(2): 763 - 773. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. Ishimaru, T. Kashiwagi, N. Hirotsu, and Y. Madoka Identification and physiological analyses of a locus for rice yield potential across the genetic background J. Exp. Bot., October 1, 2005; 56(420): 2745 - 2753. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. Kashiwagi and K. Ishimaru Identification and Functional Analysis of a Locus for Improvement of Lodging Resistance in Rice Plant Physiology, February 1, 2004; 134(2): 676 - 683. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. Ishimaru Identification of a Locus Increasing Rice Yield and Physiological Analysis of Its Function Plant Physiology, November 1, 2003; 133(3): 1083 - 1090. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Mickelson, D. See, F. D. Meyer, J. P. Garner, C. R. Foster, T. K. Blake, and A. M. Fischer Mapping of QTL associated with nitrogen storage and remobilization in barley (Hordeum vulgare L.) leaves J. Exp. Bot., February 1, 2003; 54(383): 801 - 812. [Abstract] [Full Text] [PDF]
|
|