- THIS ARTICLE
- Full Text
- Full Text (PDF)
- Alert me when this article is cited
- Alert me if a correction is posted
- SERVICES
- Email this article to a friend
- Similar articles in this journal
- Similar articles in PubMed
- Alert me to new issues of the journal
- Download to citation manager
- Reprints & Permissions
- CITING ARTICLES
- Citing Articles via HighWire
- Citing Articles via Google Scholar
- GOOGLE SCHOLAR
- Articles by Li, J.
- Articles by McCouch, S. R.
- Search for Related Content
- PUBMED
- PubMed Citation
- Articles by Li, J.
- Articles by McCouch, S. R.
Genetics, Vol. 168, 2187-2195, December 2004, Copyright © 2004
doi:10.1534/genetics.104.034165
Fine Mapping of a Grain-Weight Quantitative Trait Locus in the Pericentromeric Region of Rice Chromosome 3
Jiming Li, Michael Thomson1 and Susan R. McCouch2
Department of Plant Breeding, Cornell University, Ithaca, New York 14853
2 Corresponding author: Department of Plant Breeding and Genetics, 162 Emerson Hall, Cornell University, Ithaca, NY 14853.
E-mail: srm4{at}cornell.edu
As the basis for fine mapping of a grain-weight QTL, gw3.1, a set of near isogenic lines (NILs), was developed from an Oryza sativa, cv. Jefferson x O. rufipogon (IRGC105491) population based on five generations of backcrossing and seven generations of selfing. Despite the use of an interspecific cross for mapping and the pericentromeric location of the QTL, we observed no suppression of recombination and have been able to narrow down the location of the gene underlying this QTL to a 93.8-kb region. The locus was associated with transgressive variation for grain size and grain weight in this population and features prominently in many other inter- and intraspecific crosses of rice. The phenotype was difficult to evaluate due to the large amount of variance in size and weight among grains on a panicle and between grains on primary and secondary panicles, underscoring the value of using multiple approaches to phenotyping, including extreme sampling and NIL group-mean comparisons. The fact that a QTL for kernel size has also been identified in a homeologous region of maize chromosome 1 suggests that this locus, in which the dominant O. rufipogon allele confers small seed size, may be associated with domestication in cereals.
This article has been cited by other articles:
 |
|
 |
|
  X. Wan, J. Weng, H. Zhai, J. Wang, C. Lei, X. Liu, T. Guo, L. Jiang, N. Su, and J. Wan Quantitative Trait Loci (QTL) Analysis For Rice Grain Width and Fine Mapping of an Identified QTL Allele gw-5 in a Recombination Hotspot Region on Chromosome 5 Genetics, August 1, 2008; 179(4): 2239 - 2252. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. K. Jena and D. J. Mackill Molecular Markers and Their Use in Marker-Assisted Selection in Rice Crop Sci., July 1, 2008; 48(4): 1266 - 1276. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Y.-G. Cho, H.-J. Kang, J.-S. Lee, Y.-T. Lee, S.-J. Lim, H. Gauch, M.-Y. Eun, and S. R. McCouch Identification of Quantitative Trait Loci in Rice for Yield, Yield Components, and Agronomic Traits across Years and Locations Crop Sci., November 7, 2007; 47(6): 2403 - 2417. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 G. He, X. Luo, F. Tian, K. Li, Z. Zhu, W. Su, X. Qian, Y. Fu, X. Wang, C. Sun, et al. Haplotype variation in structure and expression of a gene cluster associated with a quantitative trait locus for improved yield in rice Genome Res., May 1, 2006; 16(5): 618 - 626. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. C. Hall, C. J. Basten, and J. H. Willis Pleiotropic Quantitative Trait Loci Contribute to Population Divergence in Traits Associated With Life-History Variation in Mimulus guttatus Genetics, March 1, 2006; 172(3): 1829 - 1844. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. You, X. Lu, H. Jin, X. Ren, K. Liu, G. Yang, H. Yang, L. Zhu, and G. He Identification of Quantitative Trait Loci Across Recombinant Inbred Lines and Testcross Populations for Traits of Agronomic Importance in Rice Genetics, February 1, 2006; 172(2): 1287 - 1300. [Abstract] [Full Text] [PDF]
|
|